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SUNRPC: skip dead but not buried clients on PipeFS events

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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>
This commit is contained in:
Stanislav Kinsbursky 2012-04-20 18:11:02 +04:00 committed by Trond Myklebust
parent 5794d21ef4
commit a4dff1bc49
1 changed files with 2 additions and 1 deletions
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3
net/sunrpc/clnt.c
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@ -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;
}