[Bug 217651] BCM20702B0 Bluetooth device in MacBook no longer working

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https://bugzilla.kernel.org/show_bug.cgi?id=217651

--- Comment #17 from Tomasz Moń (desowin@gmail.com) ---
I think I understand the issue now, but the lsusb output would confirm it.
Before my patch, the driver would allow both interface 0 and 2, after it only
interface 2 is allowed for devices with BTUSB_IFNUM_2 flag set.

I see two potential solutions:
  1. Remove the check completely
  2. Change the if condition to allow both interface 0 and 2.

For the second solution, please try following patch:

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 5ec4ad0a5c86..46844194f54e 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -4104,7 +4104,8 @@ static int btusb_probe(struct usb_interface *intf,
        BT_DBG("intf %p id %p", intf, id);

        if ((id->driver_info & BTUSB_IFNUM_2) &&
-           (intf->cur_altsetting->desc.bInterfaceNumber != 2))
+           ((intf->cur_altsetting->desc.bInterfaceNumber != 0) ||
+            (intf->cur_altsetting->desc.bInterfaceNumber != 2))
                return -ENODEV;

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

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