[PATCH 6/9] drm/radeon: handle lockup in delayed work, v5

From: Christian K?nig v5 (chk): complete rework, start when the first fence is emitted, stop when the last fence is signalled, make it work correctly with GPU resets, cleanup radeon_fence_wait_seq Signed-off-by: Maarten Lankhorst Signed-off-by: Christian K?nig --- drivers/

[PATCH 6/9] drm/radeon: handle lockup in delayed work, v5

From: Christian K?nig v5 (chk): complete rework, start when the first fence is emitted, stop when the last fence is signalled, make it work correctly with GPU resets, cleanup radeon_fence_wait_seq Signed-off-by: Maarten Lankhorst Signed-off-by: Christian K?nig --- drivers/