net: txgbe: remove separate irq request for MSI and INTx

When using MSI or INTx interrupts, request_irq() for pdev->irq will
conflict with request_threaded_irq() for txgbe->misc.irq, to cause
system crash. So remove txgbe_request_irq() for MSI/INTx case, and
rename txgbe_request_msix_irqs() since it only request for queue irqs.

Add wx->misc_irq_domain to determine whether the driver creates an IRQ
domain and threaded request the IRQs.

Fixes: aefd013624a1 ("net: txgbe: use irq_domain for interrupt controller")
Signed-off-by: Jiawen Wu <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
index 7c4b6881a93fc2bb8edd987aa119edf732814572..d1b682ce9c6db1db2eb9318f3e6108f797d6d9db 100644 (file)
--- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -1959,6 +1959,7 @@ int wx_sw_init(struct wx *wx)
        }
 
        bitmap_zero(wx->state, WX_STATE_NBITS);
+       wx->misc_irq_domain = false;
 
        return 0;
 }

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_lib.c b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
index f53776877f713046aaa5038e0305e195f2053a13..e1f514b210901e5eb37506b271c65f6f8c4520a1 100644 (file)
--- a/drivers/net/ethernet/wangxun/libwx/wx_lib.c
+++ b/drivers/net/ethernet/wangxun/libwx/wx_lib.c
@@ -1997,7 +1997,8 @@ void wx_free_irq(struct wx *wx)
        int vector;
 
        if (!(pdev->msix_enabled)) {
-               free_irq(pdev->irq, wx);
+               if (!wx->misc_irq_domain)
+                       free_irq(pdev->irq, wx);
                return;
        }
 
@@ -2012,7 +2013,7 @@ void wx_free_irq(struct wx *wx)
                free_irq(entry->vector, q_vector);
        }
 
-       if (wx->mac.type == wx_mac_em)
+       if (!wx->misc_irq_domain)
                free_irq(wx->msix_entry->vector, wx);
 }
 EXPORT_SYMBOL(wx_free_irq);

diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h
index 5aaf7b1fa2db9ca15a075ce7d162cd025f107ed4..0df7f5712b6f71a7087e6fa0fc157ac175bee8f9 100644 (file)
--- a/drivers/net/ethernet/wangxun/libwx/wx_type.h
+++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h
@@ -1058,6 +1058,7 @@ struct wx {
        dma_addr_t isb_dma;
        u32 *isb_mem;
        u32 isb_tag[WX_ISB_MAX];
+       bool misc_irq_domain;
 
 #define WX_MAX_RETA_ENTRIES 128
 #define WX_RSS_INDIR_TBL_MAX 64

diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.c
index b3e3605d1edb36bf5b6efd8f217d55654d946f54..1490fd6ddbdf94dd8d14a0713d67a9c5e56689cb 100644 (file)
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.c
@@ -27,57 +27,19 @@ void txgbe_irq_enable(struct wx *wx, bool queues)
 }
 
