This is a note to let you know that I've just added the patch titled [PATCH stable 5.8 20/25] r8169: fix operation under forced interrupt threading to the 5.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: r8169-fix-operation-under-forced-interrupt-threading.patch and it can be found in the queue-5.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Sat Oct 24 10:56:27 AM CEST 2020 From: Heiner Kallweit <hkallweit1@xxxxxxxxx> Date: Sun, 18 Oct 2020 18:38:59 +0200 Subject: [PATCH stable 5.8 20/25] r8169: fix operation under forced interrupt threading From: Heiner Kallweit <hkallweit1@xxxxxxxxx> [ Upstream commit 424a646e072a887aa87283b53aa6f8b19c2a7bef ] 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@xxxxxxxxx> Link: https://lore.kernel.org/r/4d3ef84a-c812-5072-918a-22a6f6468310@xxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/realtek/r8169_main.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -4675,7 +4675,7 @@ static int rtl8169_close(struct net_devi 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); @@ -4726,8 +4726,8 @@ static int rtl_open(struct net_device *d 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; @@ -4759,7 +4759,7 @@ out: 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); Patches currently in stable-queue which might be from hkallweit1@xxxxxxxxx are queue-5.8/r8169-fix-data-corruption-issue-on-rtl8402.patch queue-5.8/r8169-fix-operation-under-forced-interrupt-threading.patch