nfsd: don't run get_file if nfs4_preprocess_stateid_op return error

we should return error status directly when nfs4_preprocess_stateid_op
return error.

Signed-off-by: fanchaoting <fanchaoting@cn.fujitsu.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 42c498ce9f0e12d8faec855a4e927dcc8b04d6a5..a9b707b23858cc195a17e22f9f2a00febad45ae1 100644 (file)
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -953,14 +953,14 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
        nfs4_lock_state();
        status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
                                        cstate, stateid, WR_STATE, &filp);
-       if (filp)
-               get_file(filp);
-       nfs4_unlock_state();
-
        if (status) {
+               nfs4_unlock_state();
                dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
                return status;
        }
+       if (filp)
+               get_file(filp);
+       nfs4_unlock_state();
 
        cnt = write->wr_buflen;
        write->wr_how_written = write->wr_stable_how;