linux-kernel - Re: cdc-acm driver hangs on poll() call

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Date:	Tue, 21 Apr 2009 15:39:23 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Maróy Ákos <akos@...oy.hu>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: cdc-acm driver hangs on poll() call - 2.6.27, works on 2.6.24

Am Dienstag 21 April 2009 15:33:03 schrieb Maróy Ákos:
> Oliver,
>
> > Does it happen with 2.6.29?
>
> haven't tried yet. I'm just upgrading to ubuntu 9.04, which has 2.6.28
> built in.
>
> I also see cdc-acm fixes in the 2.6.28 Changelog, like:
>
> USB: gadget: cdc-acm deadlock fix

That's gadget code. Your problem is on the host's side.

>
> > Could you get dmesg of 2.6.2(7/9) with CONFIG_USB_DEBUG and debug
> > activated in drivers/usb/class/cdc-acm.c ?
>
> ok, let me upgrade to 2.6.28 first, and if the proplem still persists,
> I'll compile 2.6.29 with the above settings manually.

Thanks.

	Regards
		Oliver

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