From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753614AbeBSTE6 (ORCPT ); Mon, 19 Feb 2018 14:04:58 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:53112 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753560AbeBSTE5 (ORCPT ); Mon, 19 Feb 2018 14:04:57 -0500 Date: Mon, 19 Feb 2018 20:04:54 +0100 From: Pavel Machek To: Sakari Ailus Cc: pali.rohar@gmail.com, sre@kernel.org, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com, abcloriens@gmail.com, clayton@craftyguy.net, martijn@brixit.nl, Filip =?utf-8?Q?Matijevi=C4=87?= Subject: Re: v4.13 on nokia n900: oops during tethering Message-ID: <20180219190454.GB19366@amd> References: <20180212201000.GA25608@amd> <20180213222412.GA1116@mara.localdomain> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="cPi+lWm09sJ+d57q" Content-Disposition: inline In-Reply-To: <20180213222412.GA1116@mara.localdomain> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --cPi+lWm09sJ+d57q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! > On Mon, Feb 12, 2018 at 09:10:00PM +0100, Pavel Machek wrote: > > Hi! > >=20 > > During tethering, I got oops in ssi_stop_tx(), followed by failure of > > GPRS. I used GPRS tethering a lot with some older kernel, and it was > > stable for hours. > >=20 > > It seems v4.12 has the same problem. In v4.15 usb networking does not > > work at all, so I can't test... v4.10 seems to have similar problem. (T= esting is > > slighlty tricky, as my internet connection is ... tethering using > > N900.) >=20 > Based on a quick look ssi_stop_tx() is called too many times (i.e. once > more than ssi_start_tx()). This would appear to be an interal problem > with the SSI codebase (or whatever lies there; I don't know the current > codebase). If I change BUG_ON in ssi_stop_tx() to warning and return, I see the warning and system survives it. > Did this work in the past? When? There appear to have been changes in IRQ > handling some time in 2016... Actually, I'm not sure any more :-(. I did have tethering running overnight some time ago, but it was on slower mobile data, and over wifi. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --cPi+lWm09sJ+d57q Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlqLH9YACgkQMOfwapXb+vIHsACdHeFJXa7lW8T4XvB/Fmk9W9xp 0v0AniVhg8FnM63kPy+jXVlcHtH0eGvO =dZOh -----END PGP SIGNATURE----- --cPi+lWm09sJ+d57q--