https://github.com/torvalds/linux
Revision 251b928cdff5f12e7da8f56e8933e2b58ba08456 authored by Kenneth Tan on 18 October 2005, 06:53:35 UTC, committed by Russell King on 18 October 2005, 06:53:35 UTC
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: Kenneth Tan <chong.yin.tan@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
1 parent ad1b472
History
Tip revision: 251b928cdff5f12e7da8f56e8933e2b58ba08456 authored by Kenneth Tan on 18 October 2005, 06:53:35 UTC
[ARM] 3021/1: Interrupt 0 bug fix for ixp4xx
Tip revision: 251b928

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