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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 C0B6AC43387 for ; Tue, 1 Jan 2019 09:02:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 93CFD208E3 for ; Tue, 1 Jan 2019 09:02:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728627AbfAAJCL (ORCPT ); Tue, 1 Jan 2019 04:02:11 -0500 Received: from mx2.suse.de ([195.135.220.15]:37598 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726480AbfAAJCK (ORCPT ); Tue, 1 Jan 2019 04:02:10 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 65F16AE10; Tue, 1 Jan 2019 09:02:09 +0000 (UTC) Date: Tue, 01 Jan 2019 10:02:09 +0100 Message-ID: From: Takashi Iwai To: "Kangjie Lu" Cc: , "Jaroslav Kysela" , , Subject: Re: [PATCH] pci: fix a missing check of snd_i2c_sendbytes In-Reply-To: <20181226051206.74467-1-kjlu@umn.edu> References: <20181226051206.74467-1-kjlu@umn.edu> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/26 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 26 Dec 2018 06:12:04 +0100, Kangjie Lu wrote: > > snd_i2c_sendbytes could fail. The fix checks its return value: if it > fails, issues an error message and returns with its error code. > > Signed-off-by: Kangjie Lu > --- > sound/pci/ice1712/ews.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/sound/pci/ice1712/ews.c b/sound/pci/ice1712/ews.c > index b8af747ecb43..b978cdb0fc20 100644 > --- a/sound/pci/ice1712/ews.c > +++ b/sound/pci/ice1712/ews.c > @@ -826,7 +826,10 @@ static int snd_ice1712_6fire_read_pca(struct snd_ice1712 *ice, unsigned char reg > > snd_i2c_lock(ice->i2c); > byte = reg; > - snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_6FIRE], &byte, 1); > + if (snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_6FIRE], &byte, 1)) { > + dev_err(ice->card->dev, "cannot send pca\n"); > + return -EIO; You forgot to unlock before returning. thanks, Takashi