> I got another idea: if we have a guarantee that the two USB
> interfaces are probed one at a time, then we can move the global
> things into struct rtl_priv. The first probe call will allocate
> the arrays and initialise the mutexes. The second probe call
> will obtain those from the first struct rtl_priv:
>
> int rtl_usb_probe(struct usb_interface *intf, ...) {
> udev = interface_to_usbdev(intf);
> struct ieee80211_hw *first_hw = usb_get_intfdata(udev->actconfig->interface[0]);
> struct rtl_priv *first_rtlpriv = rtl_priv(first_hw);
>
Could it have racing when obtaining mutexes from second probe?
Should we need a lock to ensure the sequence?
When driver is going to down, how can mutexes get free safely?
It seems like we still need another global lock to ensure that.
