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irqchip/bcm2836: Tolerate IRQs while no flag is set in ISR

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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]>
This commit is contained in:
Andrea Merello 2015-12-26 13:47:23 -08:00 • committed by Thomas Gleixner
commit a51744ddcc
1 changed files with 1 additions and 1 deletions
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2
drivers/irqchip/irq-bcm2836.c
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@ -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);