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authorStanislav Kinsbursky <skinsbursky@parallels.com>2012-04-20 18:11:02 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-04-27 14:09:59 -0400
commita4dff1bc492ee4a2184d384ae8b5bcab5859e150 (patch)
treeb6bdb438cfa7c041d6e0a7b42f8c10c213961215 /net/sunrpc/clnt.c
parent5794d21ef4639f0e33440927bb903f9598c21e92 (diff)
SUNRPC: skip dead but not buried clients on PipeFS events
These clients can't be safely dereferenced if their counter in 0. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
-rw-r--r--net/sunrpc/clnt.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 67972462a54..d10ebc4310f 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -218,7 +218,8 @@ static struct rpc_clnt *rpc_get_client_for_event(struct net *net, int event)
if (((event == RPC_PIPEFS_MOUNT) && clnt->cl_dentry) ||
((event == RPC_PIPEFS_UMOUNT) && !clnt->cl_dentry))
continue;
- atomic_inc(&clnt->cl_count);
+ if (atomic_inc_not_zero(&clnt->cl_count) == 0)
+ continue;
spin_unlock(&sn->rpc_client_lock);
return clnt;
}