[PATCH 15/25] drm/gma500: Drop dev->struct_mutex from mmap offset function

[Patrik Jakobsson]

On Thu, Oct 15, 2015 at 9:36 AM, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:
> Simply forgotten about this when I was doing my general cleansing of
> simple gem mmap offset functions. There's nothing but core functions
> called here, and they all have their own protection already.
>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>

+1 for removing that stale comment as well

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson at gmail.com>

> ---
>  drivers/gpu/drm/gma500/gem.c | 13 +++----------
>  1 file changed, 3 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
> index e3bdc8b1c32c..f0357f525f56 100644
> --- a/drivers/gpu/drm/gma500/gem.c
> +++ b/drivers/gpu/drm/gma500/gem.c
> @@ -62,15 +62,10 @@ int psb_gem_dumb_map_gtt(struct drm_file *file, struct drm_device *dev,
>         int ret = 0;
>         struct drm_gem_object *obj;
>
> -       mutex_lock(&dev->struct_mutex);
> -
>         /* GEM does all our handle to object mapping */
>         obj = drm_gem_object_lookup(dev, file, handle);
> -       if (obj == NULL) {
> -               ret = -ENOENT;
> -               goto unlock;
> -       }
> -       /* What validation is needed here ? */
> +       if (obj == NULL)
> +               return -ENOENT;
>
>         /* Make it mmapable */
>         ret = drm_gem_create_mmap_offset(obj);
> @@ -78,9 +73,7 @@ int psb_gem_dumb_map_gtt(struct drm_file *file, struct drm_device *dev,
>                 goto out;
>         *offset = drm_vma_node_offset_addr(&obj->vma_node);
>  out:
> -       drm_gem_object_unreference(obj);
> -unlock:
> -       mutex_unlock(&dev->struct_mutex);
> +       drm_gem_object_unreference_unlocked(obj);
>         return ret;
>  }
>
> --
> 2.5.1
>
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