From 068c6ff1cbbfc09eed2b892dd7b0572dd6737785 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sun, 29 Jan 2012 16:52:05 +0000 Subject: [PATCH] drm/i915: Remove the upper limit on the bo size for mapping into the CPU domain The original intention of comparing the bo against the mappable GTT limits was to prevent a subsequent faulting of the bo into the GTT from clearing the entire GTT in vain. However, that was clearly a cut'n'paste mistake as a CPU mapping never binds the bo into the aperture. Whilst there may be some merit to limiting the maximum size of the bo to something that can be utilized by the GPU, that limit itself does not belong as a safeguard to mmapping the bo, so remove the check entirely. Signed-off-by: Chris Wilson Reviewed-by: Eric Anholt Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 7219241..df23c62 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1141,7 +1141,6 @@ int i915_gem_mmap_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { - struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_mmap *args = data; struct drm_gem_object *obj; unsigned long addr; @@ -1153,11 +1152,6 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data, if (obj == NULL) return -ENOENT; - if (obj->size > dev_priv->mm.gtt_mappable_end) { - drm_gem_object_unreference_unlocked(obj); - return -E2BIG; - } - down_write(¤t->mm->mmap_sem); addr = do_mmap(obj->filp, 0, args->size, PROT_READ | PROT_WRITE, MAP_SHARED, -- 2.7.4