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Message-ID: <47c5b64e-b765-41be-b58b-cdc83edeca49@collabora.com>
Date:   Mon, 24 Oct 2022 22:36:54 +0300
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Subject: Re: [PATCH v1] drm: Switch drm_client_buffer_delete() to unlocked
 drm_gem_vunmap
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From:   Dmitry Osipenko <dmitry.osipenko@collabora.com>
To:     Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>
Cc:     dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
References: <20221020213335.309092-1-dmitry.osipenko@collabora.com>
In-Reply-To: <20221020213335.309092-1-dmitry.osipenko@collabora.com>
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On 10/21/22 00:33, Dmitry Osipenko wrote:
> The drm_client_buffer_delete() wasn't switched to unlocked GEM vunmapping
> by accident when rest of drm_client code transitioned to the unlocked
> variants of the vmapping functions. Make drm_client_buffer_delete() use
> the unlocked variant. This fixes lockdep warning splat about missing
> reservation lock when framebuffer is released.
> 
> Reported-by: kernel test robot <yujie.liu@intel.com>
> Link: https://lore.kernel.org/dri-devel/890f70db-68b0-8456-ca3c-c5496ef90517@collabora.com/T/
> Fixes: 79e2cf2e7a19 ("drm/gem: Take reservation lock for vmap/vunmap operations")
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
> ---
>  drivers/gpu/drm/drm_client.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
> index fbcb1e995384..38e1be991caa 100644
> --- a/drivers/gpu/drm/drm_client.c
> +++ b/drivers/gpu/drm/drm_client.c
> @@ -235,7 +235,7 @@ static void drm_client_buffer_delete(struct drm_client_buffer *buffer)
>  {
>  	struct drm_device *dev = buffer->client->dev;
>  
> -	drm_gem_vunmap(buffer->gem, &buffer->map);
> +	drm_gem_vunmap_unlocked(buffer->gem, &buffer->map);
>  
>  	if (buffer->gem)
>  		drm_gem_object_put(buffer->gem);

Applied to misc-next

-- 
Best regards,
Dmitry