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
