• Kenneth Tan's avatar
    [ARM] 3021/1: Interrupt 0 bug fix for ixp4xx · 251b928c
    Kenneth Tan authored
    Patch from Kenneth Tan
    The get_irqnr_and_base subroutine of ixp4xx does not take interrupt 0 condition into account properly. We should not perform "subs" here. The Z flag will be set when interrupt 0 occur, which resulting "movne r1, sp" in the caller routine (irq_handler) not being executed.
    When interrupt 0 occur:
    o if CONFIG_CPU_IXP46X is not set, "subs" will set the Z flag and return
    o if CONFIG_CPU_IXP46X is set, codes in upper interrupt handling will be trigerred. But since this is not supper interrupt, the "cmp" in the upper interrupt handling portion will set the Z flag and return
    Signed-off-by: default avatarKenneth Tan <chong.yin.tan@intel.com>
    Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
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