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authorThomas Gleixner <tglx@linutronix.de>2013-11-06 12:30:07 +0100
committerThomas Gleixner <tglx@linutronix.de>2013-11-13 16:03:02 +0100
commitb39898cd4077f4b6ec706e717c938751c34e1dc4 (patch)
treeff5abed20e1f0199124d83844e714a3eff2b895b /arch/tile
parent9b66bfb28049594fe2bb2b91607ba302f511ce8b (diff)
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genirq: Prevent spurious detection for unconditionally polled interrupts
On a 68k platform a couple of interrupts are demultiplexed and "polled" from a top level interrupt. Unfortunately there is no way to determine which of the sub interrupts raised the top level interrupt, so all of the demultiplexed interrupt handlers need to be invoked. Given a high enough frequency this can trigger the spurious interrupt detection mechanism, if one of the demultiplex interrupts returns IRQ_NONE continuously. But this is a false positive as the polling causes this behaviour and not buggy hardware/software. Introduce IRQ_POLLED which can be set at interrupt chip setup time via irq_set_status_flags(). The flag excludes the interrupt from the spurious detector and from all core polling activities. Reported-and-tested-by: Michael Schmitz <schmitzmic@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-m68k@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1311061149250.23353@ionos.tec.linutronix.de
Diffstat (limited to 'arch/tile')
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