From: Jesse Zhang <jesse.zhang@amd.com>
Date: Wed, 8 May 2024 08:20:49 +0000 (+0800)
Subject: drm/amdgpu: fix the waring dereferencing hive
X-Git-Tag: microblaze-v6.13~537^2~32^2~239
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=1940708ccf5aff76de4e0b399f99267c93a89193;p=linux-2.6-microblaze.git

drm/amdgpu: fix the waring dereferencing hive

Check the amdgpu_hive_info *hive that maybe is NULL.

Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Tim Huang <Tim.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 37820dd03cab..5a648a657dc6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -1362,6 +1362,9 @@ static void psp_xgmi_reflect_topology_info(struct psp_context *psp,
 	uint8_t dst_num_links = node_info.num_links;
 
 	hive = amdgpu_get_xgmi_hive(psp->adev);
+	if (WARN_ON(!hive))
+		return;
+
 	list_for_each_entry(mirror_adev, &hive->device_list, gmc.xgmi.head) {
 		struct psp_xgmi_topology_info *mirror_top_info;
 		int j;