drm/i915: BUG() if fences are used on unsupported platform

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index d15c86279d02..ad03dea210bd 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2649,7 +2649,7 @@ static void i915_gem_write_fence(struct drm_device *dev, int reg,
         case 4: i965_write_fence_reg(dev, reg, obj); break;
         case 3: i915_write_fence_reg(dev, reg, obj); break;
         case 2: i830_write_fence_reg(dev, reg, obj); break;
-        default: break;
+        default: BUG();
         }
 }
 
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 551f370657b7..6ba0573e7f16 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1106,6 +1106,8 @@ static void i915_gem_record_fences(struct drm_device *dev,
                         error->fence[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
                 break;
 
+        default:
+                BUG();
         }
 }