From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Fri, 5 Oct 2018 00:50:48 +0000 (-0700)
Subject: Input: uinput - add a schedule point in uinput_inject_events()
X-Git-Tag: v4.19~15^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cecf10704899467a787975e3d94a1f0129b9688e;p=platform%2Fkernel%2Flinux-rpi.git

Input: uinput - add a schedule point in uinput_inject_events()

Large writes to uinput interface may cause rcu stalls. Let's add
cond_resched() to the loop to avoid this.

Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index eb14ddf..8ec483e 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -598,6 +598,7 @@ static ssize_t uinput_inject_events(struct uinput_device *udev,
 
 		input_event(udev->dev, ev.type, ev.code, ev.value);
 		bytes += input_event_size();
+		cond_resched();
 	}
 
 	return bytes;