From patchwork Fri Jul 8 16:26:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 588620 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B26E1C433EF for ; Fri, 8 Jul 2022 16:25:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239283AbiGHQZO (ORCPT ); Fri, 8 Jul 2022 12:25:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239285AbiGHQYc (ORCPT ); Fri, 8 Jul 2022 12:24:32 -0400 Received: from mail-ot1-x32c.google.com (mail-ot1-x32c.google.com [IPv6:2607:f8b0:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E734280489 for ; Fri, 8 Jul 2022 09:24:04 -0700 (PDT) Received: by mail-ot1-x32c.google.com with SMTP id t26-20020a9d775a000000b006168f7563daso16561747otl.2 for ; Fri, 08 Jul 2022 09:24:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=eS1DoT862v/g6EpjvGHfLBntfCPBUFxV6o7NJazJK14=; b=hSRsjqZkDb6SyYnQtxvHdml60HsCjB3dzHLzVc+Sn2nCDLpjUIt0dvvYQEP4Utv8dp HJ4UVRDAwVrjvDJlMu1KWwignFae8tPFXKxvx7w67BsfotkF0yCeNJpCq93RE79nvUPR a9/RELWNRH58jLvHLFSo559skengu9ebIkY9qFdA3GmDMtcX249eLdFy15rFNHv4HhIG 0OPUsVbAD5efrQapJLvTX2j7ZYGpV3Yo5UuU445XhnUTajLmuVDfgNnmSZgTWUCvD4cO sshWnVjlDI2wpye7wqBbHjpGgI57nlHFi82d3ln8eARWnN2zIdGS4XSIQQa10QOFAmFK hgLA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=eS1DoT862v/g6EpjvGHfLBntfCPBUFxV6o7NJazJK14=; b=4ZfMX2kamjrHVMY0CXBoxNAPlZLzjuoLQN2YXYA2O67C15KeZntzn0NiaI24xgS5/0 Hj0L7c4cBelnAcX+WSsbiuLw79CmYAhaFTiEEgqDwBW3IBBf9+anzEkQGtGt6x5fWUDV iBnz8HcNEUd90zS9k4Qz1+XA/IFCHr04gCJ8s5N9RT+EVawc8km2MZrjJCmp3gFL3ok+ 2F/cipifWGHEs53w+MTevgnaUYvQObhkjrywwynIG5Jgv2XfmQXOHoWgI1gNiEyK+KeL EeWJiZjMtaboHlW+u1xxclOcPV9Q8Z5hx2vOuJJVcDnNV0JdIs/QmMJBsyopqGPXjaLc PFCw== X-Gm-Message-State: AJIora+tPUaAOu6MoMqEEMLdpbRc54/EIsIg/qj2NT1MUXmyY2rU5D51 bEzjcM8NC8HHNAZr6b8pakKVVg== X-Google-Smtp-Source: AGRyM1sHmxfIFe72kNMrpQnCwtapr6QU9N20Rtq+AQ0mLbpRLwO90rb6TwTmApYnhVPsNOLGXUit5Q== X-Received: by 2002:a05:6830:cf:b0:61c:265b:1d1e with SMTP id x15-20020a05683000cf00b0061c265b1d1emr1862647oto.290.1657297439983; Fri, 08 Jul 2022 09:23:59 -0700 (PDT) Received: from ripper.. (104-57-184-186.lightspeed.austtx.sbcglobal.net. [104.57.184.186]) by smtp.gmail.com with ESMTPSA id f8-20020a056871070800b00101bd4914f9sm6678663oap.43.2022.07.08.09.23.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Jul 2022 09:23:59 -0700 (PDT) From: Bjorn Andersson To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov Cc: Sean Paul , David Airlie , Daniel Vetter , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/msm/gpu: Drop qos request if devm_devfreq_add_device() fails Date: Fri, 8 Jul 2022 09:26:32 -0700 Message-Id: <20220708162632.3529864-1-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In the event that devm_devfreq_add_device() fails the device's qos freq list is left referencing df->idle_freq and df->boost_freq. Attempting to initialize devfreq again after a probe deferral will then cause invalid memory accesses in dev_pm_qos_add_request(). Fix this by dropping the requests in the error path. Fixes: 7c0ffcd40b16 ("drm/msm/gpu: Respect PM QoS constraints") Signed-off-by: Bjorn Andersson Reviewed-by: Rob Clark Reviewed-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/msm_gpu_devfreq.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c b/drivers/gpu/drm/msm/msm_gpu_devfreq.c index c2ea978c8921..21e271a318ee 100644 --- a/drivers/gpu/drm/msm/msm_gpu_devfreq.c +++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c @@ -198,6 +198,8 @@ void msm_devfreq_init(struct msm_gpu *gpu) if (IS_ERR(df->devfreq)) { DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n"); + dev_pm_qos_remove_request(&df->idle_freq); + dev_pm_qos_remove_request(&df->boost_freq); df->devfreq = NULL; return; }