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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2021-05-25 17:10:49 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2021-05-26 20:56:05 +0200 |
| commit | ccd9fe972c4d083b8716205dc56acf55fd837ea0 (patch) | |
| tree | c5c64f2556e0f52f9f64d01aa053f2d89a88c87f /drivers/gpu/drm/ttm | |
| parent | drm/amdgpu: Fix clang warning: unused label 'exit' (diff) | |
| download | linux-ccd9fe972c4d083b8716205dc56acf55fd837ea0.tar.xz linux-ccd9fe972c4d083b8716205dc56acf55fd837ea0.zip | |
drm/ttm: Don't override vm_ops callbacks, if set
Drivers may want to set their own callbacks for a VM area. Only set
TTM's callbacks if the vm_ops field is clear.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210525151055.8174-2-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/ttm')
| -rw-r--r-- | drivers/gpu/drm/ttm/ttm_bo_vm.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index 7ff9fd551357..ff07dbc91c03 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -586,7 +586,12 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_device *bdev, static void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma) { - vma->vm_ops = &ttm_bo_vm_ops; + /* + * Drivers may want to override the vm_ops field. Otherwise we + * use TTM's default callbacks. + */ + if (!vma->vm_ops) + vma->vm_ops = &ttm_bo_vm_ops; /* * Note: We're transferring the bo reference to |