[PATCH] Bluetooth: Check scan state before disabling during suspend

[Manish Mandlik]

Check current scan state by checking HCI_LE_SCAN flag and send scan
disable command only if scan is already enabled.

Signed-off-by: Manish Mandlik <mmandlik@xxxxxxxxxx>
---

 net/bluetooth/hci_request.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 1fc55685da62d..1acf5b8e0910c 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -998,8 +998,9 @@ static void hci_req_set_event_filter(struct hci_request *req)
 
 static void hci_req_config_le_suspend_scan(struct hci_request *req)
 {
-	/* Can't change params without disabling first */
-	hci_req_add_le_scan_disable(req);
+	/* Before changing params disable scan if enabled */
+	if (hci_dev_test_flag(req->hdev, HCI_LE_SCAN))
+		hci_req_add_le_scan_disable(req);
 
 	/* Configure params and enable scanning */
 	hci_req_add_le_passive_scan(req);
@@ -1065,8 +1066,9 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
 		page_scan = SCAN_DISABLED;
 		hci_req_add(&req, HCI_OP_WRITE_SCAN_ENABLE, 1, &page_scan);
 
-		/* Disable LE passive scan */
-		hci_req_add_le_scan_disable(&req);
+		/* Disable LE passive scan if enabled */
+		if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+			hci_req_add_le_scan_disable(&req);
 
 		/* Mark task needing completion */
 		set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
-- 
2.27.0.rc2.251.g90737beb825-goog