If GPU is during a resetting cycle, writing to GPU can cause
unpredictable protection fault. Disallow using kfd debugfs
hang_hws to hang hws if GPU is resetting.
Signed-off-by: Oak Zeng <Oak.Zeng@xxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_device.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index 9e4a05e..c380be9 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -1390,6 +1390,11 @@ int kfd_debugfs_hang_hws(struct kfd_dev *dev)
return -EINVAL;
}
+ if (dev->dqm->is_resetting) {
+ pr_err("HWS is already under resetting, please wait the current reset to finish\n");
+ return -EBUSY;
+ }
+
r = pm_debugfs_hang_hws(&dev->dqm->packets);
if (!r)
r = dqm_debugfs_execute_queues(dev->dqm);
--
2.7.4
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