From 3a5ef20c979c0f33b6fb2582d04957397a6bf51f Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Sun, 6 Jul 2014 14:53:54 +0200 Subject: Bluetooth: Handle Intel USB bootloader with buggy interrupt The interrupt interface for the Intel USB bootloader devices is only enabled after receiving SetInterface(0, AltSetting=0). When this USB command is not send, then no HCI events will be received. Signed-off-by: Marcel Holtmann Signed-off-by: Johan Hedberg --- drivers/bluetooth/btusb.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/bluetooth') diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 14314a12bab..fe24f600ed6 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1807,6 +1807,18 @@ static int btusb_probe(struct usb_interface *intf, data->isoc = NULL; } + if (id->driver_info & BTUSB_INTEL_BOOT) { + /* A bug in the bootloader causes that interrupt interface is + * only enabled after receiving SetInterface(0, AltSetting=0). + */ + err = usb_set_interface(data->udev, 0, 0); + if (err < 0) { + BT_ERR("failed to set interface 0, alt 0 %d", err); + hci_free_dev(hdev); + return err; + } + } + if (data->isoc) { err = usb_driver_claim_interface(&btusb_driver, data->isoc, data); -- cgit v1.2.3-70-g09d2