From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Mack Subject: Re: [alsa-devel] alsa crash with =?windows-1252?Q?=93_ALSA_s?= =?windows-1252?Q?ound/usb/urb=2Ec=3A179_cannot_submit_urb_=28err?= =?windows-1252?Q?_=3D_-27=29=94_on_imx6q_sabrelite?= Date: Wed, 11 Sep 2013 14:55:42 +0200 Message-ID: <5230684E.6030900@gmail.com> References: <522C9061.5070303@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Ankit Agarwal Cc: alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org, "linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" List-Id: alsa-devel@alsa-project.org On 11.09.2013 14:53, Ankit Agarwal wrote: > > On Sun, Sep 8, 2013 at 8:27 PM, Daniel Mack > wrote: > > On 02.09.2013 12:51, Ankit Agarwal wrote: > > I am using alsa pcm player to listen to audio. The alsa pcm > crashes with > > the error: ALSA sound/usb/urb.c:179 cannot submit urb (err = -27). > I am > > able to hear the data initially but when other transaction begins > on HID > > report endpoint, alsa crashes with the mentioned error. > > -27 == -EFBIG, which seems to relate to a scheduling problem on the bus, > and hence probably rather to a host controller bug than an issue with > snd-usb. > > > I am working on imx6q board with linux kernel-3.0.35. I am using Apple > > device to get the digital audio. > > Please try with a more recent kernel, and see if you can find the > location where EFBIG is initially reported. > > > I have found that EFBIG is being reported by ehci-host controller. It is > coming from file ehci-sched.c under iso_stream_schedule() function. The > error is thrown when the controller tries to schedule the urb too far > into the future, ie, there is overflow of the scheduled URBs. I might be > happening because the URBs are not scheduled properly. Ok. What about trying a newer kernel? The issue might be fixed already. In any case, this does not seem related to snd-usb, so I copied the usb list. Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html