From 4939183bb28c209bdb81508c18994a8459103569 Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Thu, 29 Oct 2020 10:18:53 +0100 Subject: [PATCH] r8169: fix issue with forced threading in combination with shared interrupts [ Upstream commit 2734a24e6e5d18522fbf599135c59b82ec9b2c9e ] As reported by Serge flag IRQF_NO_THREAD causes an error if the interrupt is actually shared and the other driver(s) don't have this flag set. This situation can occur if a PCI(e) legacy interrupt is used in combination with forced threading. There's no good way to deal with this properly, therefore we have to remove flag IRQF_NO_THREAD. For fixing the original forced threading issue switch to napi_schedule(). Fixes: 424a646e072a ("r8169: fix operation under forced interrupt threading") Link: https://www.spinics.net/lists/netdev/msg694960.html Reported-by: Serge Belyshev Signed-off-by: Heiner Kallweit Tested-by: Serge Belyshev Link: https://lore.kernel.org/r/b5b53bfe-35ac-3768-85bf-74d1290cf394@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/realtek/r8169_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index f838abdb35e1..d8881ba773de 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -6264,7 +6264,7 @@ static irqreturn_t rtl8169_interrupt(int irq, void *dev_instance) } rtl_irq_disable(tp); - napi_schedule_irqoff(&tp->napi); + napi_schedule(&tp->napi); out: rtl_ack_events(tp, status); @@ -6470,7 +6470,7 @@ static int rtl_open(struct net_device *dev) rtl_request_firmware(tp); retval = request_irq(pci_irq_vector(pdev, 0), rtl8169_interrupt, - IRQF_NO_THREAD | IRQF_SHARED, dev->name, tp); + IRQF_SHARED, dev->name, tp); if (retval < 0) goto err_release_fw_2;