of_irq_to_resource() has recently been fixed to return negative error #'s
along with 0 in case of failure, however the Freescale MPC832x RDB board
code still only regards 0 as a failure indication -- fix it up.
Fixes: 7a4228bbff76 ("of: irq: use of_irq_get() in of_irq_to_resource()") Signed-off-by: Sergei Shtylyov <[email protected]> Acked-by: Scott Wood <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
When more than one GPIO IRQs are triggered simultaneously,
tegra_gpio_irq_handler() called chained_irq_exit() multiple
times for one chained_irq_enter().
Fixes: 3c92db9ac0ca3eee8e46e2424b6c074e2e394ad9 Signed-off-by: Michał Mirosław <[email protected]>
[Also changed the variable to a bool] Signed-off-by: Linus Walleij <[email protected]>
Andy Lutomirski [Tue, 1 Aug 2017 15:37:26 +0000 (08:37 -0700)]
platform/x86: dell-wmi: Fix driver interface version query
When I converted dell-wmi to the new bus infrastructure, I left the
call to dell_wmi_check_descriptor_buffer() in dell_wmi_init(). This
could cause two problems:
- An error message when loading the driver on a system without
dell-wmi. We'd try to read the event descriptor even if the WMI
GUID wasn't there.
- A possible race if dell-wmi was loaded manually before wmi was
fully initialized.
Fix it by moving the call to the probe function where it belongs.
Fixes: bff589be59c5 ("platform/x86: dell-wmi: Convert to the WMI bus infrastructure") Signed-off-by: Andy Lutomirski <[email protected]> Reviewed-by: Pali Rohár <[email protected]> Signed-off-by: Darren Hart (VMware) <[email protected]>
Trond Myklebust [Tue, 1 Aug 2017 20:02:47 +0000 (16:02 -0400)]
NFSv4: Fix EXCHANGE_ID corrupt verifier issue
The verifier is allocated on the stack, but the EXCHANGE_ID RPC call was
changed to be asynchronous by commit 8d89bd70bc939. If we interrrupt
the call to rpc_wait_for_completion_task(), we can therefore end up
transmitting random stack contents in lieu of the verifier.
I encounter this when trying to stress the async page fault in L1 guest w/
L2 guests running.
Commit 9b132fbe5419 (Add rcu user eqs exception hooks for async page
fault) adds rcu_irq_enter/exit() to kvm_async_pf_task_wait() to exit cpu
idle eqs when needed, to protect the code that needs use rcu. However,
we need to call the pair even if the function calls schedule(), as seen
from the above backtrace.
This patch fixes it by informing the RCU subsystem exit/enter the irq
towards/away from idle for both n.halted and !n.halted.
Paolo Bonzini [Thu, 27 Jul 2017 10:29:32 +0000 (12:29 +0200)]
KVM: nVMX: fixes to nested virt interrupt injection
There are three issues in nested_vmx_check_exception:
1) it is not taking PFEC_MATCH/PFEC_MASK into account, as reported
by Wanpeng Li;
2) it should rebuild the interruption info and exit qualification fields
from scratch, as reported by Jim Mattson, because the values from the
L2->L0 vmexit may be invalid (e.g. if an emulated instruction causes
a page fault, the EPT misconfig's exit qualification is incorrect).
3) CR2 and DR6 should not be written for exception intercept vmexits
(CR2 only for AMD).
This patch fixes the first two and adds a comment about the last,
outlining the fix.
Paolo Bonzini [Thu, 27 Jul 2017 08:31:25 +0000 (10:31 +0200)]
KVM: nVMX: do not fill vm_exit_intr_error_code in prepare_vmcs12
Do this in the caller of nested_vmx_vmexit instead.
nested_vmx_check_exception was doing a vmwrite to the vmcs02's
VM_EXIT_INTR_ERROR_CODE field, so that prepare_vmcs12 would move
the field to vmcs12->vm_exit_intr_error_code. However that isn't
possible on pre-Haswell machines. Moving the vmcs12 write to the
callers fixes it.
Linus Torvalds [Tue, 1 Aug 2017 20:20:24 +0000 (13:20 -0700)]
Merge branch 'parisc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parsic fixes from Helge Deller:
- Our cache flushing code ran into a BUG in case context is not
current. Fix it by flushing the whole cache in such rare situations
(by Dave Anglin).
- Fix a "sleeping function called from invalid context BUG" in our
pdc_stable driver by rearranging our locks (by James Bottomley)
- The thread and irq stacks require more than 16 KB since kernel 4.11.
Increase both to 32 KB.
- Define CONFIG_CPU_BIG_ENDIAN unconditionally on parisc to avoid wrong
behaviour in qrwlock functions (by Babu Moger).
* 'parisc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Define CONFIG_CPU_BIG_ENDIAN
parisc: pdc_stable: Fix locking when creating sysfs links
parisc: Increase thread and stack size to 32kb
parisc: Handle vma's whose context is not current in flush_cache_range
libceph: fallback for when there isn't a pool-specific choose_arg
There is now a fallback to a choose_arg index of -1 if there isn't
a pool-specific choose_arg set. If you create a per-pool weight-set,
that works for that pool. Otherwise we try the compat/default one. If
that doesn't exist either, then we use the normal CRUSH weights.
libceph: don't call ->reencode_message() more than once per message
Reencoding an already reencoded message is a bad idea. This could
happen on Policy::stateful_server connections (!CEPH_MSG_CONNECT_LOSSY),
such as MDS sessions.
This didn't pop up in testing because currently only OSD requests are
reencoded and OSD sessions are always lossy.
libceph: make encode_request_*() work with r_mempool requests
Messages allocated out of ceph_msgpool have a fixed front length
(pool->front_len). Asserting that the entire front has been filled
while encoding is thus wrong.
Tony Lindgren [Fri, 28 Jul 2017 08:23:15 +0000 (01:23 -0700)]
device property: Fix usecount for of_graph_get_port_parent()
Fix inconsistent use of of_graph_get_port_parent() where
asoc_simple_card_parse_graph_dai() does of_node_get() before
calling it while other callers do not. We can fix this by
not trashing the node passed to of_graph_get_port_parent().
Let's also make sure the callers have correct refcounts and remove
related incorrect of_node_put() calls for of_for_each_phandle
as that's done by of_phandle_iterator_next() except when
we break out of the loop early.
