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Date:   Mon, 13 Jun 2022 14:43:27 -0700
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Message-Id: <20220613144322.kernel.v1.1.Ia621daca5b03278ee09314c59659b64c901408cf@changeid>
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References: <20220613214327.15866-1-jiangzp@google.com>
Subject: [kernel PATCH v1 1/1] Bluetooth: mgmt: Fix refresh cached connection info
From:   Zhengping Jiang <jiangzp@google.com>
To:     linux-bluetooth@vger.kernel.org, marcel@holtmann.org
Cc:     chromeos-bluetooth-upstreaming@chromium.org,
        Zhengping Jiang <jiangzp@google.com>,
        Brian Gix <brian.gix@intel.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Johan Hedberg <johan.hedberg@gmail.com>,
        Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
        Paolo Abeni <pabeni@redhat.com>, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Set the connection data before calling get_conn_info_sync, so it can be
verified the connection is still connected, before refreshing cached
values.

Fixes: 47db6b42991e6 ("Bluetooth: hci_sync: Convert MGMT_OP_GET_CONN_INFO")
Signed-off-by: Zhengping Jiang <jiangzp@google.com>
---

Changes in v1:
- Set connection data before calling hci_cmd_sync_queue

 net/bluetooth/mgmt.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 74937a8346488..cfbea6fa04335 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -6828,11 +6828,14 @@ static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data,
 
 		cmd = mgmt_pending_new(sk, MGMT_OP_GET_CONN_INFO, hdev, data,
 				       len);
-		if (!cmd)
+		if (!cmd) {
 			err = -ENOMEM;
-		else
+		} else {
+			hci_conn_hold(conn);
+			cmd->user_data = hci_conn_get(conn);
 			err = hci_cmd_sync_queue(hdev, get_conn_info_sync,
 						 cmd, get_conn_info_complete);
+		}
 
 		if (err < 0) {
 			mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_CONN_INFO,
@@ -6844,9 +6847,6 @@ static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data,
 			goto unlock;
 		}
 
-		hci_conn_hold(conn);
-		cmd->user_data = hci_conn_get(conn);
-
 		conn->conn_info_timestamp = jiffies;
 	} else {
 		/* Cache is valid, just reply with values cached in hci_conn */
-- 
2.36.1.476.g0c4daa206d-goog