From: Alex Hung <[email protected]> [ Upstream commit ae13c8a5cff92015b9a3eb7cee65ebc75859487f ]
[WHY & HOW] A read of acrtc_attach->base.state->event was not locked so moving it inside the spinlock. This fixes a LOCK_EVASION issue reported by Coverity. Reviewed-by: Harry Wentland <[email protected]> Acked-by: Tom Chung <[email protected]> Signed-off-by: Alex Hung <[email protected]> Tested-by: Daniel Wheeler <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) 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 5eef17f092ceb..875661737f496 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -8370,15 +8370,13 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state, bundle->stream_update.vrr_infopacket = &acrtc_state->stream->vrr_infopacket; } - } else if (cursor_update && acrtc_state->active_planes > 0 && - acrtc_attach->base.state->event) { - drm_crtc_vblank_get(pcrtc); - + } else if (cursor_update && acrtc_state->active_planes > 0) { spin_lock_irqsave(&pcrtc->dev->event_lock, flags); - - acrtc_attach->event = acrtc_attach->base.state->event; - acrtc_attach->base.state->event = NULL; - + if (acrtc_attach->base.state->event) { + drm_crtc_vblank_get(pcrtc); + acrtc_attach->event = acrtc_attach->base.state->event; + acrtc_attach->base.state->event = NULL; + } spin_unlock_irqrestore(&pcrtc->dev->event_lock, flags); } -- 2.43.0