Let's fix both issues with a single patch to avoid kobject
refcounts getting messed up more if two patches are merged
separately.
Otherwise strange issues can happen caused by memory corruption
caused by too many kobject_del() calls such as:
BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:747
...
(___might_sleep)
(__mutex_lock)
(mutex_lock_nested)
(kernfs_remove)
(kobject_del)
(kobject_put)
(of_get_next_parent)
(of_graph_get_port_parent)
(asoc_simple_card_parse_graph_dai [snd_soc_simple_card_utils])
(asoc_graph_card_probe [snd_soc_audio_graph_card])
Fixes: 0ef472a973eb ("of_graph: add of_graph_get_port_parent()") Fixes: 2692c1c63c29 ("ASoC: add audio-graph-card support") Fixes: 1689333f8311 ("ASoC: simple-card-utils: add asoc_simple_card_parse_graph_dai()") Signed-off-by: Tony Lindgren <[email protected]> Reviewed-by: Rob Herring <[email protected]> Tested-by: Antonio Borneo <[email protected]> Tested-by: Kuninori Morimoto <[email protected]> Signed-off-by: Mark Brown <[email protected]>
For e.g. HZ=100, timer being 430 jiffies in the future, and 32 bit
unsigned int, there is an overflow on unsigned int right-hand side
of the expression which results with wrong values being returned.
Type cast the multiplier to 64bit to avoid that issue.
gpiolib: skip unwanted events, don't convert them to opposite edge
The previous fix for filtering out of unwatched events was not entirely
correct. Instead of skipping the events we don't want, they are now
interpreted as events with opposing edge.
In order to fix it: always read the GPIO line value on interrupt and
only emit the event if it corresponds with the event type we requested.
Jan Kiszka [Wed, 19 Jul 2017 05:31:14 +0000 (07:31 +0200)]
gpio: exar: Use correct property prefix and document bindings
The device-specific property should be prefixed with the vendor name,
not "linux,", as Linus Walleij pointed out. Change this and document the
bindings of this platform device.
We didn't ship the old binding in a release yet. So we can still change
it without breaking an official API.
Fixes: 380b1e2f3a2f ("gpio-exar/8250-exar: Make set of exported GPIOs configurable") Signed-off-by: Jan Kiszka <[email protected]> Acked-by: Rob Herring <[email protected]> Signed-off-by: Linus Walleij <[email protected]>
Marc Zyngier [Fri, 21 Jul 2017 17:15:27 +0000 (18:15 +0100)]
arm64: Use arch_timer_get_rate when trapping CNTFRQ_EL0
In an ideal world, CNTFRQ_EL0 always contains the timer frequency
for the kernel to use. Sadly, we get quite a few broken systems
where the firmware authors cannot be bothered to program that
register on all CPUs, and rely on DT to provide that frequency.
So when trapping CNTFRQ_EL0, make sure to return the actual rate
(as known by the kernel), and not CNTFRQ_EL0.
Thomas Gleixner [Mon, 31 Jul 2017 20:07:09 +0000 (22:07 +0200)]
x86/hpet: Cure interface abuse in the resume path
The HPET resume path abuses irq_domain_[de]activate_irq() to restore the
MSI message in the HPET chip for the boot CPU on resume and it relies on an
implementation detail of the interrupt core code, which magically makes the
HPET unmask call invoked via a irq_disable/enable pair. This worked as long
as the irq code did unconditionally invoke the unmask() callback. With the
recent changes which keep track of the masked state to avoid expensive
hardware access, this does not longer work. As a consequence the HPET timer
interrupts are not unmasked which breaks resume as the boot CPU waits
forever that a timer interrupt arrives.
Make the restore of the MSI message explicit and invoke the unmask()
function directly. While at it get rid of the pointless affinity setting as
nothing can change the affinity of the interrupt and the vector across
suspend/resume. The restore of the MSI message reestablishes the previous
affinity setting which is the correct one.
gpio: gpio-mxc: Fix: higher 16 GPIOs usable as wake source
In the function gpio_set_wake_irq(), port->irq_high is only checked for
zero. As platform_get_irq() returns a value less then zero if no interrupt
was found, any gpio >= 16 was handled like an irq_high interrupt was
available. On iMX27 for example no high interrupt is available. This lead
to the problem that only some gpios (the lower 16) were useable as wake
sources.
pinctrl: stm32: select IRQ_DOMAIN_HIERARCHY instead of depends on
Drivers that need IRQ_DOMAIN_HIERARCHY should "select" it, but
drivers/pinctrl/stm32/Kconfig is the only exception that uses
"depends on" syntax. This prevents GPIO drivers from select'ing
IRQ_DOMAIN_HIERARCHY.
For example, if I add "select IRQ_DOMAIN_HIERARCHY" to GPIO_XGENE_SB,
I get the following recursive dependency error.
drivers/gpio/Kconfig:13:error: recursive dependency detected!
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpio/Kconfig:13: symbol GPIOLIB is selected by PINCTRL_STM32
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/pinctrl/stm32/Kconfig:3: symbol PINCTRL_STM32 is selected by PINCTRL_STM32F429
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/pinctrl/stm32/Kconfig:11: symbol PINCTRL_STM32F429 depends on IRQ_DOMAIN_HIERARCHY
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
kernel/irq/Kconfig:67: symbol IRQ_DOMAIN_HIERARCHY is selected by GPIO_XGENE_SB
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
drivers/gpio/Kconfig:502: symbol GPIO_XGENE_SB depends on GPIOLIB
William Tu [Mon, 31 Jul 2017 21:40:50 +0000 (14:40 -0700)]
samples/bpf: fix bpf tunnel cleanup
test_tunnel_bpf.sh fails to remove the vxlan11 tunnel device, causing the
next geneve tunnelling test case fails. In addition, the geneve reserved bit
in tcbpf2_kern.c should be zero, according to the RFC.
Paolo Abeni [Mon, 31 Jul 2017 14:52:36 +0000 (16:52 +0200)]
udp6: fix jumbogram reception
Since commit 67a51780aebb ("ipv6: udp: leverage scratch area
helpers") udp6_recvmsg() read the skb len from the scratch area,
to avoid a cache miss.
But the UDP6 rx path support RFC 2675 UDPv6 jumbograms, and their
length exceeds the 16 bits available in the scratch area. As a side
effect the length returned by recvmsg() is:
<ingress datagram len> % (1<<16)
This commit addresses the issue allocating one more bit in the
IP6CB flags field and setting it for incoming jumbograms.
