I am attempting to set up my Raspberry Pi as a bridge (but I think this is not a question specific to the hardware) - using Debian wheezy.

I have a hostapd.conf: (some details changed for security)...

interface=wlan0
bridge=br0
driver=nl80211
auth_algs=1
macaddr_acl=0
ignore_broadcast_ssid=0
logger_syslog=-1
logger_syslog_level=0
hw_mode=g
ssid=MY_SSID
channel=11
wep_default_key=0
wep_key0=MY_KEY
wpa=0

(yes, I know WEP is no good)

And this in /etc/network/interfaces

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp
auto br0
iface br0 inet dhcp
bridge-ports eth0 wlan0

Everything seems to come up ok, but I cannot associate with the bridged wireless connection - even though the flashing lights on the USB stick suggest packets are being exchanged.

I have read somewhere that not all cards/devices will run in hostap mode - they won't pass packets in one direction: is that right? (The info was a bit old)- this my card:

[    3.663245] usb 1-1.3.1: new high-speed USB device number 5 using dwc_otg
[    3.794187] usb 1-1.3.1: New USB device found, idVendor=0cf3, idProduct=9271
[    3.804321] usb 1-1.3.1: New USB device strings: Mfr=16, Product=32, SerialNumber=48
[    3.816994] usb 1-1.3.1: Product: USB2.0 WLAN
[    3.823790] usb 1-1.3.1: Manufacturer: ATHEROS
[    3.830645] usb 1-1.3.1: SerialNumber: 12345

So, what have I got wrong here?