[Intel-gfx] [PATCH v4 18/61] drm/i915: Make ring submission compatible with obj->mm.lock removal, v2.

[Thomas Hellström (Intel)]

On 10/16/20 12:44 PM, Maarten Lankhorst wrote:
> We map the initial context during first pin.
>
> This allows us to remove pin_map from state allocation, which saves
> us a few retry loops. We won't need this until first pin anyway.
>
> intel_ring_submission_setup() is also reworked slightly to do all
> pinning in a single ww loop.
>
> Changes since v1:
> - Handle -EDEADLK backoff in intel_ring_submission_setup() better.
> - Handle smatch errors reported by Dan and testbot.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Reported-by: kernel test robot <lkp at intel.com>
> Reported-by: Dan Carpenter <dan.carpenter at oracle.com>

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