From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: [PATCH] Input: evdev - add a schedule point in evdev_write() Date: Thu, 4 Oct 2018 17:53:59 -0700 Message-ID: <20181005005359.GA218372@dtor-ws> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: linux-input@vger.kernel.org Cc: Eric Dumazet , "Paul E. McKenney" , linux-kernel@vger.kernel.org List-Id: linux-input@vger.kernel.org Large writes to evdev interface may cause rcu stalls. Let's add cond_resched() to the loop to avoid this. Signed-off-by: Dmitry Torokhov --- drivers/input/evdev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 370206f987f9..f48369d6f3a0 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -564,6 +564,7 @@ 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: -- 2.19.0.605.g01d371f741-goog -- Dmitry