Such field is still in the first cacheline, so at recvmsg()
time we can check it and fallback to access skb->len if
required, without a measurable overhead.
Fixes: 67a51780aebb ("ipv6: udp: leverage scratch area helpers") Signed-off-by: Paolo Abeni <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ppp: Fix a scheduling-while-atomic bug in del_chan
The PPTP set the pptp_sock_destruct as the sock's sk_destruct, it would
trigger this bug when __sk_free is invoked in atomic context, because of
the call path pptp_sock_destruct->del_chan->synchronize_rcu.
Now move the synchronize_rcu to pptp_release from del_chan. This is the
only one case which would free the sock and need the synchronize_rcu.
The following is the panic I met with kernel 3.3.8, but this issue should
exist in current kernel too according to the codes.
Revert "net: bcmgenet: Remove init parameter from bcmgenet_mii_config"
This reverts commit 28b45910ccda ("net: bcmgenet: Remove init parameter
from bcmgenet_mii_config") because in the process of moving from
dev_info() to dev_info_once() we essentially lost the helpful printed
messages once the second instance of the driver is loaded.
dev_info_once() does not actually print the message once per device
instance, but once period.
Fixes: 28b45910ccda ("net: bcmgenet: Remove init parameter from bcmgenet_mii_config") Signed-off-by: Florian Fainelli <[email protected]> Reviewed-by: Doug Berger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Seth Forshee noticed a performance degradation with some workloads.
This turns out to be due to packet drops. Euan Kemp noticed that this
is because we drop all packets where length exceeds the truesize, but
for some packets we add in extra memory without updating the truesize.
This in turn was kept around unchanged from ab7db91705e95 ("virtio-net:
auto-tune mergeable rx buffer size for improved performance"). That
commit had an internal reason not to account for the extra space: not
enough bits to do it. No longer true so let's account for the allocated
length exactly.
Many thanks to Seth Forshee for the report and bisecting and Euan Kemp
for debugging the issue.
Sergei Shtylyov [Sat, 29 Jul 2017 19:18:41 +0000 (22:18 +0300)]
mv643xx_eth: fix of_irq_to_resource() error check
of_irq_to_resource() has recently been fixed to return negative error #'s
along with 0 in case of failure, however the Marvell MV643xx Ethernet
driver still only regards 0 as invalid IRQ -- fix it up.
Fixes: 7a4228bbff76 ("of: irq: use of_irq_get() in of_irq_to_resource()") Signed-off-by: Sergei Shtylyov <[email protected]> Signed-off-by: David S. Miller <[email protected]>
MAINTAINERS: Add more files to the PHY LIBRARY section
Include missing files that are provided by, used, or directly maintained
within the PHY LIBRARY, this include uapi header, header files used by
Device Tree code etc.
ipv4: fib: Fix NULL pointer deref during fib_sync_down_dev()
Michał reported a NULL pointer deref during fib_sync_down_dev() when
unregistering a netdevice. The problem is that we don't check for
'in_dev' being NULL, which can happen in very specific cases.
Usually routes are flushed upon NETDEV_DOWN sent in either the netdev or
the inetaddr notification chains. However, if an interface isn't
configured with any IP address, then it's possible for host routes to be
flushed following NETDEV_UNREGISTER, after NULLing dev->ip_ptr in
inetdev_destroy().
To reproduce:
$ ip link add type dummy
$ ip route add local 1.1.1.0/24 dev dummy0
$ ip link del dev dummy0
Fix this by checking for the presence of 'in_dev' before referencing it.
net: phy: Correctly process PHY_HALTED in phy_stop_machine()
Marc reported that he was not getting the PHY library adjust_link()
callback function to run when calling phy_stop() + phy_disconnect()
which does not indeed happen because we set the state machine to
PHY_HALTED but we don't get to run it to process this state past that
point.
Fix this with a synchronous call to phy_state_machine() in order to have
the state machine actually act on PHY_HALTED, set the PHY device's link
down, turn the network device's carrier off and finally call the
adjust_link() function.
Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
"Several cgroup bug fixes.
- cgroup core was calling a migration callback on empty migrations,
which could make cpuset crash.
- There was a very subtle bug where the controller interface files
aren't created directly when cgroup2 is mounted. Because later
operations create them, this bug didn't get noticed earlier.
- Failed writes to cgroup.subtree_control were incorrectly returning
zero"
* 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: fix error return value from cgroup_subtree_control()
cgroup: create dfl_root files on subsys registration
cgroup: don't call migration methods if there are no tasks to migrate
Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue fixes from Tejun Heo:
"Two notable fixes.
- While adding NUMA affinity support to unbound workqueues, the
assumption that an unbound workqueue with max_active == 1 is
ordered was broken.
The plan was to use explicit alloc_ordered_workqueue() for those
cases. Unfortunately, I forgot to update the documentation properly
and we grew a handful of use cases which depend on that assumption.
While we want to convert them to alloc_ordered_workqueue(), we
don't really lose anything by enforcing ordered execution on
unbound max_active == 1 workqueues and it doesn't make sense to
risk subtle bugs. Restore the assumption.
- Workqueue assumes that CPU <-> NUMA node mapping remains static.
This is a general assumption - we don't have any synchronization
mechanism around CPU <-> node mapping. Unfortunately, powerpc may
change the mapping dynamically leading to crashes. Michael added a
workaround so that we at least don't crash while powerpc hotplug
code gets updated"
* 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: Work around edge cases for calc of pool's cpumask
workqueue: implicit ordered attribute should be overridable
workqueue: restore WQ_UNBOUND/max_active==1 to be ordered
Merge branch 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"Dan found a really old bug where libata hotplug code wasn't sanitizing
index value from userland and may end up indexing with a negative
number. It is scary but fortunately can only be triggered by root.
Other than that, minor fixes"
* 'for-4.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
libata: fix a couple of doc build warnings
libata: array underflow in ata_find_dev()
ata: sata_rcar: add gen[23] fallback compatibility strings
libata: remove unused rc in ata_eh_handle_port_resume
libata: Cleanup ata_read_log_page()
ata: fix gemini Kconfig dependencies
clk: samsung: exynos5420: The EPLL rate table corrections
This patch fixes values of the EPLL K coefficient and changes
the EPLL output frequency values to match exactly what is
possible to achieve with given M, P, S, K coefficients.
