From: Chen Gong <gong.chen@linux.intel.com>
Date: Mon, 16 May 2011 17:58:57 +0000 (-0700)
Subject: pstore: fix one type of return value in pstore
X-Git-Tag: v3.0-rc1~378^2~2^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d38d74b648513dd8ed8bd2b67d899208ef4e09e;p=pandora-kernel.git

pstore: fix one type of return value in pstore

the return type of function _read_ in pstore is size_t,
but in the callback function of _read_, the logic doesn't
consider it too much, which means if negative value (assuming
error here) is returned, it will be converted to positive because
of type casting. ssize_t is enough for this function.

Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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