From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Thu, 23 Jul 2009 18:10:06 +0000 (+0000)
Subject: igb: use buffer_info->dma instead of shinfo->nr_frags to determine unmap
X-Git-Tag: v2.6.32-rc1~703^2~549
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d94d8ab76ea6c858c6e2eb0ab0403b00b031039;p=pandora-kernel.git

igb: use buffer_info->dma instead of shinfo->nr_frags to determine unmap

This change makes it so that we use buffer_info->dma instead of
shinfo->nr_frags to determine if we need to unmap a received skb.  By doing
this we can avoid a cache miss on small packets since the buffer_info
structure should already be prefetched.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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