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drm/i915: Replace nondescript 'WARN_ON(!lret)' with a sensible error message 

When a vblank wait times out in intel_atomic_wait_for_vblanks() we just
get a cryptic 'WARN_ON(!ret)' backtrace in dmesg. Repace it with
something that tells you what actually happened.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460978973-24945-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
This commit is contained in:
Ville Syrjälä 2016-04-18 14:29:32 +03:00
parent acf4e84d61
commit 8a8dae260f
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -13526,7 +13526,7 @@ static void intel_atomic_wait_for_vblanks(struct drm_device *dev,
drm_crtc_vblank_count(crtc),
msecs_to_jiffies(50));
WARN_ON(!lret);
WARN(!lret, "pipe %c vblank wait timed out\n", pipe_name(pipe));
drm_crtc_vblank_put(crtc);
}