* [patch] i915: fix impossible BUG_ON() test
@ 2010-10-27 21:25 Dan Carpenter
2010-10-27 21:30 ` Chris Wilson
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2010-10-27 21:25 UTC (permalink / raw)
To: Chris Wilson; +Cc: kernel-janitors, dri-devel
obj_priv->pin_count is unsigned so the BUG_ON(obj_priv->pin_count < 0)
will never trigger.
Signed-off-by: Dan Carpenter <error27@gmail.com>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 8eb8453..151d9c8 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4082,10 +4082,11 @@ i915_gem_object_unpin(struct drm_gem_object *obj)
struct drm_i915_gem_object *obj_priv = to_intel_bo(obj);
WARN_ON(i915_verify_lists(dev));
- obj_priv->pin_count--;
- BUG_ON(obj_priv->pin_count < 0);
+ BUG_ON(obj_priv->pin_count = 0);
BUG_ON(obj_priv->gtt_space = NULL);
+ obj_priv->pin_count--;
+
/* If the object is no longer pinned, and is
* neither active nor being flushed, then stick it on
* the inactive list
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [patch] i915: fix impossible BUG_ON() test
2010-10-27 21:25 [patch] i915: fix impossible BUG_ON() test Dan Carpenter
@ 2010-10-27 21:30 ` Chris Wilson
0 siblings, 0 replies; 2+ messages in thread
From: Chris Wilson @ 2010-10-27 21:30 UTC (permalink / raw)
To: Dan Carpenter; +Cc: kernel-janitors, dri-devel
On Wed, 27 Oct 2010 23:25:34 +0200, Dan Carpenter <error27@gmail.com> wrote:
> obj_priv->pin_count is unsigned so the BUG_ON(obj_priv->pin_count < 0)
> will never trigger.
I have the same change pending, but not queued for -fixes since it is
impossible.
Thanks,
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
^ permalink raw reply [flat|nested] 2+ messages in thread
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