Bluetooth: Cancel sync command before suspend and power off

Some of the sync commands might take a long time to complete, e.g. LE Create Connection when the peer device isn't responding might take 20 seconds before it times out. If suspend command is issued during this time, it will need to wait for completion since both commands are using the same sync lock. This patch cancel any running sync commands before attempting to suspend or adapter power off. Signed-off-by: Archie Pusaka <[email protected]> Reviewed-by: Ying Hsu <[email protected]> Signed-off-by: Luiz Augusto von Dentz <[email protected]>
kawasaki · Apr 24, 2023 · f419863 · f419863
1 parent 7948fe1
commit f419863
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diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
@@ -2803,6 +2803,9 @@ int hci_suspend_dev(struct hci_dev *hdev)
 	if (mgmt_powering_down(hdev))
 		return 0;
 
+	/* Cancel potentially blocking sync operation before suspend */
+	__hci_cmd_sync_cancel(hdev, -EHOSTDOWN);
+
 	hci_req_sync_lock(hdev);
 	ret = hci_suspend_sync(hdev);
 	hci_req_sync_unlock(hdev);

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
@@ -1399,6 +1399,10 @@ static int set_powered(struct sock *sk, struct hci_dev *hdev, void *data,
 		goto failed;
 	}
 
+	/* Cancel potentially blocking sync operation before power off */
+	if (cp->val == 0x00)
+		__hci_cmd_sync_cancel(hdev, -EHOSTDOWN);
+
 	err = hci_cmd_sync_queue(hdev, set_powered_sync, cmd,
 				 mgmt_set_powered_complete);