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drm/ttm: Quick-test mmap offset in ttm_bo_mmap()

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A BO's address has to be at least the minimum offset. Sharing this
test in ttm_bo_mmap() removes code from drivers. A full buffer-address
validation is still done within drm_vma_offset_lockup_locked().

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Thomas Zimmermann
2019-02-07 09:59:30 +01:00
committed by Alex Deucher
parent 7d1500f9fb
commit bed2dd8421
12 changed files with 23 additions and 77 deletions
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11
drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c
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@@ -30,16 +30,9 @@
int vmw_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
struct vmw_private *dev_priv;
struct drm_file *file_priv = filp->private_data;
struct vmw_private *dev_priv = vmw_priv(file_priv->minor->dev);
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
DRM_ERROR("Illegal attempt to mmap old fifo space.\n");
return -EINVAL;
}
file_priv = filp->private_data;
dev_priv = vmw_priv(file_priv->minor->dev);
return ttm_bo_mmap(filp, vma, &dev_priv->bdev);
}