From patchwork Mon Jul 12 06:04:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 475857 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 2672BC11F7D for ; Mon, 12 Jul 2021 07:03:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0EB2961363 for ; Mon, 12 Jul 2021 07:03:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242134AbhGLHGR (ORCPT ); Mon, 12 Jul 2021 03:06:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:40152 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243135AbhGLHEf (ORCPT ); Mon, 12 Jul 2021 03:04:35 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3B1CC61179; Mon, 12 Jul 2021 07:01:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626073307; bh=rrd+/5m+XlZ0KDdlO/QC2mj8cTFCxMABq/dve2gKSus=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jtwKZRJJvG4WntJzlwTwz3ohToOhuUyzVlN+5TgatGXrtXcPIqAFo3LJfLeEhIrpy Ypwl/PnYJo4Tey2Fu2IGyvEb+tjPOdPI+4tvgghnzKyug0e0PvADGuT01grTtsLN1u V6+oRAjBNjOLdeBa0mH4QzZyYSA4yBFxnJwc7HnE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Torokhov , Jiri Kosina , Sasha Levin Subject: [PATCH 5.12 196/700] HID: do not use down_interruptible() when unbinding devices Date: Mon, 12 Jul 2021 08:04:39 +0200 Message-Id: <20210712060954.576261950@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060924.797321836@linuxfoundation.org> References: <20210712060924.797321836@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dmitry Torokhov [ Upstream commit f2145f8dc566c4f3b5a8deb58dcd12bed4e20194 ] Action of unbinding driver from a device is not cancellable and should not fail, and driver core does not pay attention to the result of "remove" method, therefore using down_interruptible() in hid_device_remove() does not make sense. Signed-off-by: Dmitry Torokhov Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin --- drivers/hid/hid-core.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 0f69f35f2957..5550c943f985 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -2306,12 +2306,8 @@ static int hid_device_remove(struct device *dev) { struct hid_device *hdev = to_hid_device(dev); struct hid_driver *hdrv; - int ret = 0; - if (down_interruptible(&hdev->driver_input_lock)) { - ret = -EINTR; - goto end; - } + down(&hdev->driver_input_lock); hdev->io_started = false; hdrv = hdev->driver; @@ -2326,8 +2322,8 @@ static int hid_device_remove(struct device *dev) if (!hdev->io_started) up(&hdev->driver_input_lock); -end: - return ret; + + return 0; } static ssize_t modalias_show(struct device *dev, struct device_attribute *a,