linux-kernel - Re: [Bug 10868] Oops on loading ipaq module since 2.6.26, prevents use of device

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Date:	Mon, 7 Jul 2008 21:19:17 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Matthias Geissert <matthias.geissert@....de>
Cc:	Adrian Bunk <bunk@...nel.org>,
	Adam Williamson <awilliamson@...driva.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arjan van de Ven <arjan@...radead.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...hat.com>, bugme-daemon@...zilla.kernel.org,
	Greg KH <greg@...ah.com>, linux-usb@...r.kernel.org
Subject: Re: [Bug 10868] Oops on loading ipaq module since 2.6.26, prevents use of device

Am Montag 07 Juli 2008 20:16:02 schrieb Matthias Geissert:
> Am Donnerstag, 3. Juli 2008 16:08:44 schrieb Oliver Neukum:
> 
> 
> > >  	.num_interrupt_in =	NUM_DONT_CARE,
> > > -	.num_bulk_in =		1,
> > > -	.num_bulk_out =		1,
> > > -	.num_ports =		1,
> > > +	.num_bulk_in =		NUM_DONT_CARE,
> > > +	.num_bulk_out =		NUM_DONT_CARE,
> >
> > This is good.
> >
> > > +	.num_ports =		2,
> >
> > This is fatal.
> 
> I checked what you said with kernel 2.6.26 rc9.  I set num_ports to 5. It 
> worked quite well until I tried to connect to a non-existing endpoint. 
> 
> However, the problem is that the Yakumo Delta needs to connect to the 2nd 
> endpoint. You can connect to the first one but you don't get any data. 
> 
> Is there any good way to tell the ipaq driver to use the 2nd endpoint? Maybe 
> one could provide a different struct usb_serial_driver ipaq_device depending 
> on the usb id or an option which tells the driver to use 2 endpoints.

If only these devices have a second input endpoint, we can detect that
in attach().

	Regards
		Oliver
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