tree 9acb43b2ddaa8618cf90f65eef193bc813f39100
parent da3a9e9e7b8341cfc939818103cb7ef9f5293de2
author Matt Carlson <mcarlson@broadcom.com> 1335274621 +0000
committer David S. Miller <davem@davemloft.net> 1335379301 -0400

tg3: Avoid panic from reserved statblk field access

When RSS is enabled, interrupt vector 0 does not receive any rx traffic.
The rx producer index fields for vector 0's status block should be
considered reserved in this case.  This patch changes the code to
respect these reserved fields, which avoids a kernel panic when these
fields take on non-zero values.

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