From: Sachin Prabhu <sprabhu@redhat.com>
Date: Wed, 11 Jul 2012 11:28:05 +0000 (+0100)
Subject: Initialise mid_q_entry before putting it on the pending queue
X-Git-Tag: v3.5~20^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ffc61ccbb96809df8d97ed609ac86b509eaf9056;p=pandora-kernel.git

Initialise mid_q_entry before putting it on the pending queue

A user reported a crash in cifs_demultiplex_thread() caused by an
incorrectly set mid_q_entry->callback() function. It appears that the
callback assignment made in cifs_call_async() was not flushed back to
memory suggesting that a memory barrier was required here. Changing the
code to make sure that the mid_q_entry structure was completely
initialised before it was added to the pending queue fixes the problem.

Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
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