[PATCH v4 14/17] drm/qxl: drop qxl_ttm_fault

[Gerd Hoffmann]

Not sure what this hook is supposed to do.  vmf->vma->vm_private_data
should never be NULL, so the extra check in qxl_ttm_fault should have no
effect.

Drop it.

Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
---
 drivers/gpu/drm/qxl/qxl_ttm.c | 27 +--------------------------
 1 file changed, 1 insertion(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
index 3a24145dd516..41edbde0e37e 100644
--- a/drivers/gpu/drm/qxl/qxl_ttm.c
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -48,24 +48,8 @@ static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
 	return qdev;
 }
 
-static struct vm_operations_struct qxl_ttm_vm_ops;
-static const struct vm_operations_struct *ttm_vm_ops;
-
-static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf)
-{
-	struct ttm_buffer_object *bo;
-	vm_fault_t ret;
-
-	bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
-	if (bo == NULL)
-		return VM_FAULT_NOPAGE;
-	ret = ttm_vm_ops->fault(vmf);
-	return ret;
-}
-
 int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
 {
-	int r;
 	struct drm_file *file_priv = filp->private_data;
 	struct qxl_device *qdev = file_priv->minor->dev->dev_private;
 
@@ -77,16 +61,7 @@ int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
 	DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
 		  filp->private_data, vma->vm_pgoff);
 
-	r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
-	if (unlikely(r != 0))
-		return r;
-	if (unlikely(ttm_vm_ops == NULL)) {
-		ttm_vm_ops = vma->vm_ops;
-		qxl_ttm_vm_ops = *ttm_vm_ops;
-		qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
-	}
-	vma->vm_ops = &qxl_ttm_vm_ops;
-	return 0;
+	return ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
 }
 
 static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
-- 
2.18.1