From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stable-owner@vger.kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 6AD79C46467
	for <stable@archiver.kernel.org>; Tue,  3 Jan 2023 15:13:17 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S233189AbjACPNQ (ORCPT <rfc822;stable@archiver.kernel.org>);
        Tue, 3 Jan 2023 10:13:16 -0500
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44258 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S230337AbjACPNO (ORCPT
        <rfc822;stable@vger.kernel.org>); Tue, 3 Jan 2023 10:13:14 -0500
Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d])
        by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18148FAC2
        for <stable@vger.kernel.org>; Tue,  3 Jan 2023 07:13:12 -0800 (PST)
Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74])
        (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
         key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512)
        (No client certificate requested)
        by smtp-out2.suse.de (Postfix) with ESMTPS id B422867A50;
        Tue,  3 Jan 2023 15:13:10 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa;
        t=1672758790; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:
         mime-version:mime-version:content-type:content-type:
         in-reply-to:in-reply-to:references:references;
        bh=J/q0XYjWdcHcGHvf2zvFOmE/CmItt9EEwaXdou/KhH8=;
        b=hQs+sGmQcm2RbaGaJhnN3eAUr3OuguTcxtUHSRFK+7nKTWQuuT8RXeHFYTxgEPOe30Ei70
        E+mY8bDqjtis2cmOjHL9dKJNsonV/fne2f33UU6fSz7hky6TQNH/WO1kYQ4CW0wnijA6O0
        e3KbnAZUNQko0kL5w+qAu4EYpDoiPpc=
DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;
        s=susede2_ed25519; t=1672758790;
        h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:
         mime-version:mime-version:content-type:content-type:
         in-reply-to:in-reply-to:references:references;
        bh=J/q0XYjWdcHcGHvf2zvFOmE/CmItt9EEwaXdou/KhH8=;
        b=l6pZyvdCpCtizyaWnlXpWTmbm4Trzo4KW0IcjXXhCcHRsc3yvlRtRly9dkaEwmI/jei2w0
        9a44YgN+q3MZRNAQ==
Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74])
        (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
         key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512)
        (No client certificate requested)
        by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 898B41390C;
        Tue,  3 Jan 2023 15:13:10 +0000 (UTC)
Received: from dovecot-director2.suse.de ([192.168.254.65])
        by imap2.suse-dmz.suse.de with ESMTPSA
        id iibJIAZGtGPwYgAAMHmgww
        (envelope-from <tiwai@suse.de>); Tue, 03 Jan 2023 15:13:10 +0000
Date:   Tue, 03 Jan 2023 16:13:10 +0100
Message-ID: <87bknfr6rd.wl-tiwai@suse.de>
From:   Takashi Iwai <tiwai@suse.de>
To:     Michael Ralston <michael@ralston.id.au>
Cc:     Thorsten Leemhuis <regressions@leemhuis.info>,
        alsa-devel@alsa-project.org, regressions@lists.linux.dev,
        stable@vger.kernel.org, Jaroslav Kysela <perex@perex.cz>,
        Takashi Iwai <tiwai@suse.com>
Subject: Re: USB-Audio regression on behringer UMC404HD
In-Reply-To: <CAC2975+cUqiFC0LO-D-fi0swH+x=_FMuG+==mhg6HH4pc_YDRA@mail.gmail.com>
References: <CAC2975JXkS1A5Tj9b02G_sy25ZWN-ys+tc9wmkoS=qPgKCogSg@mail.gmail.com>
        <bf646395-1231-92f6-7c5a-5b7765596358@leemhuis.info>
        <87zgb0q7x4.wl-tiwai@suse.de>
        <CAC2975K24Gt3rGieAToHjb7FEHv84aqiRSQx7EOuR2Q7KByUXw@mail.gmail.com>
        <87sfgrrb5f.wl-tiwai@suse.de>
        <CAC2975+cUqiFC0LO-D-fi0swH+x=_FMuG+==mhg6HH4pc_YDRA@mail.gmail.com>
User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.2 Mule/6.0
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset=US-ASCII
Precedence: bulk
List-ID: <stable.vger.kernel.org>
X-Mailing-List: stable@vger.kernel.org

On Tue, 03 Jan 2023 16:05:18 +0100,
Michael Ralston wrote:
> 
> On Wed, 4 Jan 2023 at 00:38, Takashi Iwai <tiwai@suse.de> wrote:
> >
> > Thanks; that's helpful.
> >
> > Could you try to revert the commit
> > 9902b303b5ade208b58f0dd38a09831813582211
> >     ALSA: usb-audio: Avoid unnecessary interface change at EP close
> as a blind shot?
> >
> > Also, there has been a series of fixes for other issues, and it might
> > be worth to try as well:
> >   https://lore.kernel.org/r/20230102170759.29610-1-tiwai@suse.de
> >
> 
> I built 3 kernels: one with the reverted commit, one with the patches
> you linked, and one with both. These builds were based on 6.1.2.
> 
> None of them worked. Also, even though I continued to boot with
> snd_usb_audio.dyndbg=+p, none of the kernel logs showed the debug
> messages that the other versions did. I'm baffled why this is.

That's weird.  Is snd_usb_audio driver bound with the device at all?
That is, does it appear in /proc/asound/cards?


Takashi