Re: [PATCH 6/8] drm/vmwgfx: Inline ttm_bo_mmap() into vmwgfx driver

[Zack Rusin <zackr@vmware.com>]

On 4/6/21 5:09 AM, Thomas Zimmermann wrote:
> The vmwgfx driver is the only remaining user of ttm_bo_mmap(). Inline
> the code. The internal helper ttm_bo_vm_lookup() is now also part of
> vmwgfx as vmw_bo_vm_lookup().
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---
>   drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c | 54 ++++++++++++++++++++++--
>   1 file changed, 51 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c
> index cb9975889e2f..3eaad00668f2 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c
> @@ -27,6 +27,30 @@
>   
>   #include "vmwgfx_drv.h"
>   
> +static struct ttm_buffer_object *vmw_bo_vm_lookup(struct ttm_device *bdev,
> +						  unsigned long offset,
> +						  unsigned long pages)
> +{
> +	struct drm_vma_offset_node *node;
> +	struct ttm_buffer_object *bo = NULL;
> +
> +	drm_vma_offset_lock_lookup(bdev->vma_manager);
> +
> +	node = drm_vma_offset_lookup_locked(bdev->vma_manager, offset, pages);
> +	if (likely(node)) {
> +		bo = container_of(node, struct ttm_buffer_object,
> +				  base.vma_node);
> +		bo = ttm_bo_get_unless_zero(bo);
> +	}
> +
> +	drm_vma_offset_unlock_lookup(bdev->vma_manager);
> +
> +	if (!bo)
> +		pr_err("Could not find buffer object to map\n");

It's not a big deal and I know it's been in the original, but since 
you're already in there if you could change this to DRM_ERR that'd be 
great. Either way:
Reviewed-by: Zack Rusin <zackr@vmware.com>

z
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