lkml.org 
[lkml]   [2018]   [Oct]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH AUTOSEL 3.18 3/4] Input: uinput - add a schedule point in uinput_inject_events()
Date
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

[ Upstream commit cecf10704899467a787975e3d94a1f0129b9688e ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/input/misc/uinput.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 5221450f9b57..0cc05a4cf685 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -456,6 +456,7 @@ 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;
--
2.17.1
\
 
 \ /
  Last update: 2018-10-22 12:24    [W:0.057 / U:0.712 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site