Re: [PATCH] drm/amdgpu: Remove ATC L2 access for MMHUB 2.1.x

"Lazar, Lijo" <lijo.lazar@xxxxxxx> · Tue, 18 Oct 2022 10:59:53 +0530

On 10/18/2022 10:51 AM, Greg KH wrote:
On Tue, Oct 18, 2022 at 10:17:24AM +0530, Lijo Lazar wrote:
MMHUB 2.1.x versions don't have ATCL2. Remove accesses to ATCL2 registers.

Since they are non-existing registers, read access will cause a
'Completer Abort' and gets reported when AER is enabled with the below patch.
Tagging with the patch so that this is backported along with it.

Fixes: 8795e182b02d ("PCI/portdrv: Don't disable AER reporting in get_port_device_capability()")

Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
---
  drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c | 28 +++++++------------------
  1 file changed, 8 insertions(+), 20 deletions(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
     https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kernel.org%2Fdoc%2Fhtml%2Flatest%2Fprocess%2Fstable-kernel-rules.html&amp;data=05%7C01%7Clijo.lazar%40amd.com%7C63359dc806f44c7ae23208dab0c883b7%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C638016672500798597%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=LUBCEuSA4yhBrdnBwBHHvt0ewxAcw6c7j6BPtt2nPhg%3D&amp;reserved=0
for how to do this properly.

</formletter>

Thanks for the pointer, will resend.

Thanks,
Lijo