tree 10b43d1a2b35f4e9874c3bb2ac2abe25973270b4
parent e95ef5d3f6bc60433883e1ef65dac747acd0bf1a
author Michael Chan <mchan@broadcom.com> 1272367689 +0000
committer David S. Miller <davem@davemloft.net> 1272404295 -0700

bnx2: Fix lost MSI-X problem on 5709 NICs.

It has been reported that under certain heavy traffic conditions in MSI-X
mode, the driver can lose an MSI-X vector causing all packets in the
associated rx/tx ring pair to be dropped.  The problem is caused by
the chip dropping the write to unmask the MSI-X vector by the kernel
(when migrating the IRQ for example).

This can be prevented by increasing the GRC timeout value for these
register read and write operations.

Thanks to Dell for helping us debug this problem.

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