From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 5 Apr 2013 20:11:11 +0000 (-0400)
Subject: NFSv4/4.1: Fix bugs in nfs4[01]_walk_client_list
X-Git-Tag: v3.9-rc7~29^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b1f1fd1842e6ede25183c267ae733a7f67f00bc;p=pandora-kernel.git

NFSv4/4.1: Fix bugs in nfs4[01]_walk_client_list

It is unsafe to use list_for_each_entry_safe() here, because
when we drop the nn->nfs_client_lock, we pin the _current_ list
entry and ensure that it stays in the list, but we don't do the
same for the _next_ list entry. Use of list_for_each_entry() is
therefore the correct thing to do.

Also fix the refcounting in nfs41_walk_client_list().

Finally, ensure that the nfs_client has finished being initialised
and, in the case of NFSv4.1, that the session is set up.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Bryan Schumaker <bjschuma@netapp.com>
Cc: stable@vger.kernel.org [>= 3.7]
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