mix AP and wireless client

[Dan Williams]

On Thu, 2015-01-22 at 09:34 +0100, Harm Verhagen wrote:
> On Wed, Jan 21, 2015 at 9:21 PM, Dan Williams <dcbw at redhat.com> wrote:
> 
> > On Wed, 2015-01-21 at 19:51 +0100, Harm Verhagen wrote:
> > > On Wed, Jan 21, 2015 at 6:35 PM, Dan Williams <dcbw at redhat.com> wrote:
> >
> > > > I see you said GWF-3M05 which appears to be a ralink device.  Which
> > > > kernel version and which ralink driver are you using?  Are you using
> > > > rt2800usb or are you using a vendor driver?
> > > >
> > > >
> > > kernel: 3.1.10
> > > about driver, i'm not really sure. How can I tell ?
> > > Let me check the kernel config tomorrow.
> >
> > dmesg output will usually tell you, eg 'dmesg | grep 2800'.  Or post
> > your 'lsmod' output and we can figure it out too.
> >
> > Dan
> >
> >
> Right, so yes I'm using rt2800usb, and yes seems a Ralink device.
> 
> $ lsmod -> no modules, all built-in
> 
> $dmesg | grep 2800
> [    4.160068] usbcore: registered new interface driver rt2800usb
> [    9.676979] Registered led device: rt2800usb-phy0::radio
> [    9.677263] Registered led device: rt2800usb-phy0::assoc
> [    9.677539] Registered led device: rt2800usb-phy0::quality
> 
> $ dmesg | grep phy0
> [    9.673829] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
> [    9.676979] Registered led device: rt2800usb-phy0::radio
> [    9.677263] Registered led device: rt2800usb-phy0::assoc
> [    9.677539] Registered led device: rt2800usb-phy0::quality
> 
> $ dmesg| grep 3-1.4
> [    9.085779] usb 3-1.4: new high speed USB device number 4 using
> tegra-ehci
> [    9.243734] usb 3-1.4: New USB device found, idVendor=148f,
> idProduct=3070
> [    9.258476] usb 3-1.4: New USB device strings: Mfr=1, Product=2,
> SerialNumber=3
> [    9.280257] usb 3-1.4: Product: 802.11 n WLAN
> [    9.291809] usb 3-1.4: Manufacturer: Ralink
> [    9.303156] usb 3-1.4: SerialNumber: 1.0
> [    9.406341] usb 3-1.4: reset high speed USB device number 4 using
> tegra-ehci

rt2800 from the 3.1 kernel does not support mixed combinations of STA
and AP interfaces, unfortunately.  See
drivers/net/wireless/rt2x00/rt2x00mac.c::rt2x00mac_add_interface():

        case NL80211_IFTYPE_AP:
                /*
                 * We don't support mixed combinations of
                 * sta and ap interfaces.
                 */
                if (rt2x00dev->intf_sta_count)
                        return -ENOBUFS;
...
        case NL80211_IFTYPE_STATION:
                /*
                 * We don't support mixed combinations of
                 * sta and ap interfaces.
                 */
                if (rt2x00dev->intf_ap_count)
                        return -ENOBUFS;

So that's exactly where you're seeing the "no buffer space available"
errors.  It appears you need at least kernel v3.7 or later to support
interface combinations on rt2800 devices.

Dan