From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Torokhov , Sasha Levin Subject: [PATCH AUTOSEL 4.14 06/15] Input: evdev - add a schedule point in evdev_write() Date: Mon, 22 Oct 2018 06:20:17 -0400 Message-Id: <20181022102026.40869-6-sashal@kernel.org> In-Reply-To: <20181022102026.40869-1-sashal@kernel.org> References: <20181022102026.40869-1-sashal@kernel.org> List-ID: From: Dmitry Torokhov [ 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 Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin --- 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