[Intel-gfx] [PATCH v4 36/61] drm/i915: Add ww locking to dma-buf ops.

[Thomas Hellström (Intel)]

On 10/16/20 12:44 PM, Maarten Lankhorst wrote:
> vmap is using pin_pages, but needs to use ww locking,
> add pin_pages_unlocked to correctly lock the mapping.
>
> Also add ww locking to begin/end cpu access.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> ---

Reviewed-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>