From patchwork Fri Mar 23 11:56:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 10304325 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 874A960386 for ; Fri, 23 Mar 2018 11:57:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7886A28DFC for ; Fri, 23 Mar 2018 11:57:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6D11B28E02; Fri, 23 Mar 2018 11:57:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EF87E28DFC for ; Fri, 23 Mar 2018 11:57:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753999AbeCWL50 (ORCPT ); Fri, 23 Mar 2018 07:57:26 -0400 Received: from osg.samsung.com ([64.30.133.232]:53652 "EHLO osg.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753880AbeCWL5Y (ORCPT ); Fri, 23 Mar 2018 07:57:24 -0400 Received: from localhost (localhost [127.0.0.1]) by osg.samsung.com (Postfix) with ESMTP id C438D2A684; Fri, 23 Mar 2018 04:57:23 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at dev.s-opensource.com X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" Received: from osg.samsung.com ([127.0.0.1]) by localhost (localhost [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id joQU6ncsioZI; Fri, 23 Mar 2018 04:57:22 -0700 (PDT) Received: from smtp.s-opensource.com (unknown [179.183.96.62]) by osg.samsung.com (Postfix) with ESMTPSA id BD08F2A643; Fri, 23 Mar 2018 04:57:21 -0700 (PDT) Received: from mchehab by smtp.s-opensource.com with local (Exim 4.90_1) (envelope-from ) id 1ezLJv-0000MD-BC; Fri, 23 Mar 2018 07:57:19 -0400 From: Mauro Carvalho Chehab Cc: Mauro Carvalho Chehab , Linux Media Mailing List , Mauro Carvalho Chehab , Sean Young , Hans Verkuil , Kees Cook Subject: [PATCH 11/30] media: bttv-input: better handle errors at I2C transfer Date: Fri, 23 Mar 2018 07:56:57 -0400 Message-Id: X-Mailer: git-send-email 2.14.3 In-Reply-To: <39adb4e739050dcdb74c3465d261de8de5f224b7.1521806166.git.mchehab@s-opensource.com> References: <39adb4e739050dcdb74c3465d261de8de5f224b7.1521806166.git.mchehab@s-opensource.com> In-Reply-To: <39adb4e739050dcdb74c3465d261de8de5f224b7.1521806166.git.mchehab@s-opensource.com> References: <39adb4e739050dcdb74c3465d261de8de5f224b7.1521806166.git.mchehab@s-opensource.com> To: unlisted-recipients:; (no To-header on input) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The error handling logic at get_key_pv951() is a little bit akward, with produces this false positive warning: drivers/media/pci/bt8xx/bttv-input.c:344 get_key_pv951() error: uninitialized symbol 'b'. Do a cleanup. As a side effect, it also improves its coding style. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/pci/bt8xx/bttv-input.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/media/pci/bt8xx/bttv-input.c b/drivers/media/pci/bt8xx/bttv-input.c index da49c5567db5..08266b23826e 100644 --- a/drivers/media/pci/bt8xx/bttv-input.c +++ b/drivers/media/pci/bt8xx/bttv-input.c @@ -332,11 +332,15 @@ static void bttv_ir_stop(struct bttv *btv) static int get_key_pv951(struct IR_i2c *ir, enum rc_proto *protocol, u32 *scancode, u8 *toggle) { + int rc; unsigned char b; /* poll IR chip */ - if (1 != i2c_master_recv(ir->c, &b, 1)) { + rc = i2c_master_recv(ir->c, &b, 1); + if (rc != 1) { dprintk("read error\n"); + if (rc < 0) + return rc; return -EIO; }