From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 1 Mar 2013 00:19:59 +0000 (-0800)
Subject: NFSv4: Fix another open/open_recovery deadlock
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7aa262b522ee5a7f1bf9b8fe34539b262ba6da0a;p=linux-beck.git

NFSv4: Fix another open/open_recovery deadlock

If we don't release the open seqid before we wait for state recovery,
then we may end up deadlocking the state recovery thread.
This patch addresses a new deadlock that was introduced by
commit c21443c2c792cd9b463646d982b0fe48aa6feb0f (NFSv4: Fix a reboot
recovery race when opening a file)

Reported-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 655237fc46df..37eb38566fbc 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1158,6 +1158,7 @@ _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
 			data->o_arg.fmode);
 	iput(inode);
 out:
+	nfs_release_seqid(data->o_arg.seqid);
 	return state;
 err_put_inode:
 	iput(inode);