On Mon, Sep 11, 2023 at 08:44:28PM +0000, Deucher, Alexander wrote:
[Public]
-----Original Message----- From: Greg Kroah-Hartman gregkh@linuxfoundation.org Sent: Thursday, August 24, 2023 10:49 AM To: stable@vger.kernel.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org; patches@lists.linux.dev; Koenig, Christian Christian.Koenig@amd.com; Yu, Lang Lang.Yu@amd.com; Deucher, Alexander Alexander.Deucher@amd.com; Sasha Levin sashal@kernel.org Subject: [PATCH 5.15 015/139] drm/amdgpu: install stub fence into potential unused fence pointers
From: Lang Yu Lang.Yu@amd.com
[ Upstream commit 187916e6ed9d0c3b3abc27429f7a5f8c936bd1f0 ]
When using cpu to update page tables, vm update fences are unused. Install stub fence into these fence pointers instead of NULL to avoid NULL dereference when calling dma_fence_wait() on them.
Suggested-by: Christian König christian.koenig@amd.com Signed-off-by: Lang Yu Lang.Yu@amd.com Reviewed-by: Christian König christian.koenig@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org
Please revert this from 5.15. This was autoselected for 5.15, but is not applicable to this branch. This is causing log spam on 5.15. It was included in 5.15.128 as commit 4921792e04f2125b5eadef9dbe9417a8354c7eff. See https://gitlab.freedesktop.org/drm/amd/-/issues/2820
Now reverted, thanks.
greg k-h