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SubjectRe: [PATCH 1/3] drm/vc4: Fix double destroy of the BO cache on teardown.
On Wed,  2 Aug 2017 13:32:40 -0700
Eric Anholt <eric@anholt.net> wrote:

> It's also destroyed from the top level vc4_drv.c initialization, which
> is where the cache was actually initialized from.
>
> This used to just involve duplicate del_timer() and cancel_work_sync()
> being called, but it started causing kmalloc issues once we
> double-freed the new BO label array.
>
> Fixes: 1908a876f909 ("drm/vc4: Add an ioctl for labeling GEM BOs for summary stats")
> Signed-off-by: Eric Anholt <eric@anholt.net>

Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>

> ---
> drivers/gpu/drm/vc4/vc4_gem.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
> index 209fccd0d3b4..892a031a3ced 100644
> --- a/drivers/gpu/drm/vc4/vc4_gem.c
> +++ b/drivers/gpu/drm/vc4/vc4_gem.c
> @@ -1117,6 +1117,4 @@ vc4_gem_destroy(struct drm_device *dev)
>
> if (vc4->hang_state)
> vc4_free_hang_state(dev, vc4->hang_state);
> -
> - vc4_bo_cache_destroy(dev);
> }

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