From: Jesse Brandeburg <jesse.brandeburg@intel.com>
Date: Tue, 8 Jul 2008 22:51:42 +0000 (-0700)
Subject: ixgb: fix race on rx_buffer_len in mtu change
X-Git-Tag: v2.6.27-rc1~969^2~146^2~34
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5ca88eb335580dc48ef5ebb3b86719bdb5a4113;p=pandora-kernel.git

ixgb: fix race on rx_buffer_len in mtu change

some random coverage testing found that when changing mtu
under heavy traffic load, NAPI would use the rx_buffer_len variable
after it had been changed by change_mtu.

Similar to e1000 bugs found long ago.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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