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Message-ID: <YxhkVmiMlKghq+nY@zx2c4.com>
Date: Wed, 7 Sep 2022 11:28:54 +0200
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: Takashi Iwai <tiwai@...e.de>
Cc: alsa-devel@...a-project.org, LKML <linux-kernel@...r.kernel.org>,
stable <stable@...r.kernel.org>,
Niklāvs Koļesņikovs
<89q1r14hd@...ay.firefox.com>, Wim Taymans <wtaymans@...hat.com>
Subject: Re: [PATCH] ALSA: usb-audio: Don't refcount multiple accesses on the
single clock
On Wed, Sep 07, 2022 at 10:00:46AM +0200, Takashi Iwai wrote:
> On Mon, 05 Sep 2022 14:16:39 +0200,
> Jason A. Donenfeld wrote:
> >
> > On Mon, Sep 5, 2022 at 1:44 PM Takashi Iwai <tiwai@...e.de> wrote:
> > > When you load snd-usb-audio with dyndbg=+p option, does it show the
> > > new error message "Mismatched sample rate xxx"?
> >
> > No.
>
> What about the patch below?
>
>
> Takashi
>
> -- 8< --
> --- a/sound/usb/endpoint.c
> +++ b/sound/usb/endpoint.c
> @@ -925,6 +925,8 @@ void snd_usb_endpoint_close(struct snd_usb_audio *chip,
> endpoint_set_interface(chip, ep, false);
>
> if (!--ep->opened) {
> + if (ep->clock_ref && !atomic_read(&ep->clock_ref->locked))
> + ep->clock_ref->rate = 0;
> ep->iface = 0;
> ep->altsetting = 0;
> ep->cur_audiofmt = NULL;
I think this works.
Niklāvs - can you give it a try to and confirm?
Jason
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