From: Brandeburg, Jesse <jesse.brandeburg@intel.com>
Date: Tue, 30 Sep 2008 13:08:48 +0000 (+0000)
Subject: ixgb: fix bug when freeing resources
X-Git-Tag: v2.6.27.15~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7fe09db5ae3d18b0915d6c0ef3d55a004e16e267;p=pandora-kernel.git

ixgb: fix bug when freeing resources

commit 23e55a32ca1ffdbe7a492ef99f0e0ac48e504a13 upstream.

It was pointed out by Breno Leitao <leitao@linux.vnet.ibm.com> that
ixgb would crash on PPC when an IOMMU was in use, if change_mtu was
called.

It appears to be a pretty simple issue in the driver that wasn't discovered
because most systems don't run with an IOMMU.  The driver needs to only unmap
buffers that are mapped (duh).

CC: Breno Leitao <leitao@linux.vnet.ibm.com>

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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