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| author | Eric Anholt <eric@anholt.net> | 2009-01-27 10:33:49 -0800 |
|---|---|---|
| committer | Dave Airlie <airlied@linux.ie> | 2009-02-08 21:37:56 +1000 |
| commit | d9ddcb96e05cfbadf3dbf66859bcaf5eae25af0b (patch) | |
| tree | ee7b3f9b95f21d8489240578e42f35e6964bc952 /drivers | |
| parent | ab657db12d7020629f26f30d287558a8d0e32b41 (diff) | |
| download | linux-d9ddcb96e05cfbadf3dbf66859bcaf5eae25af0b.tar.gz linux-d9ddcb96e05cfbadf3dbf66859bcaf5eae25af0b.tar.bz2 linux-d9ddcb96e05cfbadf3dbf66859bcaf5eae25af0b.zip | |
drm/i915: Return error from i915_gem_object_get_fence_reg() when failing.
Previously, the caller would continue along without knowing that the
function failed, resulting in potential mis-rendering. Right now vm_fault
just returns SIGBUS in that case, and we may need to disable signal handling
to avoid that happening.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index af8034d52511..e1f831f166ca 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -52,7 +52,7 @@ static void i915_gem_object_free_page_list(struct drm_gem_object *obj); static int i915_gem_object_wait_rendering(struct drm_gem_object *obj); static int i915_gem_object_bind_to_gtt(struct drm_gem_object *obj, unsigned alignment); -static void i915_gem_object_get_fence_reg(struct drm_gem_object *obj); +static int i915_gem_object_get_fence_reg(struct drm_gem_object *obj); static void i915_gem_clear_fence_reg(struct drm_gem_object *obj); static int i915_gem_evict_something(struct drm_device *dev); static int i915_gem_phys_pwrite(struct drm_device *dev, struct drm_gem_object *obj, @@ -585,8 +585,11 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) /* Need a new fence register? */ if (obj_priv->fence_reg == I915_FENCE_REG_NONE && - obj_priv->tiling_mode != I915_TILING_NONE) - i915_gem_object_get_fence_reg(obj); + obj_priv->tiling_mode != I915_TILING_NONE) { + ret = i915_gem_object_get_fence_reg(obj); + if (ret != 0) + return VM_FAULT_SIGBUS; + } pfn = ((dev->agp->base + obj_priv->gtt_offset) >> PAGE_SHIFT) + page_offset; @@ -1513,7 +1516,7 @@ static void i830_write_fence_reg(struct drm_i915_fence_reg *reg) * It then sets up the reg based on the object's properties: address, pitch * and tiling format. */ -static void +static int i915_gem_object_get_fence_reg(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; @@ -1563,10 +1566,11 @@ try_again: * objects to finish before trying again. */ if (i == dev_priv->num_fence_regs) { - ret = i915_gem_object_wait_rendering(reg->obj); + ret = i915_gem_object_set_to_gtt_domain(reg->obj, 0); if (ret) { - WARN(ret, "wait_rendering failed: %d\n", ret); - return; + WARN(ret != -ERESTARTSYS, + "switch to GTT domain failed: %d\n", ret); + return ret; } goto try_again; } @@ -1591,6 +1595,8 @@ try_again: i915_write_fence_reg(reg); else i830_write_fence_reg(reg); + + return 0; } /** |