[PATCH] NFSD: Decrease nfsd_users in nfsd_startup_generic fail

[Kinglong Mee <kinglongmee@gmail.com>]

If nfsd_startup_generic fail, nfsd_users isn't decreased right now.

NFSD restarts will return 0 at the first nfsd_users checking,
after that, nfs4_state_start_net() will meet a bad laundry_wq
(I meet NULL), after nfsd4_grace timeout, the kernel will crash.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
---
 fs/nfsd/nfssvc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 5d026dc..752d56b 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -221,7 +221,8 @@ static int nfsd_startup_generic(int nrservs)
 	 */
 	ret = nfsd_racache_init(2*nrservs);
 	if (ret)
-		return ret;
+		goto dec_users;
+
 	ret = nfs4_state_start();
 	if (ret)
 		goto out_racache;
@@ -229,6 +230,8 @@ static int nfsd_startup_generic(int nrservs)
 
 out_racache:
 	nfsd_racache_shutdown();
+dec_users:
+	nfsd_users--;
 	return ret;
 }
 
-- 
1.9.3