From: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Date: Wed, 9 Feb 2011 20:12:00 +0000 (-0500)
Subject: xen-gntdev: Avoid unmapping ranges twice
X-Git-Tag: v2.6.39-rc1~439^3~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b57c18694ea1641b691fa05ed8af0ce339fa430b;p=pandora-kernel.git

xen-gntdev: Avoid unmapping ranges twice

In paravirtualized domains, mn_invl_page or mn_invl_range_start can
unmap a segment of a mapped region without unmapping all pages. When
the region is later released, the pages will be unmapped twice, leading
to an incorrect -EINVAL return.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

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