diff options
| author | Kenneth Tan <chong.yin.tan@intel.com> | 2005-10-18 07:53:35 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2005-10-18 07:53:35 +0100 |
| commit | 251b928cdff5f12e7da8f56e8933e2b58ba08456 (patch) | |
| tree | dc978d9a44e865063b1cfb4606c03bae1b6e4eab /Documentation/DMA-mapping.txt | |
| parent | ad1b472bea1bbcd8dc7fd92f6952d8b2d8355edb (diff) | |
[ARM] 3021/1: Interrupt 0 bug fix for ixp4xx
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>
Diffstat (limited to 'Documentation/DMA-mapping.txt')
0 files changed, 0 insertions, 0 deletions