This allows to avoid rounding errors and unexpected frequency
being set with clk_set_rate(), due to recalc_rate returning
different values than the PLL rate specified in the
exynos5420_epll_24mhz_tbl table. E.g. this prevents a case
where two consecutive clk_set_rate() calls with same argument
result in different PLL output frequency.
The PLL output frequencies have been calculated with formula:
While working on enabling queued rwlock on SPARC, found this following
code in include/asm-generic/qrwlock.h which uses CONFIG_CPU_BIG_ENDIAN
to clear a byte.
Jonathan Corbet [Sun, 30 Jul 2017 22:16:04 +0000 (16:16 -0600)]
libata: fix a couple of doc build warnings
The kerneldoc comments for a couple of functions in drivers/ata/libata-eh.c
had fallen behind the current implementation, resulting in these doc build
warnings:
./drivers/ata/libata-eh.c:1449: warning: No description found for parameter 'link'
./drivers/ata/libata-eh.c:1449: warning: Excess function parameter 'ap' description in 'ata_eh_done'
./drivers/ata/libata-eh.c:1590: warning: No description found for parameter 'qc'
./drivers/ata/libata-eh.c:1590: warning: Excess function parameter 'dev' description in 'ata_eh_request_sense'
Update the comments and make the warnings go away.
thunderbolt: icm: Ignore mailbox errors in icm_suspend()
On one of my test machines nhi_mailbox_cmd() called from icm_suspend()
times out and returnes an error which then is propagated to the
caller and causes the entire system suspend to be aborted which isn't
very useful.
Instead of aborting system suspend, print the error into the log
and continue.
Nicholas Piggin [Sat, 29 Jul 2017 12:50:27 +0000 (22:50 +1000)]
powerpc/64s: Fix stack setup in watchdog soft_nmi_common()
The watchdog soft-NMI exception stack setup loads a stack pointer
twice, which is an obvious error. It ends up using the system reset
interrupt (true-NMI) stack, which is also a bug because the watchdog
could be preempted by a system reset interrupt that overwrites the
NMI stack.
Change the soft-NMI to use the "emergency stack". The current kernel
stack is not used, because of the longer-term goal to prevent
asynchronous stack access using soft-disable.
Fixes: 2104180a5369 ("powerpc/64s: implement arch-specific hardlockup watchdog") Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
Since kernel 4.11 the thread and irq stacks on parisc randomly overflow
the default size of 16k. The reason why stack usage suddenly grew is yet
unknown.
This patch modifies flush_cache_range() to handle non current contexts.
In as much as this occurs infrequently, the simplest approach is to
flush the entire cache when this happens.
Jeff Layton [Mon, 31 Jul 2017 04:55:34 +0000 (00:55 -0400)]
ext4: convert swap_inode_data() over to use swap() on most of the fields
For some odd reason, it forces a byte-by-byte copy of each field. A
plain old swap() on most of these fields would be more efficient. We
do need to retain the memswap of i_data however as that field is an array.
Emoly Liu [Mon, 31 Jul 2017 04:40:22 +0000 (00:40 -0400)]
ext4: error should be cleared if ea_inode isn't added to the cache
For Lustre, if ea_inode fails in hash validation but passes parent
inode and generation checks, it won't be added to the cache as well
as the error "-EFSCORRUPTED" should be cleared, otherwise it will
cause "Structure needs cleaning" when running getfattr command.
Jan Kara [Mon, 31 Jul 2017 03:33:01 +0000 (23:33 -0400)]
ext4: Don't clear SGID when inheriting ACLs
When new directory 'DIR1' is created in a directory 'DIR0' with SGID bit
set, DIR1 is expected to have SGID bit set (and owning group equal to
the owning group of 'DIR0'). However when 'DIR0' also has some default
ACLs that 'DIR1' inherits, setting these ACLs will result in SGID bit on
'DIR1' to get cleared if user is not member of the owning group.
Fix the problem by moving posix_acl_update_mode() out of
__ext4_set_acl() into ext4_set_acl(). That way the function will not be
called when inheriting ACLs which is what we want as it prevents SGID
bit clearing and the mode has been properly set by posix_acl_create()
anyway.
When changing a file's acl mask, __ext4_set_acl() will first set the group
bits of i_mode to the value of the mask, and only then set the actual
extended attribute representing the new acl.
If the second part fails (due to lack of space, for example) and the file
had no acl attribute to begin with, the system will from now on assume
that the mask permission bits are actual group permission bits, potentially
granting access to the wrong users.
Prevent this by only changing the inode mode after the acl has been set.
Eric Whitney [Mon, 31 Jul 2017 02:30:11 +0000 (22:30 -0400)]
ext4: remove unused metadata accounting variables
Two variables in ext4_inode_info, i_reserved_meta_blocks and
i_allocated_meta_blocks, are unused. Removing them saves a little
memory per in-memory inode and cleans up clutter in several tracepoints.
Adjust tracepoint output from ext4_alloc_da_blocks() for consistency
and fix a typo and whitespace near these changes.
Eric Whitney [Mon, 31 Jul 2017 02:26:40 +0000 (22:26 -0400)]
ext4: correct comment references to ext4_ext_direct_IO()
Commit 914f82a32d0268847 "ext4: refactor direct IO code" deleted
ext4_ext_direct_IO(), but references to that function remain in
comments. Update them to refer to ext4_direct_IO_write().
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A small set of x86 fixes:
- prevent the kernel from using the EFI reboot method when EFI is
disabled.
- two patches addressing clang issues"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot: Disable the address-of-packed-member compiler warning
x86/efi: Fix reboot_mode when EFI runtime services are disabled
x86/boot: #undef memcpy() et al in string.c
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
"Two patches addressing build warnings caused by inconsistent kernel
doc comments"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/wait: Clean up some documentation warnings
sched/core: Fix some documentation build warnings
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A couple of fixes for performance counters and kprobes:
- a series of small patches which make the uncore performance
counters on Skylake server systems work correctly
- add a missing instruction slot release to the failure path of
kprobes"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
kprobes/x86: Release insn_slot in failure path
perf/x86/intel/uncore: Fix missing marker for skx_uncore_cha_extra_regs
perf/x86/intel/uncore: Fix SKX CHA event extra regs
perf/x86/intel/uncore: Remove invalid Skylake server CHA filter field
perf/x86/intel/uncore: Fix Skylake server CHA LLC_LOOKUP event umask
perf/x86/intel/uncore: Fix Skylake server PCU PMU event format
perf/x86/intel/uncore: Fix Skylake UPI PMU event masks
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Thomas Gleixner:
"Fix for a regression caused by the conversion of x86 to the generic
hotplug code.
