[Intel-gfx] [PATCH] drm/i915: Repeat the GEM_BUG_ON message in the ftrace log

[Chris Wilson]

As the ftrace log is overflowing the pstore capture, we lose the gasps
from dmesg which includes the GEM_BUG_ON function:line and condition that
failed. Vital information for tracking down the bug, so append it to the
frace log as well.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_gem.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h
index e920dab7f1b8..d9f0709973d1 100644
--- a/drivers/gpu/drm/i915/i915_gem.h
+++ b/drivers/gpu/drm/i915/i915_gem.h
@@ -29,7 +29,10 @@
 
 #ifdef CONFIG_DRM_I915_DEBUG_GEM
 #define GEM_BUG_ON(condition) do { if (unlikely((condition))) {	\
-		printk(KERN_ERR "GEM_BUG_ON(%s)\n", __stringify(condition)); \
+		pr_err("%s:%d GEM_BUG_ON(%s)\n", \
+		       __func__, __LINE__, __stringify(condition)); \
+		GEM_TRACE("%s:%d GEM_BUG_ON(%s)\n", \
+			  __func__, __LINE__, __stringify(condition)); \
 		BUG(); \
 		} \
 	} while(0)
-- 
2.16.2