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LOCKD: Clear ln->nsm_clnt only when ln->nsm_users is zero 

The current code is clearing it in all cases _except_ when zero.

Reported-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Trond Myklebust 2012-10-24 08:53:35 -04:00
parent a4ee8d978e
commit e498daa812
1 changed files with 6 additions and 8 deletions
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14
fs/lockd/mon.c
View File

@ -124,18 +124,16 @@ out:
static void nsm_client_put(struct net *net) static void nsm_client_put(struct net *net)
{ {
struct lockd_net *ln = net_generic(net, lockd_net_id); struct lockd_net *ln = net_generic(net, lockd_net_id);
struct rpc_clnt *clnt = ln->nsm_clnt; struct rpc_clnt *clnt = NULL;
int shutdown = 0;
spin_lock(&ln->nsm_clnt_lock); spin_lock(&ln->nsm_clnt_lock);
if (ln->nsm_users) { ln->nsm_users--;
if (--ln->nsm_users) if (ln->nsm_users == 0) {
ln->nsm_clnt = NULL; clnt = ln->nsm_clnt;
shutdown = !ln->nsm_users; ln->nsm_clnt = NULL;
} }
spin_unlock(&ln->nsm_clnt_lock); spin_unlock(&ln->nsm_clnt_lock);
if (clnt != NULL)
if (shutdown)
rpc_shutdown_client(clnt); rpc_shutdown_client(clnt);
} }