Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <37dae9fa-dadf-4b80-fbea-689472fd7dce@arm.com>
Date:   Thu, 28 Apr 2022 14:19:00 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.7.0
Subject: Re: [PATCH v5 01/17] drm/panfrost: Put mapping instead of shmem obj
 on panfrost_mmu_map_fault_addr() error
Content-Language: en-GB
To:     Dmitry Osipenko <dmitry.osipenko@collabora.com>,
        David Airlie <airlied@linux.ie>,
        Gerd Hoffmann <kraxel@redhat.com>,
        Gurchetan Singh <gurchetansingh@chromium.org>,
        Chia-I Wu <olvaffe@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
        Daniel Almeida <daniel.almeida@collabora.com>,
        Gert Wollny <gert.wollny@collabora.com>,
        Gustavo Padovan <gustavo.padovan@collabora.com>,
        Daniel Stone <daniel@fooishbar.org>,
        Tomeu Vizoso <tomeu.vizoso@collabora.com>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Rob Herring <robh@kernel.org>,
        Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>,
        Rob Clark <robdclark@gmail.com>,
        Emil Velikov <emil.l.velikov@gmail.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Qiang Yu <yuq825@gmail.com>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>
Cc:     dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        virtualization@lists.linux-foundation.org,
        Dmitry Osipenko <digetx@gmail.com>
References: <20220424190424.540501-1-dmitry.osipenko@collabora.com>
 <20220424190424.540501-2-dmitry.osipenko@collabora.com>
From:   Steven Price <steven.price@arm.com>
In-Reply-To: <20220424190424.540501-2-dmitry.osipenko@collabora.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 24/04/2022 20:04, Dmitry Osipenko wrote:
> When panfrost_mmu_map_fault_addr() fails, the BO's mapping should be
> unreferenced and not the shmem object that backs that mapping.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>

Fixes: bdefca2d8dc0 ("drm/panfrost: Add the panfrost_gem_mapping concept")

Reviewed-by: Steven Price <steven.price@arm.com>

Thanks,

Steve

> ---
>  drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> index d3f82b26a631..b285a8001b1d 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> @@ -518,7 +518,7 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
>  err_pages:
>  	drm_gem_shmem_put_pages(&bo->base);
>  err_bo:
> -	drm_gem_object_put(&bo->base.base);
> +	panfrost_gem_mapping_put(bomapping);
>  	return ret;
>  }
>