Return-Path: From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Torokhov , Sasha Levin Subject: [PATCH AUTOSEL 3.18 3/4] Input: uinput - add a schedule point in uinput_inject_events() Date: Mon, 22 Oct 2018 06:22:54 -0400 Message-Id: <20181022102255.41695-3-sashal@kernel.org> In-Reply-To: <20181022102255.41695-1-sashal@kernel.org> References: <20181022102255.41695-1-sashal@kernel.org> List-ID: From: Dmitry Torokhov [ 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 Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin --- 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