Thanks. It worked after I disabled the use of a separate group interface.<div><br><div class="gmail_quote">On Mon, Nov 19, 2012 at 4:03 AM, Jouni Malinen <span dir="ltr"><<a href="mailto:j@w1.fi" target="_blank">j@w1.fi</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On Sun, Nov 18, 2012 at 08:08:20PM -0600, Chao Xu wrote:<br>
> I'm running the latest wpa_supplicant. My wireless adapter uses ar9170<br>
> chipset. I installed the carl9170 driver. When I tried the p2p_gorup_add,<br>
> the wpa_cli returned this:<br>
> p2p_group_add<br>
> FAIL<br>
> <5>P2P: Failed to initialize group interface<br>
<br>
</div>It looks like the driver rejected this configuration for some reason. I<br>
have not tested P2P with carl9170, so I don't know what to expect from<br>
that.<br>
<div class="im"><br>
> nl80211: Create interface iftype 9 (P2P_GO)<br>
> nl80211: New interface p2p-wlan0-0 created: ifindex=10<br>
> nl80211: Allocate new address for P2P group interface<br>
> nl80211: Assigned new P2P Interface Address 02:1f:33:f8:0f:23<br>
> P2P: Created pending virtual interface p2p-wlan0-0 addr 02:1f:33:f8:0f:23<br>
<br>
</div><div class="im">> Could not set interface p2p-wlan0-0 flags (UP): Device or resource busy<br>
> nl80211: Could not set interface 'p2p-wlan0-0' UP<br>
<br>
</div><div class="im">> What's the possible reason that prevents the setup of the interface<br>
> p2p-wlan0-0? I turned off the network-manager when I run wpa_supplicant to<br>
> prevent any interference. Thank you!<br>
<br>
</div>Do you need support for concurrent operations (station + P2P interface<br>
at the same time)? If not, you could test what happens if you disable<br>
use of a separate group interface by adding this to wpa_supplicant<br>
configuration file:<br>
p2p_no_group_iface=1<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Jouni Malinen PGP id EFC895FA<br>
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</font></span></blockquote></div><br><br clear="all"><div><br></div>-- <br><div>Regards,</div>
<div>Chao Xu</div><br>
</div>