SUNRPC: Use more consistent variable typing in xs_send_pagedata

index cc33c58..dd2a9db 100644
@@ -319,7 +319,8 @@ static int xs_send_kvec(struct socket *sock, struct sockaddr *addr, int addrlen,
 	return kernel_sendmsg(sock, &msg, NULL, 0, 0);
 }
 
-static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned int base, int more)
+static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr,
+			    unsigned int base, int more)
 {
 	struct page **ppage;
 	unsigned int remainder;

@@ -330,14 +331,17 @@ static int xs_send_pagedata(struct socket *sock, struct xdr_buf *xdr, unsigned i
 	ppage = xdr->pages + (base >> PAGE_SHIFT);
 	base &= ~PAGE_MASK;
 	for(;;) {
-		unsigned int len = min_t(unsigned int, PAGE_SIZE - base, remainder);
+		size_t len = min_t(size_t, PAGE_SIZE - base, remainder);
 		int flags = XS_SENDMSG_FLAGS;
 
 		remainder -= len;
 		if (remainder != 0 || more)
 			flags |= MSG_MORE;
-		err = sock->ops->sendpage(sock, *ppage, base, len, flags);
-		if (remainder == 0 || err != len)
+		err = sock->ops->sendpage(sock, *ppage, (int)base, len, flags);
+		if (err < 0 || (size_t)err != len)
+			break;
+
+		if (remainder == 0)
 			break;
 		sent += err;
 		ppage++;