Hello Stanley.Yang,
The patch b1338a8e71ac: "drm/amdgpu: Workaround to skip kiq ring test
during ras gpu recovery" from Oct 17, 2023 (linux-next), leads to the
following Smatch static checker warning:
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c:513 amdgpu_get_xgmi_hive()
warn: sleeping in atomic context
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
500 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
501 {
502 struct amdgpu_hive_info *hive = NULL;
503 int ret;
504
505 if (!adev->gmc.xgmi.hive_id)
506 return NULL;
507
508 if (adev->hive) {
509 kobject_get(&adev->hive->kobj);
510 return adev->hive;
511 }
512
--> 513 mutex_lock(&xgmi_mutex);
The patch adds a new caller amdgpu_gfx_disable_kcq() which is holding
spin_lock(&kiq->ring_lock). And we can't take a mutex if we're already
holding a spin_lock. Turn on CONFIG_DEBUG_ATOMIC_SLEEP to see the
warning.
regards,
dan carpenter
