From 424a646e072a887aa87283b53aa6f8b19c2a7bef Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sun, 18 Oct 2020 18:38:59 +0200
Subject: [PATCH] r8169: fix operation under forced interrupt threading
Git-commit: 424a646e072a887aa87283b53aa6f8b19c2a7bef
Patch-mainline: v5.10-rc1
References: git-fixes
For several network drivers it was reported that using
__napi_schedule_irqoff() is unsafe with forced threading. One way to
fix this is switching back to __napi_schedule, but then we lose the
benefit of the irqoff version in general. As stated by Eric it doesn't
make sense to make the minimal hard irq handlers in drivers using NAPI
a thread. Therefore ensure that the hard irq handler is never
thread-ified.
Fixes: 9a899a35b0d6 ("r8169: switch to napi_schedule_irqoff")
Link: https://lkml.org/lkml/2020/10/18/19
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/4d3ef84a-c812-5072-918a-22a6f6468310@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/ethernet/realtek/r8169_main.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 7d366b0362cb..3b6ddc706e92 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -4694,7 +4694,7 @@ static int rtl8169_close(struct net_device *dev)
phy_disconnect(tp->phydev);
- pci_free_irq(pdev, 0, tp);
+ free_irq(pci_irq_vector(pdev, 0), tp);
dma_free_coherent(&pdev->dev, R8169_RX_RING_BYTES, tp->RxDescArray,
tp->RxPhyAddr);
@@ -4745,8 +4745,8 @@ static int rtl_open(struct net_device *dev)
rtl_request_firmware(tp);
- retval = pci_request_irq(pdev, 0, rtl8169_interrupt, NULL, tp,
- dev->name);
+ retval = request_irq(pci_irq_vector(pdev, 0), rtl8169_interrupt,
+ IRQF_NO_THREAD | IRQF_SHARED, dev->name, tp);
if (retval < 0)
goto err_release_fw_2;
@@ -4763,7 +4763,7 @@ static int rtl_open(struct net_device *dev)
return retval;
err_free_irq:
- pci_free_irq(pdev, 0, tp);
+ free_irq(pci_irq_vector(pdev, 0), tp);
err_release_fw_2:
rtl_release_firmware(tp);
rtl8169_rx_clear(tp);
--
2.16.4