[PATCH 11/11] Bluetooth: hci_core: Don't treat HCI_DRV_PKT/HCI_DIAG_PKT as unknown type

[Zijun Hu]

Both HCI_DRV_PKT and HCI_DIAG_PKT reach hci_rx_work(), and leverage
the default switch case to free them silently. Relying on the default
case is prone to mislead readers into thinking either that:

1) they never arrive at hci_rx_work(), and the function does not
   handle them at all; or
2) they are unknown packet types, which normally fall into the
   default switch case.

Fix by giving both their own switch cases that free them explicitly.

Signed-off-by: Zijun Hu <zijun.hu@xxxxxxxxxxxxxxxx>
---
Previous version:
https://lore.kernel.org/all/20260719-fix_hci_rx_work-v1-1-2d7fdeed3640@xxxxxxxxxxxxxxxx

Changes since previous version:
- Improve commit title and message.
---
 net/bluetooth/hci_core.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9d5adf882509..85f1b44fed9b 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -4051,16 +4051,24 @@ static void hci_rx_work(struct work_struct *work)
 			hci_scodata_packet(hdev, skb);
 			break;
 
 		case HCI_ISODATA_PKT:
 			BT_DBG("%s ISO data packet", hdev->name);
 			hci_isodata_packet(hdev, skb);
 			break;
 
+		case HCI_DRV_PKT:
+			kfree_skb(skb);
+			break;
+
+		case HCI_DIAG_PKT:
+			kfree_skb(skb);
+			break;
+
 		default:
 			kfree_skb(skb);
 			break;
 		}
 	}
 }
 
 static int hci_send_cmd_sync(struct hci_dev *hdev, struct sk_buff *skb)

-- 
2.34.1