]> git.baikalelectronics.ru Git - kernel.git/commit
MIPS: IRQ: Fix disable_irq on CPU IRQs
authorFelix Fietkau <nbd@openwrt.org>
Thu, 15 Jan 2015 18:05:28 +0000 (19:05 +0100)
committerRalf Baechle <ralf@linux-mips.org>
Fri, 16 Jan 2015 13:03:17 +0000 (14:03 +0100)
commit91dd0c8560cfa6dc7e74c0dda7ddd858e0f7bbdc
tree591487ead2b5a21ac85fa250bb42abc34cf0494a
parentf706c624ee8c78071380b43a092c52417c1d9f00
MIPS: IRQ: Fix disable_irq on CPU IRQs

If the irq_chip does not define .irq_disable, any call to disable_irq
will defer disabling the IRQ until it fires while marked as disabled.
This assumes that the handler function checks for this condition, which
handle_percpu_irq does not. In this case, calling disable_irq leads to
an IRQ storm, if the interrupt fires while disabled.

This optimization is only useful when disabling the IRQ is slow, which
is not true for the MIPS CPU IRQ.

Disable this optimization by implementing .irq_disable and .irq_enable

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8949/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/kernel/irq_cpu.c