From: Jeff Layton <jlayton@redhat.com>
Date: Wed, 26 Mar 2014 14:24:23 +0000 (-0700)
Subject: cifs: fix actimeo=0 corner case when cifs_i->time == jiffies
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~192^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a87c9ad956676d84d459739fc14ec5a3c3565717;p=pandora-kernel.git

cifs: fix actimeo=0 corner case when cifs_i->time == jiffies

actimeo=0 is supposed to be a special case that ensures that inode
attributes are always refetched from the server instead of trusting the
cache. The cifs code however uses time_in_range() to determine whether
the attributes have timed out. In the case where cifs_i->time equals
jiffies, this leads to the cifs code not refetching the inode attributes
when it should.

Fix this by explicitly testing for actimeo=0, and handling it as a
special case.

Reported-and-tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
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