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Bluetooth: btrtl: HCI reset on close for Realtek BT chip

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Realtek RTL8822BE BT chip on ASUS X420FA cannot be turned on correctly
after on-off several times. Bluetooth daemon sets BT mode failed when
this issue happens. Scanning must be active while turning off for this
bug to be hit.

bluetoothd[1576]: Failed to set mode: Failed (0x03)

If BT is turned off, then turned on again, it works correctly again.

According to the vendor driver, the HCI_QUIRK_RESET_ON_CLOSE flag is set
during probing. So, this patch makes Realtek's BT reset on close to fix
this issue.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=203429
Signed-off-by: Jian-Hong Pan <jian-hong@endlessm.com>
Reviewed-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Jian-Hong Pan
2019-06-25 16:30:51 +08:00
committed by Marcel Holtmann
parent 6322f377bc
commit 7af3f558ac
3 changed files with 27 additions and 0 deletions
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1
drivers/bluetooth/btusb.c
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@@ -3184,6 +3184,7 @@ static int btusb_probe(struct usb_interface *intf,
#ifdef CONFIG_BT_HCIBTUSB_RTL
if (id->driver_info & BTUSB_REALTEK) {
hdev->setup = btrtl_setup_realtek;
hdev->shutdown = btrtl_shutdown_realtek;
/* Realtek devices lose their updated firmware over suspend,
* but the USB hub doesn't notice any status change.