diff options
| author | Michael Chan <mchan@broadcom.com> | 2007-07-07 22:51:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-10 22:18:35 -0700 |
| commit | b8a7ce7bedb2134acb731e08e588ad92087a40ff (patch) | |
| tree | 2d18138f5c9697f71861c37f94aa2e7cbfc5228b /Documentation/firmware_class | |
| parent | 9b1084b8f99a6b5e97c0c9bc1b4455db4fa51a07 (diff) | |
[BNX2]: Reduce spurious INTA interrupts.
Spurious interrupts are often encountered especially on systems
using the 8259 PIC mode. This is because the I/O write to deassert
the interrupt is posted and won't get to the chip immediately. As
a result, the IRQ may remain asserted after the IRQ handler exits,
causing spurious interrupts.
Add read back to flush the I/O write to deassert the IRQ immediately.
We also store the last_status_idx immediately in the IRQ handler to
help detect whether the interrupt is ours or not when the IRQ is
entered again before ->poll gets called.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/firmware_class')
0 files changed, 0 insertions, 0 deletions