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drm/sysfb: Do not page-align visible size of the framebuffer

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Only return the actually visible size of the system framebuffer in
drm_sysfb_get_visible_size_si(). Drivers use this size value for
reserving access to framebuffer memory. Increasing the value can
make later attempts to do so fail.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 32ae90c66f ("drm/sysfb: Add efidrm for EFI displays")
Fixes: a84eb6abe2 ("drm/sysfb: Add vesadrm for VESA displays")
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v6.16+
Link: https://patch.msgid.link/20260618084327.46567-2-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2026-06-18 10:41:57 +02:00
parent faaa1e1155
commit 134844856c
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/sysfb/drm_sysfb_screen_info.c
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@ -67,7 +67,7 @@ EXPORT_SYMBOL(drm_sysfb_get_stride_si);
u64 drm_sysfb_get_visible_size_si(struct drm_device *dev, const struct screen_info *si,
unsigned int height, unsigned int stride, u64 size)
{
u64 vsize = PAGE_ALIGN(height * stride);
u64 vsize = height * stride;
return drm_sysfb_get_validated_size0(dev, "visible size", vsize, size);
}