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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 <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2014-07-06 14:53:54 +02:00 committed by Johan Hedberg
parent 223683a54b
commit 3a5ef20c97
1 changed files with 12 additions and 0 deletions
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12
drivers/bluetooth/btusb.c
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@ -1807,6 +1807,18 @@ static int btusb_probe(struct usb_interface *intf,
data->isoc = NULL; 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) { if (data->isoc) {
err = usb_driver_claim_interface(&btusb_driver, err = usb_driver_claim_interface(&btusb_driver,
data->isoc, data); data->isoc, data);