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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 56AE4C00454 for ; Wed, 11 Dec 2019 15:23:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 241742077B for ; Wed, 11 Dec 2019 15:23:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576077818; bh=yrCqURBF1LS8Yk5NB9S0YYrG5mdalSXhXTNPvL/2Jew=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UlIb7oqe8Rziw5EY2BGyo2tAAPmk43dJjWGRIaWybZj58AEWpeSsLBw4P/yBDm0p9 WR0Say6DEQHciV57MoLYwcAosXD/LnL8pCHTBp62KjpW06vduoiov08kByD6XJVxAz IXUEnkH7RetCV1cUwmVPEX43Y166mnBKr0gC+E2k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732737AbfLKPXh (ORCPT ); Wed, 11 Dec 2019 10:23:37 -0500 Received: from mail.kernel.org ([198.145.29.99]:54606 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732729AbfLKPXd (ORCPT ); Wed, 11 Dec 2019 10:23:33 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C3E382073D; Wed, 11 Dec 2019 15:23:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576077813; bh=yrCqURBF1LS8Yk5NB9S0YYrG5mdalSXhXTNPvL/2Jew=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ud+4YPcf0yUUf70YR3lG3ugiFczwk1vCDdfS/itV45PGcCeOwZG8iYUnHwBMFLfht iJAKp4ziBPSeOuDrZq9W5vvZEBzEcjCw8VFJ+TrvYQar7Poilgw8YODschpcll7n43 WchR4r5l3vwG4EKaVdbpEluRi6kdaOyQwEFyV9AM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andreas Pape , Kieran Bingham , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.19 179/243] media: stkwebcam: Bugfix for wrong return values Date: Wed, 11 Dec 2019 16:05:41 +0100 Message-Id: <20191211150351.254659809@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191211150339.185439726@linuxfoundation.org> References: <20191211150339.185439726@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andreas Pape [ Upstream commit 3c28b91380dd1183347d32d87d820818031ebecf ] usb_control_msg returns in case of a successfully sent message the number of sent bytes as a positive number. Don't use this value as a return value for stk_camera_read_reg, as a non-zero return value is used as an error condition in some cases when stk_camera_read_reg is called. Signed-off-by: Andreas Pape Reviewed-by: Kieran Bingham Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/stkwebcam/stk-webcam.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c index 6e3f234e790b8..e33fa78ef98dd 100644 --- a/drivers/media/usb/stkwebcam/stk-webcam.c +++ b/drivers/media/usb/stkwebcam/stk-webcam.c @@ -164,7 +164,11 @@ int stk_camera_read_reg(struct stk_camera *dev, u16 index, u8 *value) *value = *buf; kfree(buf); - return ret; + + if (ret < 0) + return ret; + else + return 0; } static int stk_start_stream(struct stk_camera *dev) -- 2.20.1