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    ARM: OMAP2+: INTC: Acknowledge stuck active interrupts · 698b4853
    Stefan Sørensen 提交于
    When an interrupt has become active on the INTC it will stay active
    until it is acked, even if masked or de-asserted. The
    INTC_PENDING_IRQn registers are however updated and since these are
    used by omap_intc_handle_irq to determine which interrupt to handle,
    it will never see the active interrupt. This will result in a storm of
    useless interrupts that is only stopped when another higher priority
    interrupt is asserted.
    
    Fix by sending the INTC an acknowledge if we find no interrupts to
    handle.
    
    Cc: stable@vger.kernel.org
    Signed-off-by: NStefan Sørensen <stefan.sorensen@spectralink.com>
    Signed-off-by: NTony Lindgren <tony@atomide.com>
    698b4853
irq.c 9.5 KB