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drm/amdgpu: fix kernel page fault issue by ras recovery on sGPU

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When running ras uncorrectable error injection and triggering GPU
reset on sGPU, below issue is observed. It's caused by the list
uninitialized when accessing.

[   80.047227] BUG: unable to handle page fault for address: ffffffffc0f4f750
[   80.047300] #PF: supervisor write access in kernel mode
[   80.047351] #PF: error_code(0x0003) - permissions violation
[   80.047404] PGD 12c20e067 P4D 12c20e067 PUD 12c210067 PMD 41c4ee067 PTE 404316061
[   80.047477] Oops: 0003 [#1] SMP PTI
[   80.047516] CPU: 7 PID: 377 Comm: kworker/7:2 Tainted: G           OE     5.4.0-rc7-guchchen #1
[   80.047594] Hardware name: System manufacturer System Product Name/TUF Z370-PLUS GAMING II, BIOS 0411 09/21/2018
[   80.047888] Workqueue: events amdgpu_ras_do_recovery [amdgpu]

Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: John Clements <John.Clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Guchun Chen 2020-04-16 23:41:07 +08:00 committed by Alex Deucher
parent 69d0c18dda
commit 12c17b9d62
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
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@ -1453,9 +1453,10 @@ static void amdgpu_ras_do_recovery(struct work_struct *work)
struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, false);
/* Build list of devices to query RAS related errors */
if (hive && adev->gmc.xgmi.num_physical_nodes > 1) {
if (hive && adev->gmc.xgmi.num_physical_nodes > 1)
device_list_handle = &hive->device_list;
} else {
else {
INIT_LIST_HEAD(&device_list);
list_add_tail(&adev->gmc.xgmi.head, &device_list);
device_list_handle = &device_list;
}