Instead of doing a plain single line revert, this adds a pile of
comments so the semantics of the force argument are clear"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/cpuhotplug: Revert "Set force affinity flag on hotplug migration"
ACPI HID for Hisilicon Hip07/08 should be HISI02A1/2,
not HISI0A21/2, HISI02A1/2 was tested ok but was modified
by the stupid typo when upstream the patches (by me),
correct them to the right IDs (matching the IDs in
drivers/i2c/busses/i2c-designware-platdrv.c).
Fixes: 6e14cf361a0c (ACPI / APD: Add clock frequency for Hisilicon Hip07/08 I2C controller) Reported-by: Tao Tian <[email protected]> Signed-off-by: Hanjun Guo <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
cpufreq: x86: Make scaling_cur_freq behave more as expected
After commit f8475cef9008 "x86: use common aperfmperf_khz_on_cpu() to
calculate KHz using APERF/MPERF" the scaling_cur_freq policy attribute
in sysfs only behaves as expected on x86 with APERF/MPERF registers
available when it is read from at least twice in a row. The value
returned by the first read may not be meaningful, because the
computations in there use cached values from the previous iteration
of aperfmperf_snapshot_khz() which may be stale.
To prevent that from happening, modify arch_freq_get_on_cpu() to
call aperfmperf_snapshot_khz() twice, with a short delay between
these calls, if the previous invocation of aperfmperf_snapshot_khz()
was too far back in the past (specifically, more that 1s ago).
Also, as pointed out by Doug Smythies, aperf_delta is limited now
and the multiplication of it by cpu_khz won't overflow, so simplify
the s->khz computations too.
Fixes: f8475cef9008 "x86: use common aperfmperf_khz_on_cpu() to calculate KHz using APERF/MPERF" Reported-by: Doug Smythies <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
Daniel Borkmann [Fri, 28 Jul 2017 15:05:25 +0000 (17:05 +0200)]
bpf: fix bpf_prog_get_info_by_fd to dump correct xlated_prog_len
bpf_prog_size(prog->len) is not the correct length we want to dump
back to user space. The code in bpf_prog_get_info_by_fd() uses this
to copy prog->insnsi to user space, but bpf_prog_size(prog->len) also
includes the size of struct bpf_prog itself plus program instructions
and is usually used either in context of accounting or for bpf_prog_alloc()
et al, thus we copy out of bounds in bpf_prog_get_info_by_fd()
potentially. Use the correct bpf_prog_insn_size() instead.
Fixes: 1e2709769086 ("bpf: Add BPF_OBJ_GET_INFO_BY_FD") Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Martin KaFai Lau <[email protected]> Signed-off-by: David S. Miller <[email protected]>
When using CONFIG_UBSAN_SANITIZE_ALL, the TCP code produces a
false-positive warning:
net/ipv4/tcp_output.c: In function 'tcp_connect':
net/ipv4/tcp_output.c:2207:40: error: array subscript is below array bounds [-Werror=array-bounds]
tp->chrono_stat[tp->chrono_type - 1] += now - tp->chrono_start;
^~
net/ipv4/tcp_output.c:2207:40: error: array subscript is below array bounds [-Werror=array-bounds]
tp->chrono_stat[tp->chrono_type - 1] += now - tp->chrono_start;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
I have opened a gcc bug for this, but distros have already shipped
compilers with this problem, and it's not clear yet whether there is
a way for gcc to avoid the warning. As the problem is related to the
bitfield access, this introduces a temporary variable to store the old
enum value.
I did not notice this warning earlier, since UBSAN is disabled when
building with COMPILE_TEST, and that was always turned on in both
allmodconfig and randconfig tests.
Daniel Borkmann [Thu, 27 Jul 2017 19:02:46 +0000 (21:02 +0200)]
bpf: don't indicate success when copy_from_user fails
err in bpf_prog_get_info_by_fd() still holds 0 at that time from prior
check_uarg_tail_zero() check. Explicitly return -EFAULT instead, so
user space can be notified of buggy behavior.
Fixes: 1e2709769086 ("bpf: Add BPF_OBJ_GET_INFO_BY_FD") Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Martin KaFai Lau <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Paolo Abeni [Thu, 27 Jul 2017 12:45:09 +0000 (14:45 +0200)]
udp6: fix socket leak on early demux
When an early demuxed packet reaches __udp6_lib_lookup_skb(), the
sk reference is retrieved and used, but the relevant reference
count is leaked and the socket destructor is never called.
Beyond leaking the sk memory, if there are pending UDP packets
in the receive queue, even the related accounted memory is leaked.
In the long run, this will cause persistent forward allocation errors
and no UDP skbs (both ipv4 and ipv6) will be able to reach the
user-space.
Fix this by explicitly accessing the early demux reference before
the lookup, and properly decreasing the socket reference count
after usage.
Also drop the skb_steal_sock() in __udp6_lib_lookup_skb(), and
the now obsoleted comment about "socket cache".
The newly added code is derived from the current ipv4 code for the
similar path.
v1 -> v2:
fixed the __udp6_lib_rcv() return code for resubmission,
as suggested by Eric
net: thunderx: Fix BGX transmit stall due to underflow
For SGMII/RGMII/QSGMII interfaces when physical link goes down
while traffic is high is resulting in underflow condition being set
on that specific BGX's LMAC. Which assets a backpresure and VNIC stops
transmitting packets.
This is due to BGX being disabled in link status change callback while
packet is in transit. This patch fixes this issue by not disabling BGX
but instead just disables packet Rx and Tx.
Jason Wang [Thu, 27 Jul 2017 03:22:05 +0000 (11:22 +0800)]
Revert "vhost: cache used event for better performance"
This reverts commit 809ecb9bca6a9424ccd392d67e368160f8b76c92. Since it
was reported to break vhost_net. We want to cache used event and use
it to check for notification. The assumption was that guest won't move
the event idx back, but this could happen in fact when 16 bit index
wraps around after 64K entries.
