Re: Fwd: Regression: Line6 Toneport stops working on 4.10-rc5

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On Mon, 06 Feb 2017 12:04:29 +0100,
Andrej Kruták wrote:
> 
> On Mon, Feb 6, 2017 at 12:01 PM, Takashi Iwai <tiwai@xxxxxxx> wrote:
> > On Mon, 06 Feb 2017 11:18:44 +0100,
> > Greg KH wrote:
> >>
> >> On Mon, Feb 06, 2017 at 01:01:56PM +0300, Igor Zinovev wrote:
> >> > Hello again!
> >> >
> >> > Thanks for the advice, but bisecting the whole tree took me quite a
> >> > while and I ended up stuck because booting on some bisect states has
> >> > led my system to run without some devices, like wireless and sound. So
> >> > I tried to bisect the sound/usb/line6 path. It turns out that this
> >> > commit is the point where it breaks for me:
> >> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/sound/usb/line6?id=f6a0dd107ad0c8b59d1c9735eea4b8cb9f460949
> >> >
> >> > In fact, when I apply the reverse patch on top of 4.10-rc7, it fixes
> >> > the problem for me.
> >>
> >> Wonderful, thanks so much for tracking this down!
> >>
> >> > Should I bring some of the people that are mentioned in the commit
> >> > into this conversation?
> >>
> >> I've done so now.  Andrej and Takashi, the above patch causes a
> >> regression for Igor, any thoughts?  Should we just revert it?
> >
> > Yeah, the patch looks wrong, the function line6_get_interval() should
> > be called unconditionally.
> >
> > I'm going to queue a revert for 4.10-final.
> >
> 
> Yep, on the first look it's suspicious. I'll have a look on it in the
> evening - not sure simple revert is the ideal solution... I'll get
> back to you.

I guess in this case the revert is the best option.
But I'll postpone it until tomorrow.  If you find a better solution,
please let me know.

> PS: Thanks for the bisecting, Igor!
> PPS: Maybe this should go also to 4.9 stable, once resolved...

Yes, definitely.


thanks,

Takashi
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