linux-kernel - Re: [PATCH] drm/etnaviv: Remove duplicate call to drm_gem_free_mmap

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Date:   Wed, 6 Jul 2022 11:31:48 -0700
From:   "T.J. Mercier" <tjmercier@...gle.com>
To:     "T.J. Mercier" <tjmercier@...gle.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Russell King <linux+etnaviv@...linux.org.uk>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     etnaviv@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/etnaviv: Remove duplicate call to drm_gem_free_mmap_offset

On Wed, Jul 6, 2022 at 11:29 AM T.J. Mercier <tjmercier@...gle.com> wrote:
>
> The docs explicitly say the drm_gem_object_release function already calls this,
> and this does not appear to be a prerequisite for the call to
> etnaviv_gem_ops.release.
>
> Signed-off-by: T.J. Mercier <tjmercier@...gle.com>
> ---
>  drivers/gpu/drm/etnaviv/etnaviv_gem.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> index cc386f8a7116..ecb828e4e156 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> @@ -504,7 +504,6 @@ void etnaviv_gem_free_object(struct drm_gem_object *obj)
>                 kfree(mapping);
>         }
>
> -       drm_gem_free_mmap_offset(obj);
>         etnaviv_obj->ops->release(etnaviv_obj);
>         drm_gem_object_release(obj);
>
> --
> 2.37.0.rc0.161.g10f37bed90-goog
>

I don't have a device to test this with, but I believe this is correct
based on inspecting the code and the drm_gem_free_mmap_offset function
docs.