| From | Greg Kroah-Hartman <> | Subject | [ 126/171] drm/i915: Reduce a pin-leak BUG into a WARN | Date | Tue, 15 Jan 2013 14:44:51 -0800 |
| |
3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chris Wilson <chris@chris-wilson.co.uk>
commit 7e81a42e341a4f15d76624b7c02ffb21b085b56f upstream.
Pin-leaks persist and we get the perennial bug reports of machine lockups to the BUG_ON(pin_count==MAX). If we instead loudly report that the object cannot be pinned at that time it should prevent the driver from locking up, and hopefully restore a semblance of working whilst still leaving us a OOPS to debug.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Julien Cristau <jcristau@debian.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/i915/i915_gem.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3318,7 +3318,8 @@ i915_gem_object_pin(struct drm_i915_gem_ struct drm_i915_private *dev_priv = dev->dev_private; int ret; - BUG_ON(obj->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT); + if (WARN_ON(obj->pin_count == DRM_I915_GEM_OBJECT_MAX_PIN_COUNT)) + return -EBUSY; WARN_ON(i915_verify_lists(dev)); if (obj->gtt_space != NULL) {
|