[PATCH AUTOSEL 6.1 24/61] drm/amdgpu: fix the waring dereferencing hive

Sasha Levin
2024-08-01T00:29:54Z

From: Jesse Zhang <jesse.zhang@amd.com>

[ Upstream commit 1940708ccf5aff76de4e0b399f99267c93a89193 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 8764ff7ed97e0..f8740ad08af41 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -1297,6 +1297,9 @@ 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;
--
2.43.0