Turn a fatal lockup into a merely blank display with lots of shouty
messages.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
drivers/gpu/drm/i915/intel_display.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 12dba60..a679a9a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1524,7 +1524,11 @@ static void intel_disable_pch_pll(struct intel_crtc *intel_crtc)
pll->pll_reg, pll->active, pll->on,
intel_crtc->base.base.id);
- BUG_ON(pll->active == 0);
+ if (WARN_ON(pll->active == 0)) {
+ assert_pch_pll_disabled(dev_priv, intel_crtc);
+ return;
+ }
+
if (--pll->active) {
assert_pch_pll_enabled(dev_priv, intel_crtc);
return;
--
1.7.10
