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| author |   Andrea Merello <andrea.merello@gmail.com> | 2015-12-26 13:47:23 -0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2015-12-29 11:40:45 +0100 |
| commit | a51744ddcc62925ec4d3d3d3a8a13bdd2033af59 (patch) | |
| tree | ac9f70131c4961fd17f8abd2f06607c57d0b388e /drivers/irqchip/irq-bcm2836.c | |
| parent | irqchip/bcm2836: Add SMP support for the 2836 (diff) | |
| download | linux-dev-a51744ddcc62925ec4d3d3d3a8a13bdd2033af59.tar.xz linux-dev-a51744ddcc62925ec4d3d3d3a8a13bdd2033af59.zip | |
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.merello@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Lee Jones <lee@kernel.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-rpi-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1451166444-11044-4-git-send-email-eric@anholt.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/irqchip/irq-bcm2836.c')
| -rw-r--r-- | drivers/irqchip/irq-bcm2836.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c index 59ac40c39551..bb8f234b6b73 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); |