drm/panthor: Unlock the locked region before disabling an AS

Browse source

An AS can be disabled in the middle of a VM operation (VM being
evicted from an AS slot, for instance). In that case, we need the
locked section to be unlocked before releasing the slot.

v2:
- Add an lockdep_assert_held() in panthor_mmu_as_disable()
- Collect R-bs

v3:
- Don't reset the locked_region range in the as_disable() path

Fixes: 6e2d3b3e85 ("drm/panthor: Add support for atomic page table updates")
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patch.msgid.link/20251203121750.404340-4-boris.brezillon@collabora.com

...

This commit is contained in:

Boris Brezillon 2025-12-03 13:17:50 +01:00 • committed by Liviu Dudau

parent 32e593d74c

commit 276e411604

1 changed files with 10 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

10

drivers/gpu/drm/panthor/panthor_mmu.c

View file