From: Chris Wilson Date: Wed, 11 Feb 2009 14:26:44 +0000 (+0000) Subject: drm/i915: First recheck for an empty fence register. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9b2412f9ad0a3913baa40c270d6e1fa3c6d50067;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: First recheck for an empty fence register. If we wait upon a request and successfully unbind a buffer occupying a fence register, then that slot will be freed and cause a NULL derefrence upon rescanning. Signed-off-by: Chris Wilson Signed-off-by: Eric Anholt --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index c94069b28a47..6497c1ad02d3 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1580,6 +1580,7 @@ i915_gem_object_get_fence_reg(struct drm_gem_object *obj, bool write) } /* First try to find a free reg */ +try_again: for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) { reg = &dev_priv->fence_regs[i]; if (!reg->obj) @@ -1591,7 +1592,6 @@ i915_gem_object_get_fence_reg(struct drm_gem_object *obj, bool write) struct drm_i915_gem_object *old_obj_priv = NULL; loff_t offset; -try_again: /* Could try to use LRU here instead... */ for (i = dev_priv->fence_reg_start; i < dev_priv->num_fence_regs; i++) {