From patchwork Thu Mar 4 09:40:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kalyan Thota X-Patchwork-Id: 12115757 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, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 6F4C4C433E0 for ; Thu, 4 Mar 2021 09:42:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40EA464F0B for ; Thu, 4 Mar 2021 09:42:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237805AbhCDJlv (ORCPT ); Thu, 4 Mar 2021 04:41:51 -0500 Received: from alexa-out.qualcomm.com ([129.46.98.28]:61791 "EHLO alexa-out.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237769AbhCDJlk (ORCPT ); Thu, 4 Mar 2021 04:41:40 -0500 Received: from ironmsg-lv-alpha.qualcomm.com ([10.47.202.13]) by alexa-out.qualcomm.com with ESMTP; 04 Mar 2021 01:41:00 -0800 X-QCInternal: smtphost Received: from ironmsg02-blr.qualcomm.com ([10.86.208.131]) by ironmsg-lv-alpha.qualcomm.com with ESMTP/TLS/AES256-SHA; 04 Mar 2021 01:40:58 -0800 X-QCInternal: smtphost Received: from kalyant-linux.qualcomm.com ([10.204.66.210]) by ironmsg02-blr.qualcomm.com with ESMTP; 04 Mar 2021 15:10:31 +0530 Received: by kalyant-linux.qualcomm.com (Postfix, from userid 94428) id C62D63D38; Thu, 4 Mar 2021 01:40:31 -0800 (PST) From: Kalyan Thota To: y@qualcomm.com, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, devicetree@vger.kernel.org Cc: Kalyan Thota , linux-kernel@vger.kernel.org, robdclark@gmail.com, dianders@chromium.org, mkrishn@codeaurora.org, dan.carpenter@oracle.com Subject: [v1] drm/msm/disp/dpu1: fix warning reported by kernel bot in dpu driver Date: Thu, 4 Mar 2021 01:40:29 -0800 Message-Id: <1614850829-31802-1-git-send-email-kalyan_t@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Fix a warning, pointing to an early deference of a variable before check. This bug was introduced in the following commit. commit 4259ff7ae509 ("drm/msm/dpu: add support for pcc color block in dpu driver") Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Kalyan Thota --- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c index a7a2453..0f9974c 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.c @@ -26,10 +26,16 @@ static void dpu_setup_dspp_pcc(struct dpu_hw_dspp *ctx, struct dpu_hw_pcc_cfg *cfg) { - u32 base = ctx->cap->sblk->pcc.base; + u32 base; - if (!ctx || !base) { - DRM_ERROR("invalid ctx %pK pcc base 0x%x\n", ctx, base); + if (!ctx) { + DRM_ERROR("invalid dspp ctx %pK\n", ctx); + return; + } + + base = ctx->cap->sblk->pcc.base; + if (!base) { + DRM_ERROR("invalid pcc base 0x%x\n", base); return; }