Commit-ID: a51744ddcc62925ec4d3d3d3a8a13bdd2033af59 Gitweb: http://git.kernel.org/tip/a51744ddcc62925ec4d3d3d3a8a13bdd2033af59 Author: Andrea Merello <andrea.mere...@gmail.com> AuthorDate: Sat, 26 Dec 2015 13:47:23 -0800 Committer: Thomas Gleixner <t...@linutronix.de> 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 <andrea.mere...@gmail.com> Reviewed-by: Eric Anholt <e...@anholt.net> Signed-off-by: Eric Anholt <e...@anholt.net> Cc: linux-arm-ker...@lists.infradead.org Cc: Stephen Warren <swar...@wwwdotorg.org> Cc: Lee Jones <l...@kernel.org> Cc: Florian Fainelli <f.faine...@gmail.com> Cc: Jason Cooper <ja...@lakedaemon.net> Cc: Marc Zyngier <marc.zyng...@arm.com> Cc: linux-rpi-ker...@lists.infradead.org Link: http://lkml.kernel.org/r/1451166444-11044-4-git-send-email-e...@anholt.net Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- 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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
