From patchwork Wed Jun 16 12:28:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 461729 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=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, 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 B3585C49EA2 for ; Wed, 16 Jun 2021 12:28:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98AA76135C for ; Wed, 16 Jun 2021 12:28:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232915AbhFPMax (ORCPT ); Wed, 16 Jun 2021 08:30:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:49300 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232543AbhFPMaq (ORCPT ); Wed, 16 Jun 2021 08:30:46 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9825D613C1; Wed, 16 Jun 2021 12:28:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1623846520; bh=6esczEUC+IAp1wiH2+5uojr1T2m2zz+t/CuNq/KViCQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K4zuMsVGPMOi3SVQn90yWK7XUuLc/v436/GjGpW7KhK3WcvVWEnZmDMFSbBmvxCS3 vxgHiHl/GdHe1JRORqirVkCgFAy4EvHkl2o/UZtwznki4ChPk92vAkzc3TsoyGf4Xp mHnCrH16I58Fn2bw0+MppGVKqI4Zybs1oI5vGa6mwhn6We0KYW1SmgSXBehLOuTXwy KvmuPtVL8+swAgQ7dWnKzuGb1ymso+zhybCXODvn0QLs/uVP5vD6MyoVAVa/poACl0 FnRx0vNVCbdEhIedt2lBU6nKm31yt2h34usvCVmkZzNV7366Ri/R/Ap21CeNVXsQyr py0l8vtepZnzQ== Received: by mail.kernel.org with local (Exim 4.94.2) (envelope-from ) id 1ltUes-004oj3-Hz; Wed, 16 Jun 2021 14:28:38 +0200 From: Mauro Carvalho Chehab Cc: linuxarm@huawei.com, mauro.chehab@huawei.com, Mauro Carvalho Chehab , Hyun Kwon , Laurent Pinchart , Mauro Carvalho Chehab , Michal Simek , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH 11/11] media: xilinx: simplify get fourcc logic Date: Wed, 16 Jun 2021 14:28:37 +0200 Message-Id: X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Sender: Mauro Carvalho Chehab To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Right now, there are two calls for xvip_get_format_by_fourcc(). If the first one fails, it is called again in order to pick the first available format: V4L2_PIX_FMT_YUYV. This ends by producing a smatch warnings: drivers/media/platform/xilinx/xilinx-dma.c:555 __xvip_dma_try_format() error: 'info' dereferencing possible ERR_PTR() drivers/media/platform/xilinx/xilinx-dma.c: drivers/media/platform/xilinx/xilinx-dma.c:664 xvip_dma_init() error: 'dma->fmtinfo' dereferencing possible ERR_PTR() as it is hard for an static analyzer to ensure that calling xvip_get_format_by_fourcc(XVIP_DMA_DEF_FORMAT) won't return an error. So, better to optimize the logic, ensuring that the function will never return an error. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/xilinx/xilinx-dma.c | 5 +---- drivers/media/platform/xilinx/xilinx-vip.c | 6 +++--- 2 files changed, 4 insertions(+), 7 deletions(-) diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c index 2a56201cb853..338c3661d809 100644 --- a/drivers/media/platform/xilinx/xilinx-dma.c +++ b/drivers/media/platform/xilinx/xilinx-dma.c @@ -26,7 +26,6 @@ #include "xilinx-vip.h" #include "xilinx-vipp.h" -#define XVIP_DMA_DEF_FORMAT V4L2_PIX_FMT_YUYV #define XVIP_DMA_DEF_WIDTH 1920 #define XVIP_DMA_DEF_HEIGHT 1080 @@ -549,8 +548,6 @@ __xvip_dma_try_format(struct xvip_dma *dma, struct v4l2_pix_format *pix, * requested format isn't supported. */ info = xvip_get_format_by_fourcc(pix->pixelformat); - if (IS_ERR(info)) - info = xvip_get_format_by_fourcc(XVIP_DMA_DEF_FORMAT); pix->pixelformat = info->fourcc; pix->field = V4L2_FIELD_NONE; @@ -660,7 +657,7 @@ int xvip_dma_init(struct xvip_composite_device *xdev, struct xvip_dma *dma, INIT_LIST_HEAD(&dma->queued_bufs); spin_lock_init(&dma->queued_lock); - dma->fmtinfo = xvip_get_format_by_fourcc(XVIP_DMA_DEF_FORMAT); + dma->fmtinfo = xvip_get_format_by_fourcc(V4L2_PIX_FMT_YUYV); dma->format.pixelformat = dma->fmtinfo->fourcc; dma->format.colorspace = V4L2_COLORSPACE_SRGB; dma->format.field = V4L2_FIELD_NONE; diff --git a/drivers/media/platform/xilinx/xilinx-vip.c b/drivers/media/platform/xilinx/xilinx-vip.c index 6ad61b08a31a..a4eb57683411 100644 --- a/drivers/media/platform/xilinx/xilinx-vip.c +++ b/drivers/media/platform/xilinx/xilinx-vip.c @@ -70,8 +70,8 @@ EXPORT_SYMBOL_GPL(xvip_get_format_by_code); * @fourcc: the format 4CC * * Return: a pointer to the format information structure corresponding to the - * given V4L2 format @fourcc, or ERR_PTR if no corresponding format can be - * found. + * given V4L2 format @fourcc. If not found, return a pointer to the first + * available format (V4L2_PIX_FMT_YUYV). */ const struct xvip_video_format *xvip_get_format_by_fourcc(u32 fourcc) { @@ -84,7 +84,7 @@ const struct xvip_video_format *xvip_get_format_by_fourcc(u32 fourcc) return format; } - return ERR_PTR(-EINVAL); + return &xvip_video_formats[0]; } EXPORT_SYMBOL_GPL(xvip_get_format_by_fourcc);