linux-kernel - Re: ALSA/usb-audio: snd_usb_autoresume possible recursive locking detected

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Date:	Wed, 26 Aug 2015 19:29:29 +0600
From:	Alexander Kuleshov <kuleshovmail@...il.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Alexander Kuleshov <kuleshovmail@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, alsa-devel@...a-project.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: ALSA/usb-audio: snd_usb_autoresume possible recursive locking
 detected

On 08-26-15, Takashi Iwai wrote:
> On Wed, 26 Aug 2015 15:16:43 +0200,
> Alexander Kuleshov wrote:
> > 
> > On 08-26-15, Takashi Iwai wrote:
> > > 
> > > Ah, sorry, this was the missing refcount increment at resume.
> > > Below is the revised patch.  In the final form, it'll be split to a
> > > few parts, but now it's all folded for ease of testing.
> > > 
> > 
> > Hello Takashi,
> > 
> > sorry for delay, just made a test with the last patch and finally
> > dmesg is clear.
> 
> Great, thanks for many tests!
> 
> I tried the autopm on my machine, but strangely I couldn't reproduce
> this lockdep warning.  Could you give your kconfig?  I'd like to
> check.

Yes, my .config: http://pastebin.com/N2e8TTtK
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