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drm/amd: Fix a few more NULL pointer dereference in device cleanup

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I found a few more paths that cleanup fails due to a NULL version pointer
on unsupported hardware.

Add NULL checks as applicable.

Fixes: 39fc2bc4da ("drm/amdgpu: Protect GPU register accesses in powergated state in some paths")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit f5a05f8414fc10f307eb965f303580c7778f8dd2)
Cc: stable@vger.kernel.org
This commit is contained in:
Mario Limonciello
2026-03-05 09:06:11 -06:00
committed by Alex Deucher
parent a6571045cf
commit 72ecb1dae7
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -3497,6 +3497,8 @@ static int amdgpu_device_ip_fini_early(struct amdgpu_device *adev)
int i, r;
for (i = 0; i < adev->num_ip_blocks; i++) {
if (!adev->ip_blocks[i].version)
continue;
if (!adev->ip_blocks[i].version->funcs->early_fini)
continue;
@@ -3574,6 +3576,8 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
if (!adev->ip_blocks[i].status.sw)
continue;
if (!adev->ip_blocks[i].version)
continue;
if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) {
amdgpu_ucode_free_bo(adev);
amdgpu_free_static_csa(&adev->virt.csa_obj);
@@ -3600,6 +3604,8 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
if (!adev->ip_blocks[i].status.late_initialized)
continue;
if (!adev->ip_blocks[i].version)
continue;
if (adev->ip_blocks[i].version->funcs->late_fini)
adev->ip_blocks[i].version->funcs->late_fini(&adev->ip_blocks[i]);
adev->ip_blocks[i].status.late_initialized = false;