drm/amdgpu: Check if AID is active before access

Lijo Lazar · alexdeucher · commit baf75a087c41 · 2025-11-11T21:54:18.000-05:00
Access XGMI registers only if AID is active.

Signed-off-by: Lijo Lazar &lt;lijo.lazar@amd.com&gt;
Reviewed-by: Asad Kamal &lt;asad.kamal@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
diff --git 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);

Original file line number	Diff line number	Diff line change
`@@ -333,6 +333,10 @@ static u32 xgmi_v6_4_get_link_status(struct amdgpu_device *adev, int global_link`
`333`	`333`	`}`
`334`	`334`
`335`	`335`	`i = global_link_num / n;`
	`336`	`+`
	`337`	`+ if (!(adev->aid_mask & BIT(i)))`
	`338`	`+ return U32_MAX;`
	`339`	`+`
`336`	`340`	`addr += adev->asic_funcs->encode_ext_smn_addressing(i);`
`337`	`341`
`338`	`342`	`return RREG32_PCIE_EXT(addr);`