[TG3]: Eliminate spurious interrupts.

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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.

Flush the interrupt mailbox in non-MSI handlers to de-assert the
IRQ immediately.  This seems to be the most straight forward approach
after discussion with Jeff Garzik and David Miller.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Michael Chan 2007-05-07 00:26:15 -07:00 • committed by David S. Miller

parent 8ed5d97e5e

commit c04cb34725

1 changed files with 10 additions and 2 deletions

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drivers/net/tg3.c

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