cifs_iovec_read(): resubmit shouldn't restart the loop

... by that point the request we'd just resent is in the
head of the list anyway.  Just return to the beginning of
the loop body...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

fs/cifs/file.c

@@ -2918,8 +2918,8 @@ cifs_iovec_read(struct file *file, const struct iovec *iov,
 		rc = 0;
 
 	/* the loop below should proceed in the order of increasing offsets */
-restart_loop:
 	list_for_each_entry_safe(rdata, tmp, &rdata_list, list) {
+	again:
 		if (!rc) {
 			ssize_t copied;
 
@@ -2927,20 +2927,20 @@ cifs_iovec_read(struct file *file, const struct iovec *iov,
 			rc = wait_for_completion_killable(&rdata->done);
 			if (rc)
 				rc = -EINTR;
-			else if (rdata->result)
+			else if (rdata->result) {
 				rc = rdata->result;
-			else {
+				/* resend call if it's a retryable error */
+				if (rc == -EAGAIN) {
+					rc = cifs_retry_async_readv(rdata);
+					goto again;
+				}
+			} else {
 				rc = cifs_readdata_to_iov(rdata, iov,
 							nr_segs, *poffset,
 							&copied);
 				total_read += copied;
 			}
 
-			/* resend call if it's a retryable error */
-			if (rc == -EAGAIN) {
-				rc = cifs_retry_async_readv(rdata);
-				goto restart_loop;
-			}
 		}
 		list_del_init(&rdata->list);
 		kref_put(&rdata->refcount, cifs_uncached_readdata_release);