From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BD67FFBEA for ; Mon, 15 May 2023 17:08:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 327A1C433D2; Mon, 15 May 2023 17:08:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684170513; bh=q6AzAGrTG8ArFQN82EMIcsu59wUViAOx8XuiCJeb2zI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jzD7d2iTuXlTZVmgP7pyr9GxFKDw0LVQU2EHOzSdj2f1VnyHesQ8/UpmJ+01/fpfw T9c9TN4FN15XJBlgDE/+RdyC5Ri+FAVR7wFPhCcbCxGnM+5O98LTGBqpTZkryTN+Q8 ULkvVkI6hu+afMVCAjWaKzNcv/vXLSk0Duz2162Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold , Rob Clark Subject: [PATCH 6.1 147/239] drm/msm/adreno: fix runtime PM imbalance at gpu load Date: Mon, 15 May 2023 18:26:50 +0200 Message-Id: <20230515161726.094047552@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230515161721.545370111@linuxfoundation.org> References: <20230515161721.545370111@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Johan Hovold commit 0d997f95b70f98987ae031a89677c13e0e223670 upstream. A recent commit moved enabling of runtime PM to GPU load time (first open()) but failed to update the error paths so that runtime PM is disabled if initialisation of the GPU fails. This would trigger a warning about the unbalanced disable count on the next open() attempt. Note that pm_runtime_put_noidle() is sufficient to balance the usage count when pm_runtime_put_sync() fails (and is chosen over pm_runtime_resume_and_get() for consistency reasons). Fixes: 4b18299b3365 ("drm/msm/adreno: Defer enabling runpm until hw_init()") Cc: stable@vger.kernel.org # 6.0 Signed-off-by: Johan Hovold Patchwork: https://patchwork.freedesktop.org/patch/524971/ Link: https://lore.kernel.org/r/20230303164807.13124-3-johan+linaro@kernel.org Signed-off-by: Rob Clark Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/msm/adreno/adreno_device.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) --- a/drivers/gpu/drm/msm/adreno/adreno_device.c +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c @@ -440,20 +440,21 @@ struct msm_gpu *adreno_load_gpu(struct d ret = pm_runtime_get_sync(&pdev->dev); if (ret < 0) { - pm_runtime_put_sync(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); DRM_DEV_ERROR(dev->dev, "Couldn't power up the GPU: %d\n", ret); - return NULL; + goto err_disable_rpm; } mutex_lock(&gpu->lock); ret = msm_gpu_hw_init(gpu); mutex_unlock(&gpu->lock); - pm_runtime_put_autosuspend(&pdev->dev); if (ret) { DRM_DEV_ERROR(dev->dev, "gpu hw init failed: %d\n", ret); - return NULL; + goto err_put_rpm; } + pm_runtime_put_autosuspend(&pdev->dev); + #ifdef CONFIG_DEBUG_FS if (gpu->funcs->debugfs_init) { gpu->funcs->debugfs_init(gpu, dev->primary); @@ -462,6 +463,13 @@ struct msm_gpu *adreno_load_gpu(struct d #endif return gpu; + +err_put_rpm: + pm_runtime_put_sync(&pdev->dev); +err_disable_rpm: + pm_runtime_disable(&pdev->dev); + + return NULL; } static int find_chipid(struct device *dev, struct adreno_rev *rev)