NFS: restore module put when manager exits.

Commit f0f8648589e6 ("NFSD: Remove svc_serv_ops::svo_module") removed
calls to module_put_and_kthread_exit() from threads that acted as SUNRPC
servers and had a related svc_serv_ops structure.  This was correct.

It ALSO removed the module_put_and_kthread_exit() call from
nfs4_run_state_manager() which is NOT a SUNRPC service.

Consequently every time the NFSv4 state manager runs the module count
increments and won't be decremented.  So the nfsv4 module cannot be
unloaded.

So restore the module_put_and_kthread_exit() call.

Fixes: f0f8648589e6 ("NFSD: Remove svc_serv_ops::svo_module")
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 2540b35ec1870793d067dd915f4d37c834c0b7a9..9bab3e9c702a47153703c7f7ae62176fed75fe6f 100644 (file)
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -2753,5 +2753,6 @@ again:
                goto again;
 
        nfs_put_client(clp);
+       module_put_and_kthread_exit(0);
        return 0;
 }