vkms_vblank_simulate() uses WARN_ON for timing-dependent condition
(timer overrun). This is a mis-use of WARN_ON, WARN_ON must be used
to denote kernel bugs. Use pr_warn() instead.
Signed-off-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Reported-by: syzbot+4fc21a003c8332eb0bdd@xxxxxxxxxxxxxxxxxxxxxxxxx
Cc: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx>
Cc: Melissa Wen <melissa.srw@xxxxxxxxx>
Cc: Haneen Mohammed <hamohammed.sa@xxxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Change-Id: I7f01c288092bc7e472ec63af198f93ce3d8c49f7
---
drivers/gpu/drm/vkms/vkms_crtc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index 0443b7deeaef6..758d8a98d96b3 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -18,7 +18,8 @@ static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer,
output->period_ns);
- WARN_ON(ret_overrun != 1);
+ if (ret_overrun != 1)
+ pr_warn("%s: vblank timer overrun\n", __func__);
spin_lock(&output->lock);
ret = drm_crtc_handle_vblank(crtc);
base-commit: e94c55b8e0a0bbe9a026250cf31e2fa45957d776
--
2.31.0.291.g576ba9dcdaf-goog
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