Re: [PATCH 18/32] drm: Populate fb->dev from drm_helper_mode_fill_fb_struct()

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Ville,

Thank you for the patch.

On Thursday 17 Nov 2016 18:14:17 ville.syrjala@linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Populating fb->dev before drm_framebuffer_init() allows us to use
> fb->dev already while validating the framebuffer. Let's have
> drm_helper_mode_fill_fb_struct() do that for us.
> 
> Also make drm_framebuffer_init() warn us if a different device
> pointer is passed to it than was passed to
> drm_helper_mode_fill_fb_struct().
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/gpu/drm/drm_framebuffer.c    | 3 ++-
>  drivers/gpu/drm/drm_modeset_helper.c | 1 +
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_framebuffer.c
> b/drivers/gpu/drm/drm_framebuffer.c index cbf0c893f426..527220c08f9b 100644
> --- a/drivers/gpu/drm/drm_framebuffer.c
> +++ b/drivers/gpu/drm/drm_framebuffer.c
> @@ -632,7 +632,8 @@ int drm_framebuffer_init(struct drm_device *dev, struct
> drm_framebuffer *fb, int ret;
> 
>  	INIT_LIST_HEAD(&fb->filp_head);
> -	fb->dev = dev;
> +	if (WARN_ON_ONCE(fb->dev != dev))
> +		fb->dev = dev;
>  	fb->funcs = funcs;
> 
>  	ret = drm_mode_object_get_reg(dev, &fb->base, DRM_MODE_OBJECT_FB,
> diff --git a/drivers/gpu/drm/drm_modeset_helper.c
> b/drivers/gpu/drm/drm_modeset_helper.c index 285ffcba0fe8..57a319e3f780
> 100644
> --- a/drivers/gpu/drm/drm_modeset_helper.c
> +++ b/drivers/gpu/drm/drm_modeset_helper.c
> @@ -90,6 +90,7 @@ void drm_helper_mode_fill_fb_struct(struct drm_device
> *dev, fb->bits_per_pixel = info->cpp[0] * 8;
>  	}
> 
> +	fb->dev = dev;
>  	fb->width = mode_cmd->width;
>  	fb->height = mode_cmd->height;
>  	for (i = 0; i < 4; i++) {

-- 
Regards,

Laurent Pinchart

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