From: Lijo Lazar Date: Thu, 17 Oct 2024 09:02:12 +0000 (+0530) Subject: drm/amdgpu: Fix the logic for NPS request failure X-Git-Tag: v6.13-rc1~122^2~15^2~7 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d37bc6a4ed252083c8f883597389e7f33ad8b670;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu: Fix the logic for NPS request failure On a hive, NPS request is placed by the first one for all devices in the hive. If the request fails, mark the mode as UNKNOWN so that subsequent devices on unload don't request it. Also, fix the mutex double lock issue in error condition, should have been mutex_unlock. Fixes: ee52489d1210 ("drm/amdgpu: Place NPS mode request on unload") Signed-off-by: Lijo Lazar Reviewed-by: Rajneesh Bhardwaj Acked-by: Alex Deucher Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c index fcdbcff57632d..3ef5066ca5294 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c @@ -1586,26 +1586,30 @@ int amdgpu_xgmi_request_nps_change(struct amdgpu_device *adev, * devices don't request anymore. */ mutex_lock(&hive->hive_lock); + if (atomic_read(&hive->requested_nps_mode) == + UNKNOWN_MEMORY_PARTITION_MODE) { + dev_dbg(adev->dev, "Unexpected entry for hive NPS change"); + mutex_unlock(&hive->hive_lock); + return 0; + } list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head) { r = adev->gmc.gmc_funcs->request_mem_partition_mode( tmp_adev, req_nps_mode); if (r) - goto err; + break; + } + if (r) { + /* Request back current mode if one of the requests failed */ + cur_nps_mode = + adev->gmc.gmc_funcs->query_mem_partition_mode(tmp_adev); + list_for_each_entry_continue_reverse( + tmp_adev, &hive->device_list, gmc.xgmi.head) + adev->gmc.gmc_funcs->request_mem_partition_mode( + tmp_adev, cur_nps_mode); } /* Set to UNKNOWN so that other devices don't request anymore */ atomic_set(&hive->requested_nps_mode, UNKNOWN_MEMORY_PARTITION_MODE); - mutex_unlock(&hive->hive_lock); - return 0; -err: - /* Request back current mode if one of the requests failed */ - cur_nps_mode = adev->gmc.gmc_funcs->query_mem_partition_mode(tmp_adev); - list_for_each_entry_continue_reverse(tmp_adev, &hive->device_list, - gmc.xgmi.head) - adev->gmc.gmc_funcs->request_mem_partition_mode(tmp_adev, - cur_nps_mode); - mutex_lock(&hive->hive_lock); - return r; }