WANG Cong [Wed, 26 Jul 2017 22:22:07 +0000 (15:22 -0700)]
team: use a larger struct for mac address
IPv6 tunnels use sizeof(struct in6_addr) as dev->addr_len,
but in many places especially bonding, we use struct sockaddr
to copy and set mac addr, this could lead to stack out-of-bounds
access.
Fix it by using a larger address storage like bonding.
WANG Cong [Wed, 26 Jul 2017 22:22:06 +0000 (15:22 -0700)]
net: check dev->addr_len for dev_set_mac_address()
Historically, dev_ifsioc() uses struct sockaddr as mac
address definition, this is why dev_set_mac_address()
accepts a struct sockaddr pointer as input but now we
have various types of mac addresse whose lengths
are up to MAX_ADDR_LEN, longer than struct sockaddr,
and saved in dev->addr_len.
It is too late to fix dev_ifsioc() due to API
compatibility, so just reject those larger than
sizeof(struct sockaddr), otherwise we would read
and use some random bytes from kernel stack.
Fortunately, only a few IPv6 tunnel devices have addr_len
larger than sizeof(struct sockaddr) and they don't support
ndo_set_mac_addr(). But with team driver, in lb mode, they
can still be enslaved to a team master and make its mac addr
length as the same.
ARM: shmobile: rcar-gen2: Fix deadlock in regulator quirk
Simon Horman reported that Koelsch and Lager hang during boot, and
bisected this to commit 1c3c5eab171590f8 ("sched/core: Enable
might_sleep() and smp_processor_id() checks early").
The da9063/da9210 regulator quirk for R-Car Gen2 boards uses a bus
notifier, and unregisters the notifier when it is no longer needed.
However, a notifier must not be unregistered from within the call chain.
This bug went unnoticed, as blocking_notifier_chain_unregister() didn't
take the semaphore during early boot. The aforementioned commit changed
that behavior, leading to a deadlock.
Fix this by removing the call to bus_unregister_notifier(), and keeping
local completion state instead.
Merge tag 'devicetree-fixes-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree fixes from Rob Herring:
"Two small DT fixes:
- Fix error handling in of_irq_to_resource_table() due to
of_irq_to_resource() error return changes.
- Fix dtx_diff script due to dts include path changes"
* tag 'devicetree-fixes-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
of: irq: fix of_irq_to_resource() error check
scripts/dtc: dtx_diff - update include dts paths to match build
Merge tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client fixes from Anna Schumaker:
"More NFS client bugfixes for 4.13.
Most of these fix locking bugs that Ben and Neil noticed, but I also
have a patch to fix one more access bug that was reported after last
week.
Stable fixes:
- Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
- Invalidate file size when taking a lock to prevent corruption
Other fixes:
- Don't excessively generate tiny writes with fallocate
- Use the raw NFS access mask in nfs4_opendata_access()"
* tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
NFS: Optimize fallocate by refreshing mapping when needed.
NFS: invalidate file size when taking a lock.
NFS: Use raw NFS access mask in nfs4_opendata_access()
Merge tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
- fix firstfsb variables that we left uninitialized, which could lead
to locking problems.
- check for NULL metadata buffer pointers before using them.
- don't allow btree cursor manipulation if the btree block is corrupt.
Better to just shut down.
- fix infinite loop problems in quotacheck.
- fix buffer overrun when validating directory blocks.
- fix deadlock problem in bunmapi.
* tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix multi-AG deadlock in xfs_bunmapi
xfs: check that dir block entries don't off the end of the buffer
xfs: fix quotacheck dquot id overflow infinite loop
xfs: check _alloc_read_agf buffer pointer before using
xfs: set firstfsb to NULLFSBLOCK before feeding it to _bmapi_write
xfs: check _btree_check_block value
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"s390:
- SRCU fix
PPC:
- host crash fixes
x86:
- bugfixes, including making nested posted interrupts really work
Generic:
- tweaks to kvm_stat and to uevents"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: LAPIC: Fix reentrancy issues with preempt notifiers
tools/kvm_stat: add '-f help' to get the available event list
tools/kvm_stat: use variables instead of hard paths in help output
KVM: nVMX: Fix loss of L2's NMI blocking state
KVM: nVMX: Fix posted intr delivery when vcpu is in guest mode
x86: irq: Define a global vector for nested posted interrupts
KVM: x86: do mask out upper bits of PAE CR3
KVM: make pid available for uevents without debugfs
KVM: s390: take srcu lock when getting/setting storage keys
KVM: VMX: remove unused field
KVM: PPC: Book3S HV: Fix host crash on changing HPT size
KVM: PPC: Book3S HV: Enable TM before accessing TM registers
Merge tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"Three minor cleanups for xen related drivers"
* tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: dont fiddle with event channel masking in suspend/resume
xen: selfballoon: remove unnecessary static in frontswap_selfshrink()
xen: Drop un-informative message during boot
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"I'd been collecting these whilst we debugged a CPU hotplug failure,
but we ended up diagnosing that one to tglx, who has taken a fix via
the -tip tree separately.
We're seeing some NFS issues that we haven't gotten to the bottom of
yet, and we've uncovered some issues with our backtracing too so there
might be another fixes pull before we're done.
Summary:
- Ensure we have a guard page after the kernel image in vmalloc
- Fix incorrect prefetch stride in copy_page
- Ensure irqs are disabled in die()
- Fix for event group validation in QCOM L2 PMU driver
- Fix requesting of PMU IRQs on AMD Seattle
- Minor cleanups and fixes"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: mmu: Place guard page after mapping of kernel image
drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU
arm64: sysreg: Fix unprotected macro argmuent in write_sysreg
perf: qcom_l2: fix column exclusion check
arm64/lib: copy_page: use consistent prefetch stride
arm64/numa: Drop duplicate message
perf: Convert to using %pOF instead of full_name
arm64: Convert to using %pOF instead of full_name
arm64: traps: disable irq in die()
arm64: atomics: Remove '&' from '+&' asm constraint in lse atomics
arm64: uaccess: Remove redundant __force from addr cast in __range_ok
Merge tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"The highlight is Ben's patch to work around a host killing bug when
running KVM guests with the Radix MMU on Power9. See the long change
log of that commit for more detail.
And then three fairly minor fixes:
- fix of_node_put() underflow during reconfig remove, using old DLPAR
tools.
