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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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9
drivers/gpu/drm/qxl/qxl_ttm.c
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@@ -63,15 +63,10 @@ static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf)
int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
struct qxl_device *qdev;
int r;
struct drm_file *file_priv = filp->private_data;
struct qxl_device *qdev = file_priv->minor->dev->dev_private;
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
return -EINVAL;
file_priv = filp->private_data;
qdev = file_priv->minor->dev->dev_private;
if (qdev == NULL) {
DRM_ERROR(
"filp->private_data->minor->dev->dev_private == NULL\n");