Bluetooth: btusb: Reset port on cmd timeout

QCA_ROME sometimes gets into a state where it is unresponsive to
commands. Since it doesn't have support for a reset gpio, reset the usb
port when this occurs instead.

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index e42fdd6..df46b2a 100644 (file)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -573,6 +573,22 @@ static void btusb_rtl_cmd_timeout(struct hci_dev *hdev)
        gpiod_set_value_cansleep(reset_gpio, 0);
 }
 
+static void btusb_qca_cmd_timeout(struct hci_dev *hdev)
+{
+       struct btusb_data *data = hci_get_drvdata(hdev);
+       int err;
+
+       if (++data->cmd_timeout_cnt < 5)
+               return;
+
+       bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");
+       err = usb_autopm_get_interface(data->intf);
+       if (!err)
+               usb_queue_reset_device(data->intf);
+       else
+               bt_dev_err(hdev, "Failed usb_autopm_get_interface with %d", err);
+}
+
 static inline void btusb_free_frags(struct btusb_data *data)
 {
        unsigned long flags;
@@ -3964,6 +3980,7 @@ static int btusb_probe(struct usb_interface *intf,
        if (id->driver_info & BTUSB_QCA_ROME) {
                data->setup_on_usb = btusb_setup_qca;
                hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
+               hdev->cmd_timeout = btusb_qca_cmd_timeout;
                set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
                btusb_check_needs_reset_resume(intf);
        }