- fix recently introduced ld version check with 64-bit LE-only
toolchain.
- free the subpage_prot_table correctly, avoiding a memory leak.
Thanks to: Aneesh Kumar K.V, Benjamin Herrenschmidt, Laurent Vivier"
* tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm/hash: Free the subpage_prot_table correctly
powerpc/Makefile: Fix ld version check with 64-bit LE-only toolchain
powerpc/pseries: Fix of_node_put() underflow during reconfig remove
powerpc/mm/radix: Workaround prefetch issue with KVM
NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
nfs4_retry_setlk() sets the task's state to TASK_INTERRUPTIBLE within the
same region protected by the wait_queue's lock after checking for a
notification from CB_NOTIFY_LOCK callback. However, after releasing that
lock, a wakeup for that task may race in before the call to
freezable_schedule_timeout_interruptible() and set TASK_WAKING, then
freezable_schedule_timeout_interruptible() will set the state back to
TASK_INTERRUPTIBLE before the task will sleep. The result is that the task
will sleep for the entire duration of the timeout.
Since we've already set TASK_INTERRUPTIBLE in the locked section, just use
freezable_schedule_timout() instead.
Merge branch 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"Fixes addressing problems reported by users, and there's one more
regression fix"
* 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: round down size diff when shrinking/growing device
Btrfs: fix early ENOSPC due to delalloc
btrfs: fix lockup in find_free_extent with read-only block groups
Btrfs: fix dir item validation when replaying xattr deletes
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Pull MD fixes from Shaohua Li:
"This fixes several bugs, three of them are marked for stable:
- an initialization issue fixed by Ming
- a bio clone race issue fixed by me
- an async tx flush issue fixed by Ofer
- other cleanups"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
MD: fix warnning for UP case
md/raid5: add thread_group worker async_tx_issue_pending_all
md: simplify code with bio_io_error
md/raid1: fix writebehind bio clone
md: raid1-10: move raid1/raid10 common code into raid1-10.c
md: raid1/raid10: initialize bvec table via bio_add_page()
md: remove 'idx' from 'struct resync_pages'
Merge tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- a few DM integrity fixes that improve performance. One that address
inefficiencies in the on-disk journal device layout. Another that
makes use of the block layer's on-stack plugging when writing the
journal.
- a dm-bufio fix for the blk_status_t conversion that went in during
the merge window.
- a few DM raid fixes that address correctness when suspending the
device and a validation fix for validation that occurs during device
activation.
- a couple DM zoned target fixes. Important one being the fix to not
use GFP_KERNEL in the IO path due to concerns about deadlock in
low-memory conditions (e.g. swap over a DM zoned device, etc).
- a DM DAX device fix to make sure dm_dax_flush() is called if the
underlying DAX device is operating as a write cache.
* tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm, dax: Make sure dm_dax_flush() is called if device supports it
dm verity fec: fix GFP flags used with mempool_alloc()
dm zoned: use GFP_NOIO in I/O path
dm zoned: remove test for impossible REQ_OP_FLUSH conditions
dm raid: bump target version
dm raid: avoid mddev->suspended access
dm raid: fix activation check in validate_raid_redundancy()
dm raid: remove WARN_ON() in raid10_md_layout_to_format()
dm bufio: fix error code in dm_bufio_write_dirty_buffers()
dm integrity: test for corrupted disk format during table load
dm integrity: WARN_ON if variables representing journal usage get out of sync
dm integrity: use plugging when writing the journal
dm integrity: fix inefficient allocation of journal space
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"A small collection of fixes that should go into this series. This
contains:
- NVMe pull request from Christoph, with various fixes for nvme
proper and nvme-fc.
- disable runtime PM for blk-mq for now.
With scsi now defaulting to using blk-mq, this reared its head as
an issue. Longer term we'll fix up runtime PM for blk-mq, for now
just disable it to prevent a hang on laptop resume for some folks.
- blk-mq CPU <-> hw queue map fix from Christoph.
- xen/blkfront pull request from Konrad, with two small fixes for the
blkfront driver.
- a few fixups for nbd from Joseph.
- a stable fix for pblk from Javier"
* 'for-linus' of git://git.kernel.dk/linux-block:
lightnvm: pblk: advance bio according to lba index
nvme: validate admin queue before unquiesce
nbd: clear disconnected on reconnect
nvme-pci: fix HMB size calculation
nvme-fc: revise TRADDR parsing
nvme-fc: address target disconnect race conditions in fcp io submit
nvme: fabrics commands should use the fctype field for data direction
nvme: also provide a UUID in the WWID sysfs attribute
xen/blkfront: always allocate grants first from per-queue persistent grants
xen-blkfront: fix mq start/stop race
blk-mq: map queues to all present CPUs
block: disable runtime-pm for blk-mq
xen-blkfront: Fix handling of non-supported operations
nbd: only set sndtimeo if we have a timeout set
nbd: take tx_lock before disconnecting
nbd: allow multiple disconnects to be sent
Merge tag 'mmc-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"Here are a couple of mmc fixes intended for v4.13-rc1.
I have also included a couple of cleanup patches in this pull request
for OMAP2+, related to the omap_hsmmc driver. The reason is because of
the changes are also depending on OMAP SoC specific code, so this
simplifies how to deal with this.
Summary:
MMC host:
- sunxi: Correct time phase settings
- omap_hsmmc: Clean up some dead code
- dw_mmc: Fix message printed for deprecated num-slots DT binding
- dw_mmc: Fix DT documentation"
* tag 'mmc-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
Documentation: dw-mshc: deprecate num-slots
mmc: dw_mmc: fix the wrong condition check of getting num-slots from DT
mmc: host: omap_hsmmc: remove unused platform callbacks
ARM: OMAP2+: hsmmc.c: Remove dead code
mmc: sunxi: Keep default timing phase settings for new timing mode
workqueue: Work around edge cases for calc of pool's cpumask
There is an underlying assumption/trade-off in many layers of the Linux
system that CPU <-> node mapping is static. This is despite the presence
of features like NUMA and 'hotplug' that support the dynamic addition/
removal of fundamental system resources like CPUs and memory. PowerPC
systems, however, do provide extensive features for the dynamic change
of resources available to a system.
Currently, there is little or no synchronization protection around the
updating of the CPU <-> node mapping, and the export/update of this
information for other layers / modules. In systems which can change
this mapping during 'hotplug', like PowerPC, the information is changing
underneath all layers that might reference it.
