Commit-ID: d9e4ad5badf4ccbfddee208c898fb8fd0c8836b1 Gitweb: http://git.kernel.org/tip/d9e4ad5badf4ccbfddee208c898fb8fd0c8836b1 Author: David Woodhouse <dwmw2@xxxxxxxxxxxxx> AuthorDate: Wed, 28 Oct 2015 16:14:31 +0900 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Fri, 30 Oct 2015 10:13:26 +0100 Document that IRQ_NONE should be returned when IRQ not actually handled Our IRQ storm detection works when an interrupt handler returns IRQ_NONE for thousands of consecutive interrupts in a second. It doesn't hurt to occasionally return IRQ_NONE when the interrupt is actually genuine. Drivers should only be returning IRQ_HANDLED if they have actually *done* something to stop an interrupt from happening — it doesn't just mean "this really *was* my device". Signed-off-by: David Woodhouse <David.Woodhouse@xxxxxxxxx> Cc: davem@xxxxxxxxxxxxx Link: http://lkml.kernel.org/r/1446016471.3405.201.camel@xxxxxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- include/linux/irqreturn.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/irqreturn.h b/include/linux/irqreturn.h index e374e36..eb1bdcf 100644 --- a/include/linux/irqreturn.h +++ b/include/linux/irqreturn.h @@ -3,7 +3,7 @@ /** * enum irqreturn - * @IRQ_NONE interrupt was not from this device + * @IRQ_NONE interrupt was not from this device or was not handled * @IRQ_HANDLED interrupt was handled by this device * @IRQ_WAKE_THREAD handler requests to wake the handler thread */ -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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