Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.4 3/5] Input: evdev - add a schedule point in evdev_write() | Date | Mon, 22 Oct 2018 06:22:30 -0400 |
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From: Dmitry Torokhov <dmitry.torokhov@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 <paulmck@linux.ibm.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Sasha Levin <sashal@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 e9ae3d500a55..0bf5ad9cc492 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
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