 /**
- * txgbe_intr - msi/legacy mode Interrupt Handler
- * @irq: interrupt number
- * @data: pointer to a network interface device structure
- **/
-static irqreturn_t txgbe_intr(int __always_unused irq, void *data)
-{
-       struct wx_q_vector *q_vector;
-       struct wx *wx  = data;
-       struct pci_dev *pdev;
-       u32 eicr;
-
-       q_vector = wx->q_vector[0];
-       pdev = wx->pdev;
-
-       eicr = wx_misc_isb(wx, WX_ISB_VEC0);
-       if (!eicr) {
-               /* shared interrupt alert!
-                * the interrupt that we masked before the ICR read.
-                */
-               if (netif_running(wx->netdev))
-                       txgbe_irq_enable(wx, true);
-               return IRQ_NONE;        /* Not our interrupt */
-       }
-       wx->isb_mem[WX_ISB_VEC0] = 0;
-       if (!(pdev->msi_enabled))
-               wr32(wx, WX_PX_INTA, 1);
-
-       wx->isb_mem[WX_ISB_MISC] = 0;
-       /* would disable interrupts here but it is auto disabled */
-       napi_schedule_irqoff(&q_vector->napi);
-
-       /* re-enable link(maybe) and non-queue interrupts, no flush.
-        * txgbe_poll will re-enable the queue interrupts
-        */
-       if (netif_running(wx->netdev))
-               txgbe_irq_enable(wx, false);
-
-       return IRQ_HANDLED;
-}
-
-/**
- * txgbe_request_msix_irqs - Initialize MSI-X interrupts
+ * txgbe_request_queue_irqs - Initialize MSI-X queue interrupts
  * @wx: board private structure
  *
- * Allocate MSI-X vectors and request interrupts from the kernel.
+ * Allocate MSI-X queue vectors and request interrupts from the kernel.
  **/
-static int txgbe_request_msix_irqs(struct wx *wx)
+int txgbe_request_queue_irqs(struct wx *wx)
 {
        struct net_device *netdev = wx->netdev;
        int vector, err;
 
+       if (!wx->pdev->msix_enabled)
+               return 0;
+
        for (vector = 0; vector < wx->num_q_vectors; vector++) {
                struct wx_q_vector *q_vector = wx->q_vector[vector];
                struct msix_entry *entry = &wx->msix_q_entries[vector];
@@ -110,34 +72,6 @@ free_queue_irqs:
        return err;
 }
 
-/**
- * txgbe_request_irq - initialize interrupts
- * @wx: board private structure
- *
- * Attempt to configure interrupts using the best available
- * capabilities of the hardware and kernel.
- **/
-int txgbe_request_irq(struct wx *wx)
-{
-       struct net_device *netdev = wx->netdev;
-       struct pci_dev *pdev = wx->pdev;
-       int err;
-
-       if (pdev->msix_enabled)
-               err = txgbe_request_msix_irqs(wx);
-       else if (pdev->msi_enabled)
-               err = request_irq(wx->pdev->irq, &txgbe_intr, 0,
-                                 netdev->name, wx);
-       else
-               err = request_irq(wx->pdev->irq, &txgbe_intr, IRQF_SHARED,
-                                 netdev->name, wx);
-
-       if (err)
-               wx_err(wx, "request_irq failed, Error %d\n", err);
-
-       return err;
-}
-
 static int txgbe_request_gpio_irq(struct txgbe *txgbe)
 {
        txgbe->gpio_irq = irq_find_mapping(txgbe->misc.domain, TXGBE_IRQ_GPIO);
@@ -256,6 +190,8 @@ int txgbe_setup_misc_irq(struct txgbe *txgbe)
        if (err)
                goto free_gpio_irq;
 
+       wx->misc_irq_domain = true;
+
        return 0;
 
 free_gpio_irq:

diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.h b/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.h
index b77945e7a0f262b66448ca0c2d49ac6355475b92..e6285b94625eae5d61d3d7183714a8e330ea52b7 100644 (file)
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.h
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_irq.h
@@ -2,6 +2,6 @@
 /* Copyright (c) 2015 - 2024 Beijing WangXun Technology Co., Ltd. */
 
 void txgbe_irq_enable(struct wx *wx, bool queues);
-int txgbe_request_irq(struct wx *wx);
+int txgbe_request_queue_irqs(struct wx *wx);
 void txgbe_free_misc_irq(struct txgbe *txgbe);
 int txgbe_setup_misc_irq(struct txgbe *txgbe);

diff --git a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
index 8c7a74981b907fc3eed08d993a89f7e6ab4a456b..76b5672c0a1774b89399bc4ef67896dcf000f783 100644 (file)
--- a/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
+++ b/drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
@@ -294,7 +294,7 @@ static int txgbe_open(struct net_device *netdev)
 
        wx_configure(wx);
 
-       err = txgbe_request_irq(wx);
+       err = txgbe_request_queue_irqs(wx);
        if (err)
                goto err_free_isb;