ceph: simplify two mount_timeout sites

No need to bifurcate wait now that we've got ceph_timeout_jiffies().
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Yan, Zheng <zyan@redhat.com>

fs/ceph/dir.c

@@ -1257,17 +1257,11 @@ static int ceph_dir_fsync(struct file *file, loff_t start, loff_t end,
 
 		dout("dir_fsync %p wait on tid %llu (until %llu)\n",
 		     inode, req->r_tid, last_tid);
-		if (req->r_timeout) {
-			unsigned long time_left = wait_for_completion_timeout(
-					&req->r_safe_completion,
+		ret = !wait_for_completion_timeout(&req->r_safe_completion,
 					ceph_timeout_jiffies(req->r_timeout));
-			if (time_left > 0)
-				ret = 0;
-			else
+		if (ret)
 			ret = -EIO;  /* timed out */
-		} else {
-			wait_for_completion(&req->r_safe_completion);
-		}
+
 		ceph_mdsc_put_request(req);
 
 		spin_lock(&ci->i_unsafe_lock);

fs/ceph/mds_client.c

@@ -2266,16 +2266,18 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
 	/* wait */
 	mutex_unlock(&mdsc->mutex);
 	dout("do_request waiting\n");
-	if (req->r_timeout) {
-		err = (long)wait_for_completion_killable_timeout(
-					&req->r_completion,
-					ceph_timeout_jiffies(req->r_timeout));
-		if (err == 0)
-			err = -EIO;
-	} else if (req->r_wait_for_completion) {
+	if (!req->r_timeout && req->r_wait_for_completion) {
 		err = req->r_wait_for_completion(mdsc, req);
 	} else {
-		err = wait_for_completion_killable(&req->r_completion);
+		long timeleft = wait_for_completion_killable_timeout(
+					&req->r_completion,
+					ceph_timeout_jiffies(req->r_timeout));
+		if (timeleft > 0)
+			err = 0;
+		else if (!timeleft)
+			err = -EIO;  /* timed out */
+		else
+			err = timeleft;  /* killed */
 	}
 	dout("do_request waited, got %d\n", err);
 	mutex_lock(&mdsc->mutex);