From: Matthew Wilcox <matthew.r.wilcox@intel.com>
Date: Tue, 13 Sep 2011 21:01:39 +0000 (-0400)
Subject: NVMe: Correct sg list setup in nvme_map_user_pages
X-Git-Tag: v3.3-rc1~16^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0ba1e497bca83a3d353eb47c9658afc54d83228;p=pandora-kernel.git

NVMe: Correct sg list setup in nvme_map_user_pages

Our SG list was constructed to always fill the entire first page, even
if that was more than the length of the I/O.  This is probably harmless,
but some IOMMUs might do something bad.

Correcting the first call to sg_set_page() made it look a lot closer to
the sg_set_page() in the loop, so fold the first call to sg_set_page()
into the loop.

Reported-by: Nisheeth Bhat <nisheeth.bhat@intel.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
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