[1/4] drm/i915: Remove assertion from raw __i915_vma_unpin()

Submitted by Chris Wilson on July 21, 2017, 2:50 p.m.

Details

Message ID 20170721145037.25105-2-chris@chris-wilson.co.uk
State New
Headers show
Series "Series without cover letter" ( rev: 1 ) in Intel GFX

Not browsing as part of any series.

Commit Message

Chris Wilson July 21, 2017, 2:50 p.m.
After we detect a i915_vma pin overflow, we call __i915_vma_unpin to
cleanup. However, on an overflow the pin_count bitfield will be zero,
triggering an assertion, even though we the intention is to merely warn
and report the error back to the user (as historically the culprit has
be a leak in the display code).

Fixes: 20dfbde463c8 ("drm/i915: Wrap vma->pin_count accessors with small inline helpers")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_vma.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 4a673fc1a432..20cf272c97b1 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -284,12 +284,12 @@  static inline void __i915_vma_pin(struct i915_vma *vma)
 
 static inline void __i915_vma_unpin(struct i915_vma *vma)
 {
-	GEM_BUG_ON(!i915_vma_is_pinned(vma));
 	vma->flags--;
 }
 
 static inline void i915_vma_unpin(struct i915_vma *vma)
 {
+	GEM_BUG_ON(!i915_vma_is_pinned(vma));
 	GEM_BUG_ON(!drm_mm_node_allocated(&vma->node));
 	__i915_vma_unpin(vma);
 }

Comments

On pe, 2017-07-21 at 15:50 +0100, Chris Wilson wrote:
> After we detect a i915_vma pin overflow, we call __i915_vma_unpin to
> cleanup. However, on an overflow the pin_count bitfield will be zero,
> triggering an assertion, even though we the intention is to merely warn
> and report the error back to the user (as historically the culprit has
> be a leak in the display code).
> 
> Fixes: 20dfbde463c8 ("drm/i915: Wrap vma->pin_count accessors with small inline helpers")
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

Regards, Joonas