From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5CE8C4741F for ; Fri, 6 Nov 2020 14:16:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C2275208B3 for ; Fri, 6 Nov 2020 14:16:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604672169; bh=dwqIrjREMpE3aCs5UsswQD8Vff2Vo/148pWll4qzmk4=; h=From:To:Cc:Subject:In-Reply-To:References:Date:List-ID:From; b=gX5nOMUjVWwEFdZktSIiQRrE89bWEFdLCBbS0SfDdXqSQoBgEsG2Z0hRO1EbBa/Gn i156NwEZR02w9WSn05JVIp+Kkl7I3FSO5mwtzbyrGL7oKdxXtJ5umry92M+GvsmG/L 7uPIC/wZiIJCH++hwaGcZ/Hl14PUYIIra3qRmHlo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727251AbgKFOQJ (ORCPT ); Fri, 6 Nov 2020 09:16:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:58190 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726812AbgKFOQI (ORCPT ); Fri, 6 Nov 2020 09:16:08 -0500 Received: from saruman (88-113-213-94.elisa-laajakaista.fi [88.113.213.94]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 66C962071A; Fri, 6 Nov 2020 14:16:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604672167; bh=dwqIrjREMpE3aCs5UsswQD8Vff2Vo/148pWll4qzmk4=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=pu+SiWaWYPwZLdf0gMuJ01ldNUL251wz6jEsxwpUcjpvVEzaRDx63q251MynjjSDZ gEvaPNDq0I1NenqpZSr29kZk8xrwTf7qu9bsMFLBvz8vDhga0vYtKxZJVeENve7p84 xmwUsAv/tZaAAfK+O7PVjuOfanCidrxHW8VWiM/U= From: Felipe Balbi To: Ferry Toth , Andy Shevchenko Cc: "linux-usb@vger.kernel.org" , Thinh Nguyen , Heikki Krogerus , Jack Pham Subject: Re: BUG with linux 5.9.0 with dwc3 in gadget mode In-Reply-To: <326aa23e-fabd-f3d6-4778-d036858413a2@gmail.com> References: <913dccca-500d-1938-b199-6eb67cfb60cc@gmail.com> <87a6wig461.fsf@kernel.org> <874kmpf583.fsf@kernel.org> <976cea12-e54e-fbca-6c53-e6ef5c554094@synopsys.com> <645b6ddc-d4f5-3f5b-b85f-b3d27fc365f5@synopsys.com> <2b6586e6-528c-86e8-9d92-0061bc44866d@gmail.com> <2cc783ac-6b71-190b-49fc-9e2bceeacd4b@gmail.com> <920590dc-5430-7f8b-b2e1-1a4c37f4dfbe@synopsys.com> <0089306e-e2ca-9a53-6ffb-202d028050ce@gmail.com> <30ab00e4-53ae-fd9e-1689-c94078a31625@gmail.com> <871rhin1yt.fsf@kernel.org> <87eel7q9bk.fsf@kernel.org> <326aa23e-fabd-f3d6-4778-d036858413a2@gmail.com> Date: Fri, 06 Nov 2020 16:15:59 +0200 Message-ID: <87blgar2ow.fsf@kernel.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi, Ferry Toth writes: >>>> Ferry Toth writes: >>>>> Op 27-10-2020 om 22:16 schreef Andy Shevchenko: >>>>>> On Tue, Oct 27, 2020 at 10:13 PM Ferry Toth wrote: >>>>>>> Op 22-10-2020 om 15:43 schreef Andy Shevchenko: >>>>>>>> On Thu, Oct 22, 2020 at 4:21 PM Thinh Nguyen wrote: >>>>>>>>> Ferry Toth wrote: >>>>>> ... >>>>>> >>>>>>>>> There are some fixes to dwc3 in kernel mainline. Is it possible t= o test >>>>>>>>> this against linux-next? >>>>>>>> I think the best is to wait for v5.10-rc1 and retest. >>>>>> Can you give a try of v5.10-rc1? >>>>> Yes, I just tried: >>>>> >>>>> I booted in host mode, then flip the switch. Gadget come up, go down >>>>> once, then come up again and stay up. >>>> please collect trace events. It's important to figure out why it's goi= ng >>>> down, even if only once. Make sure to collect trace *and* dmesg so we >>>> can correlate trace with the reenumeration that should show up