[Intel-gfx] [PATCH 4/6] drm/ttm: Force re-init if ttm_global_init() fails

[Daniel Vetter]

On Wed, Jul 21, 2021 at 10:23:56AM -0500, Jason Ekstrand wrote:
> If we have a failure, decrement the reference count so that the next
> call to ttm_global_init() will actually do something instead of assume
> everything is all set up.
> 
> Signed-off-by: Jason Ekstrand <jason at jlekstrand.net>
> Fixes: 62b53b37e4b1 ("drm/ttm: use a static ttm_bo_global instance")
> Reviewed-by: Christian König <christian.koenig at amd.com>

This one is already in drm-misc-fixes.
-Daniel

> ---
>  drivers/gpu/drm/ttm/ttm_device.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
> index 5f31acec3ad76..519deea8e39b7 100644
> --- a/drivers/gpu/drm/ttm/ttm_device.c
> +++ b/drivers/gpu/drm/ttm/ttm_device.c
> @@ -100,6 +100,8 @@ static int ttm_global_init(void)
>  	debugfs_create_atomic_t("buffer_objects", 0444, ttm_debugfs_root,
>  				&glob->bo_count);
>  out:
> +	if (ret)
> +		--ttm_glob_use_count;
>  	mutex_unlock(&ttm_global_mutex);
>  	return ret;
>  }
> -- 
> 2.31.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch