From: Christian König Date: Tue, 2 Apr 2019 14:28:13 +0000 (+0200) Subject: drm/amd/display: wait for fence without holding reservation lock X-Git-Tag: v5.2-rc1~118^2~4^2~30 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2fac0f53fe5921264c525a0439ee9baf0fe9ada1;p=thirdparty%2Flinux.git drm/amd/display: wait for fence without holding reservation lock Don't block others while waiting for the fences to finish, concurrent submission is perfectly valid in this case and holding the lock can prevent killed applications from terminating. Signed-off-by: Christian König Reviewed-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index fb248984b7ba4..36331e70fa835 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5205,23 +5205,26 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state, continue; } + abo = gem_to_amdgpu_bo(fb->obj[0]); + + /* Wait for all fences on this FB */ + r = reservation_object_wait_timeout_rcu(abo->tbo.resv, true, + false, + MAX_SCHEDULE_TIMEOUT); + WARN_ON(r < 0); + /* * TODO This might fail and hence better not used, wait * explicitly on fences instead * and in general should be called for * blocking commit to as per framework helpers */ - abo = gem_to_amdgpu_bo(fb->obj[0]); r = amdgpu_bo_reserve(abo, true); if (unlikely(r != 0)) { DRM_ERROR("failed to reserve buffer before flip\n"); WARN_ON(1); } - /* Wait for all fences on this FB */ - WARN_ON(reservation_object_wait_timeout_rcu(abo->tbo.resv, true, false, - MAX_SCHEDULE_TIMEOUT) < 0); - amdgpu_bo_get_tiling_flags(abo, &tiling_flags); amdgpu_bo_unreserve(abo);