Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936244AbdLRQOg (ORCPT ); Mon, 18 Dec 2017 11:14:36 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:43734 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934582AbdLRQOc (ORCPT ); Mon, 18 Dec 2017 11:14:32 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mauro Carvalho Chehab , Todor Tomov , Sasha Levin Subject: [PATCH 4.14 089/178] media: camss-vfe: always initialize reg at vfe_set_xbar_cfg() Date: Mon, 18 Dec 2017 16:48:45 +0100 Message-Id: <20171218152924.436613912@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20171218152920.567991776@linuxfoundation.org> References: <20171218152920.567991776@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1444 Lines: 38 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mauro Carvalho Chehab [ Upstream commit 9917fbcfa20ab987d6381fd0365665e5c1402d75 ] if output->wm_num is bigger than 2, the value for reg is not initialized, as warned by smatch: drivers/media/platform/qcom/camss-8x16/camss-vfe.c:633 vfe_set_xbar_cfg() error: uninitialized symbol 'reg'. drivers/media/platform/qcom/camss-8x16/camss-vfe.c:637 vfe_set_xbar_cfg() error: uninitialized symbol 'reg'. That shouldn't happen in practice, so add a logic that will break the loop if i > 1, fixing the warnings. Signed-off-by: Mauro Carvalho Chehab Acked-by: Todor Tomov Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/media/platform/qcom/camss-8x16/camss-vfe.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/media/platform/qcom/camss-8x16/camss-vfe.c +++ b/drivers/media/platform/qcom/camss-8x16/camss-vfe.c @@ -622,6 +622,9 @@ static void vfe_set_xbar_cfg(struct vfe_ reg = VFE_0_BUS_XBAR_CFG_x_M_PAIR_STREAM_EN; if (p == V4L2_PIX_FMT_NV12 || p == V4L2_PIX_FMT_NV16) reg |= VFE_0_BUS_XBAR_CFG_x_M_PAIR_STREAM_SWAP_INTER_INTRA; + } else { + /* On current devices output->wm_num is always <= 2 */ + break; } if (output->wm_idx[i] % 2 == 1)