Use proper fix for Bluetooth LE advertisement stall (#2598) (#2714)

Instead of reverting the new hci_sync based BLE scan disable logic
use the fix proposed by Luiz:
https://lore.kernel.org/linux-bluetooth/CABBYNZ+5RMqNVMyYKi+gOVaV+K6k8Z-C37KnfGa=qRUORc3dWg@mail.gmail.com/

This fix avoids BLE stalls just like the revert.

buildroot-external/patches/linux/0001-Bluetooth-hci_sync-Fix-handling-of-HCI_QUIRK_STRICT_.patch

@@ -0,0 +1,60 @@
+From b93f2a3748f32cde4a09cade7948bb406a2a4091 Mon Sep 17 00:00:00 2001
+Message-ID: <b93f2a3748f32cde4a09cade7948bb406a2a4091.1693428313.git.stefan@agner.ch>
+From: Luiz Augusto von Dentz <[email protected]>
+Date: Tue, 29 Aug 2023 13:59:36 -0700
+Subject: [PATCH] Bluetooth: hci_sync: Fix handling of
+ HCI_QUIRK_STRICT_DUPLICATE_FILTER
+
+When HCI_QUIRK_STRICT_DUPLICATE_FILTER is set LE scanning requires
+periodic restarts of the scanning procedure as the controller would
+consider device previously found as duplicated despite of RSSI changes,
+but in order to set the scan timeout properly set le_scan_restart needs
+to be synchronous so it shall not use hci_cmd_sync_queue which defers
+the command processing to cmd_sync_work.
+
+link: https://lore.kernel.org/linux-bluetooth/[email protected]/#t
+Fixes: 27d54b778ad1 ("Bluetooth: Rework le_scan_restart for hci_sync")
+Signed-off-by: Luiz Augusto von Dentz <[email protected]>
+---
+ net/bluetooth/hci_sync.c | 13 ++++---------
+ 1 file changed, 4 insertions(+), 9 deletions(-)
+
+diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
+index 2ae038dfc39f..f8bb2504f99a 100644
+--- a/net/bluetooth/hci_sync.c
++++ b/net/bluetooth/hci_sync.c
+@@ -412,11 +412,6 @@ static int hci_le_scan_restart_sync(struct hci_dev *hdev)
+ 					   LE_SCAN_FILTER_DUP_ENABLE);
+ }
+
+-static int le_scan_restart_sync(struct hci_dev *hdev, void *data)
+-{
+-	return hci_le_scan_restart_sync(hdev);
+-}
+-
+ static void le_scan_restart(struct work_struct *work)
+ {
+ 	struct hci_dev *hdev = container_of(work, struct hci_dev,
+@@ -426,15 +421,15 @@ static void le_scan_restart(struct work_struct *work)
+
+ 	bt_dev_dbg(hdev, "");
+
+-	hci_dev_lock(hdev);
+-
+-	status = hci_cmd_sync_queue(hdev, le_scan_restart_sync, NULL, NULL);
++	status = hci_le_scan_restart_sync(hdev);
+ 	if (status) {
+ 		bt_dev_err(hdev, "failed to restart LE scan: status %d",
+ 			   status);
+-		goto unlock;
++		return;
+ 	}
+
++	hci_dev_lock(hdev);
++
+ 	if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
+ 	    !hdev->discovery.scan_start)
+ 		goto unlock;
+-- 
+2.42.0
+