Commit c13380a5 authored Feb 07, 2023 by Tomasz Moń Committed by Luiz Augusto von Dentz Apr 23, 2023

Bluetooth: btusb: Do not require hardcoded interface numbers



Remove hardcoded interface number check because Bluetooth specification
since version 4.0 only recommends and no longer requires specific
interface numbers.

While earlier Bluetooth versions, i.e. 2.1 + EDR and 3.0 + HS, contain
required configuration table in Volume 4 - Host Controller Interface
Part B - USB Transport Layer, Bluetooth Core Specification Addendum 2
changes the table from required to recommended configuration.

Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

parent a80d2c54

drivers/bluetooth/btusb.c

+3 −7

Original line number	Diff line number	Diff line
		@@ -3831,13 +3831,9 @@ static int btusb_probe(struct usb_interface *intf,

		BT_DBG("intf %p id %p", intf, id);

		/* interface numbers are hardcoded in the spec */
		if (intf->cur_altsetting->desc.bInterfaceNumber != 0) {
		if (!(id->driver_info & BTUSB_IFNUM_2))
		if ((id->driver_info & BTUSB_IFNUM_2) &&
		(intf->cur_altsetting->desc.bInterfaceNumber != 2))
		return -ENODEV;
		if (intf->cur_altsetting->desc.bInterfaceNumber != 2)
		return -ENODEV;
		}

		ifnum_base = intf->cur_altsetting->desc.bInterfaceNumber;