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habanalabs: print if device is used on FD close 

Notify to the user that although he closed the FD, the device is
still in use because there are live CS and/or memory mappings (mmaps).

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Oded Gabbay 2021-02-18 10:24:02 +02:00
parent d3ee681afd
commit 278b5f7acb
2 changed files with 6 additions and 4 deletions
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8
drivers/misc/habanalabs/common/device.c
View File

@ -80,9 +80,9 @@ void hl_hpriv_get(struct hl_fpriv *hpriv)
kref_get(&hpriv->refcount);
}
void hl_hpriv_put(struct hl_fpriv *hpriv)
int hl_hpriv_put(struct hl_fpriv *hpriv)
{
kref_put(&hpriv->refcount, hpriv_release);
return kref_put(&hpriv->refcount, hpriv_release);
}
/*
@ -109,7 +109,9 @@ static int hl_device_release(struct inode *inode, struct file *filp)
hl_cb_mgr_fini(hdev, &hpriv->cb_mgr);
hl_ctx_mgr_fini(hdev, &hpriv->ctx_mgr);
hl_hpriv_put(hpriv);
if (!hl_hpriv_put(hpriv))
dev_warn(hdev->dev,
"Device is still in use because there are live CS and/or memory mappings\n");
return 0;
}

2
drivers/misc/habanalabs/common/habanalabs.h
View File

@ -2182,7 +2182,7 @@ int hl_device_resume(struct hl_device *hdev);
int hl_device_reset(struct hl_device *hdev, bool hard_reset,
bool from_hard_reset_thread);
void hl_hpriv_get(struct hl_fpriv *hpriv);
void hl_hpriv_put(struct hl_fpriv *hpriv);
int hl_hpriv_put(struct hl_fpriv *hpriv);
int hl_device_set_frequency(struct hl_device *hdev, enum hl_pll_frequency freq);
uint32_t hl_device_utilization(struct hl_device *hdev, uint32_t period_ms);