[PATCH v3 4/7] Bluetooth: hci_core: Introduce __hci_reset_dev() with a hardware error code

[Zijun Hu]

hci_reset_dev() injects a constant hardware error code 0x00 to restart
the device. But a transport driver may need a different error code.

Fix by introducing __hci_reset_dev(hdev, hw_err_code), which will be
used by a follow-up patch.

Signed-off-by: Zijun Hu <zijun.hu@xxxxxxxxxxxxxxxx>
---
 include/net/bluetooth/hci_core.h | 8 +++++++-
 net/bluetooth/hci_core.c         | 6 +++---
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 01b938c4b24a..b7e71733f360 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1780,17 +1780,23 @@ static inline struct hci_dev *hci_alloc_dev(void)
 void hci_free_dev(struct hci_dev *hdev);
 int hci_register_dev(struct hci_dev *hdev);
 void hci_unregister_dev(struct hci_dev *hdev);
 void hci_release_dev(struct hci_dev *hdev);
 int hci_register_suspend_notifier(struct hci_dev *hdev);
 int hci_unregister_suspend_notifier(struct hci_dev *hdev);
 int hci_suspend_dev(struct hci_dev *hdev);
 int hci_resume_dev(struct hci_dev *hdev);
-int hci_reset_dev(struct hci_dev *hdev);
+int __hci_reset_dev(struct hci_dev *hdev, u8 hw_err_code);
+
+static inline int hci_reset_dev(struct hci_dev *hdev)
+{
+	return __hci_reset_dev(hdev, 0);
+}
+
 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
 __printf(2, 3) void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...);
 __printf(2, 3) void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...);
 
 static inline void hci_set_msft_opcode(struct hci_dev *hdev, __u16 opcode)
 {
 #if IS_ENABLED(CONFIG_BT_MSFTEXT)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9d5adf882509..509c820a693d 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2847,34 +2847,34 @@ int hci_resume_dev(struct hci_dev *hdev)
 		      hdev->wake_addr_type);
 
 	hci_sock_dev_event(hdev, HCI_DEV_RESUME);
 	return ret;
 }
 EXPORT_SYMBOL(hci_resume_dev);
 
 /* Reset HCI device */
-int hci_reset_dev(struct hci_dev *hdev)
+int __hci_reset_dev(struct hci_dev *hdev, u8 hw_err_code)
 {
-	static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
+	const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, hw_err_code };
 	struct sk_buff *skb;
 
 	skb = bt_skb_alloc(3, GFP_ATOMIC);
 	if (!skb)
 		return -ENOMEM;
 
 	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
 	skb_put_data(skb, hw_err, 3);
 
 	bt_dev_err(hdev, "Injecting HCI hardware error event");
 
 	/* Send Hardware Error to upper stack */
 	return hci_recv_frame(hdev, skb);
 }
-EXPORT_SYMBOL(hci_reset_dev);
+EXPORT_SYMBOL(__hci_reset_dev);
 
 static u8 hci_dev_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	if (hdev->classify_pkt_type)
 		return hdev->classify_pkt_type(hdev, skb);
 
 	return hci_skb_pkt_type(skb);
 }

-- 
2.34.1