From: Lijo Lazar <lijo.lazar@amd.com>
Date: Thu, 6 Nov 2025 13:14:29 +0000 (+0530)
Subject: drm/amdgpu: Check if AID is active before access
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=baf75a087c41eeb03c471099dc5d77e3b068c33b;p=thirdparty%2Fkernel%2Flinux.git

drm/amdgpu: Check if AID is active before access

Access XGMI registers only if AID is active.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index 1ede308a7c677..2f553af1d2a3e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -333,6 +333,10 @@ static u32 xgmi_v6_4_get_link_status(struct amdgpu_device *adev, int global_link
 	}
 
 	i = global_link_num / n;
+
+	if (!(adev->aid_mask & BIT(i)))
+		return U32_MAX;
+
 	addr += adev->asic_funcs->encode_ext_smn_addressing(i);
 
 	return RREG32_PCIE_EXT(addr);