From patchwork Tue Mar 23 14:24:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Colin King X-Patchwork-Id: 12158173 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=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 B8BF5C433C1 for ; Tue, 23 Mar 2021 14:26:03 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 189E3619B2 for ; Tue, 23 Mar 2021 14:26:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 189E3619B2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=canonical.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=8ZC26NJk9uj1nkfMLtFjHZHycOU2xxe1VG0FdPlqAEg=; b=D7j56tPOHHqf901DCdk2YsVfiS X02L0s2C37bswdbzn3gJ/D0DIKCaIKOdcmvx1E68B6cAugcQnWRooToNYgb67GcaXxGSHszyottVn UzQuEy1E3eKhUbpErtu2poqMY3Sx59d7bbg93WFzbbn+1N4u5etqi661/kvc0CE5X1UTX3mpBItiF 8RAm3aDy9tgF3x0cpck9miHYkKLQCXoRwym6Q8sefhq2X+ts07MD/ovyTesXgGeSHex4XO6sNiujB KnN/N+QXDc4Np+UgBt6TC/dKT+kBUYlk5V+HDjBselkmLyKX+SN4yTea5wfs23Wf5EZj/qNrWO0CH Rk+UpLig==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lOhxR-00F9mF-9W; Tue, 23 Mar 2021 14:24:33 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lOhxM-00F9le-Vz for linux-arm-kernel@lists.infradead.org; Tue, 23 Mar 2021 14:24:30 +0000 Received: from 1.general.cking.uk.vpn ([10.172.193.212] helo=localhost) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1lOhxF-0000jQ-Pj; Tue, 23 Mar 2021 14:24:21 +0000 From: Colin King To: Mirela Rabulea , NXP Linux Team , Mauro Carvalho Chehab , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Hans Verkuil , linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH][next] media: imx-jpeg: Pass the v4l2_jpeg_header header argument by reference Date: Tue, 23 Mar 2021 14:24:21 +0000 Message-Id: <20210323142421.348695-1-colin.king@canonical.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210323_142429_133772_6E82A1F9 X-CRM114-Status: GOOD ( 14.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Colin Ian King Currently the header argument is being passed by value, so a copy of 256 byte structure on the stack is potentially occurring. Fix this by passing by reference to avoid any large stack copies. Addresses-Coverity: ("Big parameter passed by value") Fixes: 2db16c6ed72c ("media: imx-jpeg: Add V4L2 driver for i.MX8 JPEG Encoder/Decoder") Signed-off-by: Colin Ian King Reviewed-by: Mirela Rabulea --- drivers/media/platform/imx-jpeg/mxc-jpeg.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/media/platform/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/imx-jpeg/mxc-jpeg.c index adb1715c75d7..f13a8efc35ad 100644 --- a/drivers/media/platform/imx-jpeg/mxc-jpeg.c +++ b/drivers/media/platform/imx-jpeg/mxc-jpeg.c @@ -1114,21 +1114,21 @@ static int mxc_jpeg_valid_comp_id(struct device *dev, } static u32 mxc_jpeg_get_image_format(struct device *dev, - const struct v4l2_jpeg_header header) + const struct v4l2_jpeg_header *header) { int i; u32 fourcc = 0; for (i = 0; i < MXC_JPEG_NUM_FORMATS; i++) - if (mxc_formats[i].subsampling == header.frame.subsampling && - mxc_formats[i].nc == header.frame.num_components) { + if (mxc_formats[i].subsampling == header->frame.subsampling && + mxc_formats[i].nc == header->frame.num_components) { fourcc = mxc_formats[i].fourcc; break; } if (fourcc == 0) { dev_err(dev, "Could not identify image format nc=%d, subsampling=%d\n", - header.frame.num_components, - header.frame.subsampling); + header->frame.num_components, + header->frame.subsampling); return fourcc; } /* @@ -1137,7 +1137,7 @@ static u32 mxc_jpeg_get_image_format(struct device *dev, * ITU-T T.872 chapter 6.5.3 APP14 marker segment for colour encoding */ if (fourcc == V4L2_PIX_FMT_YUV24 || fourcc == V4L2_PIX_FMT_RGB24) { - if (header.app14_tf == V4L2_JPEG_APP14_TF_CMYK_RGB) + if (header->app14_tf == V4L2_JPEG_APP14_TF_CMYK_RGB) fourcc = V4L2_PIX_FMT_RGB24; else fourcc = V4L2_PIX_FMT_YUV24; @@ -1258,7 +1258,7 @@ static int mxc_jpeg_parse(struct mxc_jpeg_ctx *ctx, if (!mxc_jpeg_valid_comp_id(dev, psof, psos)) dev_warn(dev, "JPEG component ids should be 0-3 or 1-4"); - fourcc = mxc_jpeg_get_image_format(dev, header); + fourcc = mxc_jpeg_get_image_format(dev, &header); if (fourcc == 0) return -EINVAL;