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* Is there a bug in 2.6.29-rc8 support of Ad-Hoc mode?
@ 2010-05-26 11:57 Gordon, Charles
  2010-05-26 13:28 ` John W. Linville
  0 siblings, 1 reply; 4+ messages in thread
From: Gordon, Charles @ 2010-05-26 11:57 UTC (permalink / raw)
  To: linux-wireless@vger.kernel.org

I am trying to get a driver I'm developing to work with Ad-Hoc mode on
Linux 2.6.29-rc8.  I am running into a problem.  I have traced it down
to the routine ieee80211_scan_work.  I use the following commands to
start Ad-Hoc mode:

ifconfig wlan0 down
iwconfig wlan0 mode Ad-Hoc essid "AdHocID"
ifconfig wlan0 up

What happens is that the iwconfig command starts a scan for other PCs
using the AdHocID before the second ifconfig command is executed
(while the interface is still down).  When ieee80211_scan_work is
executed, it bails out at this statement:

       /*
        * Avoid re-scheduling when the sdata is going away.
        */
       if (!netif_running(sdata->dev))
               return;

This aborts the scan, but leaves local->sw_scanning set.  This
prevents future scans from running.  When ieee80211_start_scan
executes it bails out at this statement:

       if (local->sw_scanning || local->hw_scanning) {
               if (local->scan_sdata == scan_sdata)
                       return 0;
               return -EBUSY;
       }

Can someone either confirm that this is a known problem with
2.6.28-rc8, or tell me what my driver could be doing to cause this
problem?

Thanks for any help you can provide.

^ permalink raw reply	[flat|nested] 4+ messages in thread
* Is there a bug in 2.6.29-rc8 support of Ad-Hoc mode?
@ 2010-05-26  0:00 Charles Gordon
  0 siblings, 0 replies; 4+ messages in thread
From: Charles Gordon @ 2010-05-26  0:00 UTC (permalink / raw)
  To: linux-wireless

I am trying to get a driver I'm developing to work with Ad-Hoc mode on
Linux 2.6.29-rc8.  I am running into a problem.  I have traced it down
to the routine ieee80211_scan_work.  I use the following commands to
start Ad-Hoc mode:

ifconfig wlan0 down
iwconfig wlan0 mode Ad-Hoc essid "AdHocID"
ifconfig wlan0 up

What happens is that the iwconfig command starts a scan for other PCs
using the AdHocID before the second ifconfig command is executed
(while the interface is still down).  When ieee80211_scan_work is
executed, it bails out at this statement:

	/*
	 * Avoid re-scheduling when the sdata is going away.
	 */
	if (!netif_running(sdata->dev))
		return;

This aborts the scan, but leaves local->sw_scanning set.  This
prevents future scans from running.  When ieee80211_start_scan
executes it bails out at this statement:

	if (local->sw_scanning || local->hw_scanning) {
		if (local->scan_sdata == scan_sdata)
			return 0;
		return -EBUSY;
	}

Can someone either confirm that this is a known problem with
2.6.28-rc8, or tell me what my driver could be doing to cause this
problem?

Thanks for any help you can provide.

^ permalink raw reply	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2010-05-26 15:08 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-05-26 11:57 Is there a bug in 2.6.29-rc8 support of Ad-Hoc mode? Gordon, Charles
2010-05-26 13:28 ` John W. Linville
2010-05-26 15:07   ` Gordon, Charles
  -- strict thread matches above, loose matches on Subject: below --
2010-05-26  0:00 Charles Gordon

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