NFSD: Replace READ* macros in nfsd4_decode_release_lockowner()

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

fs/nfsd/nfs4xdr.c

@@ -1418,20 +1418,20 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
 static __be32
 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
 {
-	DECODE_HEAD;
+	__be32 status;
 
 	if (argp->minorversion >= 1)
 		return nfserr_notsupp;
 
-	READ_BUF(12);
-	COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
-	rlockowner->rl_owner.len = be32_to_cpup(p++);
-	READ_BUF(rlockowner->rl_owner.len);
-	READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
+	status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
+					   &rlockowner->rl_owner);
+	if (status)
+		return status;
 
 	if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
 		return nfserr_inval;
-	DECODE_TAIL;
+
+	return nfs_ok;
 }
 
 static __be32