From: Stanislaw Gruszka Date: Wed, 16 Nov 2011 12:58:42 +0000 (+0100) Subject: rt2x00: handle spurious pci interrupts X-Git-Tag: MMI-PSA29.97-13-9~17773^2^2~39 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=23085d5796561625db4143a671f1de081f66ef08;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git rt2x00: handle spurious pci interrupts We have documented case of very bad performance issue on rt2800pci device, because it generate spurious interrupt, what cause irq line is disabled: https://bugzilla.redhat.com/show_bug.cgi?id=658451 We already address that problem in separate patch by returning IRQ_HANDLED from interrupt handler. We think similar fix is needed for other rt2x00 PCI devices, because users report performance problems on these devices too. Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka Acked-by: Ivo van Doorn Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c index 3a6b40239bc1..676c7657f5f5 100644 --- a/drivers/net/wireless/rt2x00/rt2400pci.c +++ b/drivers/net/wireless/rt2x00/rt2400pci.c @@ -1380,7 +1380,7 @@ static irqreturn_t rt2400pci_interrupt(int irq, void *dev_instance) rt2x00pci_register_write(rt2x00dev, CSR7, reg); if (!reg) - return IRQ_NONE; + return IRQ_HANDLED; if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) return IRQ_HANDLED; diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c index dcc0e1fcca77..d0b627c6c217 100644 --- a/drivers/net/wireless/rt2x00/rt2500pci.c +++ b/drivers/net/wireless/rt2x00/rt2500pci.c @@ -1512,7 +1512,7 @@ static irqreturn_t rt2500pci_interrupt(int irq, void *dev_instance) rt2x00pci_register_write(rt2x00dev, CSR7, reg); if (!reg) - return IRQ_NONE; + return IRQ_HANDLED; if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) return IRQ_HANDLED; diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c index bf55b4a311e3..9d83e70f3e62 100644 --- a/drivers/net/wireless/rt2x00/rt61pci.c +++ b/drivers/net/wireless/rt2x00/rt61pci.c @@ -2337,7 +2337,7 @@ static irqreturn_t rt61pci_interrupt(int irq, void *dev_instance) rt2x00pci_register_write(rt2x00dev, INT_SOURCE_CSR, reg); if (!reg && !reg_mcu) - return IRQ_NONE; + return IRQ_HANDLED; if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) return IRQ_HANDLED;