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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,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 4C107C433DF for ; Mon, 8 Jun 2020 23:43:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2827F2068D for ; Mon, 8 Jun 2020 23:43:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591659814; bh=Q1MnH9RZEWmo/MLTr/txxuhrn1OC1QQbfLP0JeFzoCs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=P0pK4OtM3F2HWqQUWU/xospsmVylHxgqX5XPo1eJKpdm14lc6nnNP6rkohZK5W6rl LRrBZS5KHKpV2E1NyrHtHECPTrxCfrm3Phi6TQ9Gyc+smvbnIee5TlgLJ6AMtpwUA3 t5JNx7zOo8hpQtz8JiYwZCWREgmBrydf46wzH508= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387879AbgFHXn3 (ORCPT ); Mon, 8 Jun 2020 19:43:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:55320 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387598AbgFHX1J (ORCPT ); Mon, 8 Jun 2020 19:27:09 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 9E85F20775; Mon, 8 Jun 2020 23:27:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658829; bh=Q1MnH9RZEWmo/MLTr/txxuhrn1OC1QQbfLP0JeFzoCs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dcSUYjMibokDUC++6FlPZRMe1EB5rhDEnibODQxWhMslR4y+nZLyExP92bC1YRFU/ AbwRgZvwgeGglUK22I0fVuprWLkGoVMOjPtba/yD5cTOVByy25rLPLB2ltRMxGx0A2 VE9efUzUsFWPkxw2bARePJ9kEPHG3qFa1fGKT0Nw= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Colin Ian King , Sean Young , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 20/50] media: dvb: return -EREMOTEIO on i2c transfer failure. Date: Mon, 8 Jun 2020 19:26:10 -0400 Message-Id: <20200608232640.3370262-20-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608232640.3370262-1-sashal@kernel.org> References: <20200608232640.3370262-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Colin Ian King [ Upstream commit 96f3a9392799dd0f6472648a7366622ffd0989f3 ] Currently when i2c transfers fail the error return -EREMOTEIO is assigned to err but then later overwritten when the tuner attach call is made. Fix this by returning early with the error return code -EREMOTEIO on i2c transfer failure errors. If the transfer fails, an uninitialized value will be read from b2. Addresses-Coverity: ("Unused value") Fixes: fbfee8684ff2 ("V4L/DVB (5651): Dibusb-mb: convert pll handling to properly use dvb-pll") Signed-off-by: Colin Ian King Signed-off-by: Sean Young Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/dvb-usb/dibusb-mb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/usb/dvb-usb/dibusb-mb.c b/drivers/media/usb/dvb-usb/dibusb-mb.c index a0057641cc86..c55180912c3a 100644 --- a/drivers/media/usb/dvb-usb/dibusb-mb.c +++ b/drivers/media/usb/dvb-usb/dibusb-mb.c @@ -84,7 +84,7 @@ static int dibusb_tuner_probe_and_attach(struct dvb_usb_adapter *adap) if (i2c_transfer(&adap->dev->i2c_adap, msg, 2) != 2) { err("tuner i2c write failed."); - ret = -EREMOTEIO; + return -EREMOTEIO; } if (adap->fe_adap[0].fe->ops.i2c_gate_ctrl) -- 2.25.1