NFSD: remove redundant variable status

Return value directly from fh_verify() do_open_permission()
exp_pseudoroot() instead of getting value from
redundant variable status.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Jinpeng Cui <cui.jinpeng2@zte.com.cn>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

fs/nfsd/nfs4proc.c

@@ -141,7 +141,6 @@ fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 static __be32
 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 {
- __be32 status;
 
  if (open->op_truncate &&
  !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
@@ -156,9 +155,7 @@ do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs
  if (open->op_share_deny & NFS4_SHARE_DENY_READ)
  accmode |= NFSD_MAY_WRITE;
 
- status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
-
- return status;
+ return fh_verify(rqstp, current_fh, S_IFREG, accmode);
 }
 
 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
@@ -454,7 +451,6 @@ static __be32
 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
 {
  struct svc_fh *current_fh = &cstate->current_fh;
- __be32 status;
  int accmode = 0;
 
  /* We don't know the target directory, and therefore can not
@@ -479,9 +475,7 @@ do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, str
  if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
  accmode = NFSD_MAY_OWNER_OVERRIDE;
 
- status = do_open_permission(rqstp, current_fh, open, accmode);
-
- return status;
+ return do_open_permission(rqstp, current_fh, open, accmode);
 }
 
 static void
@@ -668,11 +662,9 @@ static __be32
 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  union nfsd4_op_u *u)
 {
- __be32 status;
-
  fh_put(&cstate->current_fh);
- status = exp_pseudoroot(rqstp, &cstate->current_fh);
- return status;
+
+ return exp_pseudoroot(rqstp, &cstate->current_fh);
 }
 
 static __be32