This patch attempts to ensure that a valid, usable cpumask attribute
is used by the workqueue infrastructure when setting up new resource
pools. It prevents a crash that has been observed when an 'empty'
cpumask is passed along to the worker/task scheduling code. It is
intended as a temporary workaround until a more fundamental review and
correction of the issue can be done.
[With additions to the patch provided by Tejun Hao <[email protected]>]
Javier González [Fri, 28 Jul 2017 13:13:16 +0000 (15:13 +0200)]
lightnvm: pblk: advance bio according to lba index
When a lba either hits the cache or corresponds to an empty entry in the
L2P table, we need to advance the bio according to the position in which
the lba is located. Otherwise, we will copy data in the wrong page, thus
causing data corruption for the application.
In case of a cache hit, we assumed that bio->bi_iter.bi_idx would
contain the correct index, but this is no necessarily true. Instead, use
the local bio advance counter and iterator. This guarantees that lbas
hitting the cache are copied into the right bv_page.
In case of an empty L2P entry, we omitted to advance the bio. In the
cases when the same I/O also contains a cache hit, data corresponding
to this lba will be copied to the wrong bv_page. Fix this by advancing
the bio as we do in the case of a cache hit.
powerpc/powernv/pci: Return failure for some uses of dma_set_mask()
Commit 8e3f1b1d8255 ("powerpc/powernv/pci: Enable 64-bit devices to access
>4GB DMA space") introduced the ability for PCI device drivers to request a
DMA mask between 64 and 32 bits and actually get a mask greater than
32-bits. However currently if certain machine configuration dependent
conditions are not meet the code silently falls back to a 32-bit mask.
This makes it hard for device drivers to detect which mask they actually
got. Instead we should return an error when the request could not be
fulfilled which allows drivers to either fallback or implement other
workarounds as documented in DMA-API-HOWTO.txt.
ASoC: Intel: Use MCLK instead of BLCK as the sysclock for RT5514 codec on kabylake platform
This patch fixes the pop noise in dmic recording using rt5514 on kabylake platform.
This patch enables the rt5514 to use MCLK instead of BLCK as the sysclock which fixes
the pop noise.
ASoC: Intel: Enabling ASRC for RT5663 codec on kabylake platform
This patch fixes the cracking noise in rt5663 headphones for kabylake platform
by calling rt5663_sel_asrc_clk_src() for RT5663_AD_STEREO_FILTER to set ASRC.
The ASRC function is for asynchronous MCLK and LRCK. For RT5663 ASRC should be
enabled to support special i2s clock format like Intel's 100fs.
ASRC function will track i2s clock and generate a corresponding
system clock for codec. Calling this function helps select the clock source
for both RT5663_AD_STEREO_FILTER and RT5663_DA_STEREO_FILTER filters
which fixes the crackling sound.
Michael Ellerman [Wed, 26 Jul 2017 13:19:04 +0000 (23:19 +1000)]
powerpc/boot: Fix 64-bit boot wrapper build with non-biarch compiler
Historically the boot wrapper was always built 32-bit big endian, even
for 64-bit kernels. That was because old firmwares didn't necessarily
support booting a 64-bit image. Because of that arch/powerpc/boot/Makefile
uses CROSS32CC for compilation.
However when we added 64-bit little endian support, we also added
support for building the boot wrapper 64-bit. However we kept using
CROSS32CC, because in most cases it is just CC and everything works.
However if the user doesn't specify CROSS32_COMPILE (which no one ever
does AFAIK), and CC is *not* biarch (32/64-bit capable), then CROSS32CC
becomes just "gcc". On native systems that is probably OK, but if we're
cross building it definitely isn't, leading to eg:
To fix it, stop using CROSS32CC, because we may or may not be building
32-bit. Instead setup a BOOTCC, which defaults to CC, and only use
CROSS32_COMPILE if it's set and we're building for 32-bit.
Fixes: 147c05168fc8 ("powerpc/boot: Add support for 64bit little endian wrapper") Signed-off-by: Michael Ellerman <[email protected]> Reviewed-by: Cyril Bur <[email protected]>
Michael Ellerman [Thu, 27 Jul 2017 13:23:37 +0000 (23:23 +1000)]
powerpc/smp: Call smp_ops->setup_cpu() directly on the boot CPU
In smp_cpus_done() we need to call smp_ops->setup_cpu() for the boot
CPU, which means it has to run *on* the boot CPU.
In the past we ensured it ran on the boot CPU by changing the CPU
affinity mask of current directly. That was removed in commit 6d11b87d55eb ("powerpc/smp: Replace open coded task affinity logic"),
and replaced with a work queue call.
Unfortunately using a work queue leads to a lockdep warning, now that
the CPU hotplug lock is a regular semaphore:
======================================================
WARNING: possible circular locking dependency detected
...
kworker/0:1/971 is trying to acquire lock:
(cpu_hotplug_lock.rw_sem){++++++}, at: [<c000000000100974>] apply_workqueue_attrs+0x34/0xa0
but task is already holding lock:
((&wfc.work)){+.+.+.}, at: [<c0000000000fdb2c>] process_one_work+0x25c/0x800
...
CPU0 CPU1
---- ----
lock((&wfc.work));
lock(cpu_hotplug_lock.rw_sem);
lock((&wfc.work));
lock(cpu_hotplug_lock.rw_sem);
Although the deadlock can't happen in practice, because
smp_cpus_done() only runs in early boot before CPU hotplug is allowed,
lockdep can't tell that.
Luckily in commit 8fb12156b8db ("init: Pin init task to the boot CPU,
initially") tglx changed the generic code to pin init to the boot CPU
to begin with. The unpinning of init from the boot CPU happens in
sched_init_smp(), which is called after smp_cpus_done().
So smp_cpus_done() is always called on the boot CPU, which means we
don't need the work queue call at all - and the lockdep warning goes
away.
Will Deacon [Mon, 24 Jul 2017 10:46:09 +0000 (11:46 +0100)]
arm64: mmu: Place guard page after mapping of kernel image
The vast majority of virtual allocations in the vmalloc region are followed
by a guard page, which can help to avoid overruning on vma into another,
which may map a read-sensitive device.
This patch adds a guard page to the end of the kernel image mapping (i.e.
following the data/bss segments).
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