Re: [lwlan-devel] Linux-wlan-ng and xen

Richard,

The patch doesn't have any detrimental effect - at least, the
suspend/resume problems you describe haven't affected my machine, and
I've even noticed that the interface seems to get an IP address after
resume which it wasn't doing before. Unfortunately, it doesn't solve the
problem I was having with xen - it (or something at least) is still
getting confused about whether it's a wlan0 or a wlan1. The config is
all set up for a wlan0, but when I start xen, the interface dies and
when I reload it, it reloads with wlan1 in /proc/net/p80211, rather than
wlan0, so nothing much works after that. I'm wondering if there's
anything in my xen setup I can fiddle with - it does all sorts of weird
things, setting up a network bridge and virtual interfaces left right
and centre so I wonder if fiddling with some of that will help.

Regards
David

Richard Kennedy wrote:
> On Fri, 2006-06-16 at 13:16 +0100, Gee, David wrote:
>   
>> Richard,
>>
>> Thanks for your thoughts. Where can I get hold of this patch from? Is
>> there an SVN or CVS repo with all the patches in - I'm already running
>> the FC5 udev patch, now there's this reference counting one too - it
>> would be nice if I could download a 'clean' copy from somewhere. I
>> haven't had time to do much in-depth diagnosis  of the problem yet.
>> Unloading and reloading it didn't work, even if I stopped the xen
>> service, something somewhere was getting well and truly broken. Since
>> you mention resume I'll bring up something else odd I've noticed - for
>> some reason after a resume, my card (a Netgear MA111 USB thingy)
>> doesnn't pick up and IP address and I have to do an ifdown and ifup to
>> get it to pick up an address. Any ideas?
>>
>> Regards
>> David
>>
>>     
> David,
>
> Here's the patch. I posted it to to wlan-dev list some time ago, but it
> didn't generate much interest. So, I don't think anyone else has tried
> it -- you may want to proceed with caution  :).
> I'll be very interested to know if you try this and what effect ( if
> any) it has.
>
> Patches just get posted to the wlan-dev list, and Solomon includes them
> in his SVN repos -- if he likes them!
>
> I don't know what's happening with suspend/resume, it doesn't work for
> me at all. Without the attached patch my laptop hangs on resume -- with
> it the wlan card doesn't start up again but everything else is OK.
>
> However, I had the same thing with dhcp-ing a ip address on boot - so I
> added a delay into the wlan-udev script and that solved it. I'm guessing
> that it's just a sequence/ timing issue somewhere. I'm not sure where
> you could put a delay into the resume cycle -- but if you can find
> somewhere it may help.
>
> My card is built in to the laptop so never gets removed -- and I find
> that if the module get unloaded without being disabled first, it hangs
> and will never accept usb commands (messages in the log), until it's had
> a full power cycle. Maybe your seeing something similar ?
>
> I would like to get the driver to send the disable message to the card
> on module unload and see if that helps. but I haven't 1) found the right
> place in the code to put it and 2) found the time to do much with it :)
>
> Cheers
> Richard
>
>
>   
> ------------------------------------------------------------------------
>
> Index: src/prism2/driver/hfa384x_usb.c
> ===================================================================
> --- src/prism2/driver/hfa384x_usb.c	(revision 1772)
> +++ src/prism2/driver/hfa384x_usb.c	(working copy)
> @@ -686,7 +686,13 @@
>  	DBFENTER;
>  
>  	memset(hw, 0, sizeof(hfa384x_t));
> +
> +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16))
> +	// ref count the usb device
> +	hw->usb = usb_get_dev(usb);
> +#else
>  	hw->usb = usb;
> +#endif
>  
>  	/* set up the endpoints */
>  	hw->endp_in = usb_rcvbulkpipe(usb, 1);
> @@ -784,7 +790,12 @@
>  	/* Now to clean out the auth queue */
>          while ( (skb = skb_dequeue(&hw->authq)) ) {
>                  dev_kfree_skb(skb);
> -        }		
> +        }
> +	
> +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16))
> +	// release ref count on  usb device
> +	usb_put_dev(hw->usb);
> +#endif
>  
>  	DBFEXIT;
>  }
>

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