firmware: arm_scmi: Make raw debugfs entries non-seekable

SCMI raw debugfs entries are used to inject and snoop messages out of the
SCMI core and, as such, the underlying virtual files have no reason to
support seeking.

Modify the related file_operations descriptors to be non-seekable.

Fixes: 3c3d818a9317 ("firmware: arm_scmi: Add core raw transmission support")
Signed-off-by: Cristian Marussi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sudeep Holla <[email protected]>

diff --git a/drivers/firmware/arm_scmi/raw_mode.c b/drivers/firmware/arm_scmi/raw_mode.c
index 350573518503355f6abaa4d24cbcac6368e8930c..130d13e9cd6beb93498469fae489b05e5ba1dfab 100644 (file)
--- a/drivers/firmware/arm_scmi/raw_mode.c
+++ b/drivers/firmware/arm_scmi/raw_mode.c
@@ -921,7 +921,7 @@ static int scmi_dbg_raw_mode_open(struct inode *inode, struct file *filp)
        rd->raw = raw;
        filp->private_data = rd;
 
-       return 0;
+       return nonseekable_open(inode, filp);
 }
 
 static int scmi_dbg_raw_mode_release(struct inode *inode, struct file *filp)
@@ -950,6 +950,7 @@ static const struct file_operations scmi_dbg_raw_mode_reset_fops = {
        .open = scmi_dbg_raw_mode_open,
        .release = scmi_dbg_raw_mode_release,
        .write = scmi_dbg_raw_mode_reset_write,
+       .llseek = no_llseek,
        .owner = THIS_MODULE,
 };
 
@@ -959,6 +960,7 @@ static const struct file_operations scmi_dbg_raw_mode_message_fops = {
        .read = scmi_dbg_raw_mode_message_read,
        .write = scmi_dbg_raw_mode_message_write,
        .poll = scmi_dbg_raw_mode_message_poll,
+       .llseek = no_llseek,
        .owner = THIS_MODULE,
 };
 
@@ -975,6 +977,7 @@ static const struct file_operations scmi_dbg_raw_mode_message_async_fops = {
        .read = scmi_dbg_raw_mode_message_read,
        .write = scmi_dbg_raw_mode_message_async_write,
        .poll = scmi_dbg_raw_mode_message_poll,
+       .llseek = no_llseek,
        .owner = THIS_MODULE,
 };
 
@@ -998,6 +1001,7 @@ static const struct file_operations scmi_dbg_raw_mode_notification_fops = {
        .release = scmi_dbg_raw_mode_release,
        .read = scmi_test_dbg_raw_mode_notif_read,
        .poll = scmi_test_dbg_raw_mode_notif_poll,
+       .llseek = no_llseek,
        .owner = THIS_MODULE,
 };
 
@@ -1021,6 +1025,7 @@ static const struct file_operations scmi_dbg_raw_mode_errors_fops = {
        .release = scmi_dbg_raw_mode_release,
        .read = scmi_test_dbg_raw_mode_errors_read,
        .poll = scmi_test_dbg_raw_mode_errors_poll,
+       .llseek = no_llseek,
        .owner = THIS_MODULE,
 };