[06/18] drm/fb-helper: Do not allocate unused apertures structure

Commit Message

Thomas Zimmermann Dec. 19, 2022, 4:05 p.m. UTC

The apertures field in struct fb_info is not used by DRM drivers. Do
not allocate it.

Signed-off-by: Thomas Zimmermann <[e-mail]>
---
 drivers/gpu/drm/drm_fb_helper.c | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

Comments

Javier Martinez Canillas Dec. 20, 2022, 9:22 a.m. UTC | #1

On 12/19/22 17:05, Thomas Zimmermann wrote:
> The apertures field in struct fb_info is not used by DRM drivers. Do
> not allocate it.
> 
> Signed-off-by: Thomas Zimmermann <[e-mail]>
> ---

Reviewed-by: Javier Martinez Canillas <[e-mail]>

Patch

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index b3a731b9170a..e8a7e8be91d9 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -473,8 +473,8 @@  EXPORT_SYMBOL(drm_fb_helper_init);
  * drm_fb_helper_alloc_info - allocate fb_info and some of its members
  * @fb_helper: driver-allocated fbdev helper
  *
- * A helper to alloc fb_info and the members cmap and apertures. Called
- * by the driver within the fb_probe fb_helper callback function. Drivers do not
+ * A helper to alloc fb_info and the member cmap. Called by the driver
+ * within the fb_probe fb_helper callback function. Drivers do not
  * need to release the allocated fb_info structure themselves, this is
  * automatically done when calling drm_fb_helper_fini().
  *
@@ -496,27 +496,11 @@  struct fb_info *drm_fb_helper_alloc_info(struct drm_fb_helper *fb_helper)
 	if (ret)
 		goto err_release;
 
-	/*
-	 * TODO: We really should be smarter here and alloc an aperture
-	 * for each IORESOURCE_MEM resource helper->dev->dev has and also
-	 * init the ranges of the appertures based on the resources.
-	 * Note some drivers currently count on there being only 1 empty
-	 * aperture and fill this themselves, these will need to be dealt
-	 * with somehow when fixing this.
-	 */
-	info->apertures = alloc_apertures(1);
-	if (!info->apertures) {
-		ret = -ENOMEM;
-		goto err_free_cmap;
-	}
-
 	fb_helper->info = info;
 	info->skip_vt_switch = true;
 
 	return info;
 
-err_free_cmap:
-	fb_dealloc_cmap(&info->cmap);
 err_release:
 	framebuffer_release(info);
 	return ERR_PTR(ret);