From: Guchun Chen guchun.chen@amd.com
[ Upstream commit 12c17b9d62663c14a5343d6742682b3e67280754 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c index b0aa4e1ed4df7..cd18596b47d33 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c @@ -1444,9 +1444,10 @@ 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; }