Commit-ID: a51744ddcc62925ec4d3d3d3a8a13bdd2033af59 Gitweb: http://git.kernel.org/tip/a51744ddcc62925ec4d3d3d3a8a13bdd2033af59 Author: Andrea Merello <[email protected]> AuthorDate: Sat, 26 Dec 2015 13:47:23 -0800 Committer: Thomas Gleixner <[email protected]> CommitDate: Tue, 29 Dec 2015 11:40:45 +0100
irqchip/bcm2836: Tolerate IRQs while no flag is set in ISR On my RPi2 I got a lot of: unexpected IRQ trap at vector 00 This happens because bcm2836_arm_irqchip_handle_irq() is sometimes invoked even if the ISR is clear, and this case is not handled. This patch explicitly handle this case, fixing the kernel complaints about the bad IRQ lookup. Signed-off-by: Andrea Merello <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Signed-off-by: Eric Anholt <[email protected]> Cc: [email protected] Cc: Stephen Warren <[email protected]> Cc: Lee Jones <[email protected]> Cc: Florian Fainelli <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Marc Zyngier <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- drivers/irqchip/irq-bcm2836.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c index 59ac40c..bb8f234 100644 --- a/drivers/irqchip/irq-bcm2836.c +++ b/drivers/irqchip/irq-bcm2836.c @@ -177,7 +177,7 @@ __exception_irq_entry bcm2836_arm_irqchip_handle_irq(struct pt_regs *regs) writel(1 << ipi, mailbox0); handle_IPI(ipi, regs); #endif - } else { + } else if (stat) { u32 hwirq = ffs(stat) - 1; handle_IRQ(irq_linear_revmap(intc.domain, hwirq), regs); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
