[PATCH AUTOSEL 4.14 06/15] Input: evdev - add a schedule point in evdev_write()

[Sasha Levin]

From: Dmitry Torokhov <dmitry.torok...@gmail.com>

[ Upstream commit 36d2582ff235b4e01ad64a734c877a52dc762d9c ]

Large writes to evdev 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/evdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 925571475005..d6de0c0ed52f 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -558,6 +558,7 @@ static ssize_t evdev_write(struct file *file, const char 
__user *buffer,
 
                input_inject_event(&evdev->handle,
                                   event.type, event.code, event.value);
+               cond_resched();
        }
 
  out:
-- 
2.17.1