linux-kernel - Re: kernel 5.4.11: problems with usb sound cards

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Message-ID: <20200203082908.GR10381@localhost>
Date:   Mon, 3 Feb 2020 09:29:08 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     edes <edes@....net>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, Johan Hovold <johan@...nel.org>
Subject: Re: kernel 5.4.11: problems with usb sound cards

On Mon, Feb 03, 2020 at 08:57:41AM +0100, Takashi Iwai wrote:
> On Mon, 03 Feb 2020 00:28:16 +0100,
> edes wrote:
> > 
> > 
> > el 2020-02-02 a las 14:41 Johan Hovold escribió:
> > 
> > > I realised I forgot the test to match on the device descriptor when
> > > applying the blacklist. It doesn't matter currently since I only enable
> > > the quirk for your device, but if you haven't tested the patch already,
> > > would you mind testing the below patch instead?
> > 
> > Hi, Johan, thank you for looking into this. I tested your patch, and it
> > works! (5.4.11 and 5.5.0).
> > 
> > I haven't performed extensive tests, but the card is again recognized as
> > both playback and capture device. Thank you!
> > 
> > Is this and acceptable solution and will this patch be integrated into the
> > kernel?
> 
> I don't mind where to blacklist; we may add a similar quirk in
> USB-audio driver side, too.

I'm afraid it needs to be done in core since this info is needed while
parsing the descriptors.

Johan