[PATCH AUTOSEL 5.19 07/16] drm/amdgpu: use dirty framebuffer helper

[Eric Biggers]

On Wed, Sep 21, 2022 at 11:53:23AM -0400, Sasha Levin wrote:
> From: Hamza Mahfooz <hamza.mahfooz at amd.com>
> 
> [ Upstream commit 66f99628eb24409cb8feb5061f78283c8b65f820 ]
> 
> Currently, we aren't handling DRM_IOCTL_MODE_DIRTYFB. So, use
> drm_atomic_helper_dirtyfb() as the dirty callback in the amdgpu_fb_funcs
> struct.
> 
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz at amd.com>
> Acked-by: Alex Deucher <alexander.deucher at amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> Signed-off-by: Sasha Levin <sashal at kernel.org>

I just spent a long time bisecting a hard-to-reproduce regression to this
commit, only to find that a revert was just queued this week.

Why was this commit backported to stable in the first place?  It didn't have Cc
stable, and it didn't claim to be fixing anything.

- Eric