in dmes= g. >>>> >>>> thanks >>> Sorry, I had to replace mobo. Now back on this. >>> >>> As is, on Edison I can record with something like "perf record -e >>> 'dwc3:dwc3_gadget*' -e 'gadget:*' -g -a". >>> Then get the trace buffer with "perf script > gadget.txt". Then at each >>> trace point we get a stack trace like: >>> >>> file-storage=C2=A0=C2=A0 831 [001]=C2=A0 4445.240038: dwc3:dwc3_gadget_= ep_cmd: [FAILED >>> TO PARSE] name=3Dep4in cmd=3D524295 param0=3D0 param1=3D0 param2=3D0 cm= d_status=3D0 >>> =C2=A0=C2=A0 =C2=A0ffffffff9a35b7e7 __traceiter_dwc3_gadget_ep_cmd+0x= 37 >>> ([kernel.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffff9a35b7e7 __traceiter_dwc3_gadget_ep_cmd+0x= 37 >>> ([kernel.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffff9a35fa40 dwc3_send_gadget_ep_cmd+0x320 ([k= ernel.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffff9a3606d0 __dwc3_gadget_kick_transfer+0x200= ([kernel.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffff9a361114 dwc3_gadget_ep_queue+0xe4 ([kerne= l.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffff9a3afc3a usb_ep_queue+0x2a ([kernel.kallsy= ms]) >>> =C2=A0=C2=A0 =C2=A0ffffffffc047c301 start_transfer.isra.0+0x21 ([kern= el.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffffc047c88a start_in_transfer.isra.0+0x3a ([k= ernel.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffffc047c93d send_status+0x8d ([kernel.kallsym= s]) >>> =C2=A0=C2=A0 =C2=A0ffffffffc047dd05 fsg_main_thread+0x3c5 ([kernel.ka= llsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffff99c853b9 kthread+0xf9 ([kernel.kallsyms]) >>> =C2=A0=C2=A0 =C2=A0ffffffff99c01a32 ret_from_fork+0x22 ([kernel.kalls= yms]) >>> >>> "perf list" shows the tracepoint events, the same as under >>> /sys/kernel/debug/tracing/events/ >>> >>> Question is which points to trace (above command fills buffer to 35MB in >>> 10sec). Do you have suggestions? >> don't enable any gadget event. Only dwc3 events. Also, enable *all* dwc3 >> events. Usually, I avoid perf when doing this and just go straight to >> /sys/kernel/trace/. > Ok, I can do that. But I'm not sure how I turn on tracing and capture=20 > the results. Got you covered ;-) https://www.kernel.org/doc/html/latest/driver-api/usb/dwc3.html#reporting-b= ugs =2D-=20 balbi --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQJFBAEBCAAvFiEElLzh7wn96CXwjh2IzL64meEamQYFAl+lWp8RHGJhbGJpQGtl cm5lbC5vcmcACgkQzL64meEamQaJ5hAA34PjQLp1Lw4DSqmuxLqrrULVbqwEEamu 5lCmOQcIr41wWeLu0XGiQhEZoTVK0euMgg6NP6Di1oyoz2NXtBUxeebQEhJ6XKm9 hpdyC8lMp3xrxYxyagcvNpoZgbyu2GwP3ZEOfA43L3UsscAPyESFQc4gzw6yayyE uar19WeN80Tiqk2msIskssT3hxv71M28+KlB3RDIDOV1308dJrhIdW3lt084NPjB n8MhBoSHrPrf75sehdag2e5O5qnDWvzrwioJ0C3Z1iXOTYRgZMb5rQ4duH5dzcg2 F+II/9Mi0xsjtqIAfMS9x6R4ZswS46mX0WPMJ3X/AytCyFQ9+6AWpNKPlEfpwHTt Q3jigS8RBRwQQkJcjKKtGhaq2n8ES7LuFXCZU5FKFS2GAr8XErdFBa2QljnZQ9sr HQeKwaaVrPjp/NbBd/5eUluKDWPCSaFSgXcFsUwdeniVGQkfQ3ff5wWRtdF/L1hn XIOtOMV63q1T1KcPQMI0aLBl1gMZVlGflVU1Xx7AK5XdxvVhWOpe3cT6L9XV1Zlk mYqaHgVjvsoLwhls5/iMk/Qs0qukt0gTnsW6BPFwECCFPkZDZbwa11yZSyI+YOb/ GqJpXNG7schQOalTPKSkQsEZMcX9r5v+kKWS+XtxDt28GLo0Bkmf5glCIcHDPupu Eo5x2Mhl+L4= =JixR -----END PGP SIGNATURE----- --=-=-=--