This is a note to let you know that I've just added the patch titled
drm/repaper: Reduce temporary buffer size in repaper_fb_dirty()
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-repaper-reduce-temporary-buffer-size-in-repaper_.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit aed8f21bd799f726691ee6db590290b6e3e7e0ba
Author: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Date: Thu Mar 17 09:18:30 2022 +0100
drm/repaper: Reduce temporary buffer size in repaper_fb_dirty()
[ Upstream commit fedf429e071f6dbbe7a69dfc342492e037692018 ]
As the temporary buffer is no longer used to store 8-bit grayscale data,
its size can be reduced to the size needed to store the monochrome
bitmap data.
Fixes: 24c6bedefbe71de9 ("drm/repaper: Use format helper for xrgb8888 to monochrome conversion")
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220317081830.1211400-6-geert@xxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/tiny/repaper.c b/drivers/gpu/drm/tiny/repaper.c
index c2677d081a7b6..13ae148f59b9b 100644
--- a/drivers/gpu/drm/tiny/repaper.c
+++ b/drivers/gpu/drm/tiny/repaper.c
@@ -533,7 +533,7 @@ static int repaper_fb_dirty(struct drm_framebuffer *fb)
DRM_DEBUG("Flushing [FB:%d] st=%ums\n", fb->base.id,
epd->factored_stage_time);
- buf = kmalloc_array(fb->width, fb->height, GFP_KERNEL);
+ buf = kmalloc(fb->width * fb->height / 8, GFP_KERNEL);
if (!buf) {
ret = -ENOMEM;
goto out_exit;
