NFSD: Replace READ* macros in nfsd4_decode_putfh()

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

fs/nfsd/nfs4xdr.c

@@ -1190,16 +1190,21 @@ nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_d
 static __be32
 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
 {
-	DECODE_HEAD;
+	__be32 *p;
 
-	READ_BUF(4);
-	putfh->pf_fhlen = be32_to_cpup(p++);
+	if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
+		return nfserr_bad_xdr;
 	if (putfh->pf_fhlen > NFS4_FHSIZE)
-		goto xdr_error;
-	READ_BUF(putfh->pf_fhlen);
-	SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
+		return nfserr_bad_xdr;
+	p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
+	if (!p)
+		return nfserr_bad_xdr;
+	putfh->pf_fhval = svcxdr_tmpalloc(argp, putfh->pf_fhlen);
+	if (!putfh->pf_fhval)
+		return nfserr_jukebox;
+	memcpy(putfh->pf_fhval, p, putfh->pf_fhlen);
 
-	DECODE_TAIL;
+	return nfs_ok;
 }
 
 static __be32