On 21/10/2022 10:55, Anshuman Gupta wrote:
We had already grabbed the rpm wakeref at obj destruction path,
but it also required to grab the wakeref when object moves.
When i915_gem_object_release_mmap_offset() gets called by
i915_ttm_move_notify(), it will release the mmap offset without
grabbing the wakeref. We want to avoid that therefore,
grab the wakeref at i915_ttm_unmap_virtual() accordingly.
While doing that also changed the lmem_userfault_lock from
mutex to spinlock, as spinlock widely used for list.
Also changed if (obj->userfault_count) to
GEM_BUG_ON(!obj->userfault_count).
v2:
- Removed lmem_userfault_{list,lock} from intel_gt. [Matt Auld]
Fixes: ad74457a6b5a ("drm/i915/dgfx: Release mmap on rpm suspend")
Suggested-by: Matthew Auld <matthew.auld@xxxxxxxxx>
Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>
