From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C68B1C004D3 for ; Mon, 22 Oct 2018 10:22:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C9EE20652 for ; Mon, 22 Oct 2018 10:22:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="rNecHD1S" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8C9EE20652 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729350AbeJVSkj (ORCPT ); Mon, 22 Oct 2018 14:40:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:51230 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728248AbeJVSki (ORCPT ); Mon, 22 Oct 2018 14:40:38 -0400 Received: from sasha-vm.mshome.net (unknown [167.98.65.38]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2DE2C20652; Mon, 22 Oct 2018 10:22:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1540203762; bh=BA9yzita2oPSbZQXN5JfO+Bb0OEoIjdGg+IGbs2sl20=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rNecHD1SYu0qgk3LLOyH5V5UBbeDYRY+IJ5yQ2M/idOBslpINF2CHOPOQvL6mpDJX Pd8oAgBdhYhNpg9eUJyfwz315O8R6p2NvzbQo/tNaSQkEak54H66dwoMrPOhWqO1MN f9eKWO8VMpjA54JtdR4KaJUcboIx8ZAS7aq5rpAI= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Torokhov , Sasha Levin Subject: [PATCH AUTOSEL 4.4 4/5] Input: uinput - add a schedule point in uinput_inject_events() Date: Mon, 22 Oct 2018 06:22:31 -0400 Message-Id: <20181022102232.41527-4-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181022102232.41527-1-sashal@kernel.org> References: <20181022102232.41527-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 2bb4c8633d3b..459f3ce78235 100644 --- a/drivers/input/misc/uinput.c +++ b/drivers/input/misc/uinput.c @@ -454,6 +454,7 @@ 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