msm: camera: Do not ignore ERESTARTSYS return from wait function

By ignoring ERESTARTSYS return from wait function, the thread
could potentially hold up the freezing of the task for a long
time, causing battery drain.

Bug: 10577806
Signed-off-by: Shuzhen Wang <shuzhenw@codeaurora.org>
Change-Id: I653c06c6bf41b07c811d6bab33e3c839460f45b6

drivers/media/platform/msm/camera_v2/msm.c

@@ -691,14 +691,9 @@ int msm_post_event(struct v4l2_event *event, int timeout)
 		return rc;
 	}
 
-	/* should wait on session based condition */
-	do {
 	rc = wait_event_interruptible_timeout(cmd_ack->wait,
 		!list_empty_careful(&cmd_ack->command_q.list),
 		msecs_to_jiffies(timeout));
-		if (rc != -ERESTARTSYS)
-			break;
-	} while (1);
 
 	if (list_empty_careful(&cmd_ack->command_q.list)) {
 		if (!rc) {