[PATCH AUTOSEL 4.9 4/9] Input: uinput - add a schedule point in uinput_inject_events()

[Sasha Levin]

From: Dmitry Torokhov <dmitry.torok...@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 <paul...@linux.ibm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torok...@gmail.com>
Signed-off-by: Sasha Levin <sas...@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 022be0e22eba..d015fd7151c1 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -540,6 +540,7 @@ 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