linux-kernel - Re: v4.19-rc3 on thinkpad x220: kernel BUG at kernel/dma/swiotlb.c:521 when enabling radios

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Message-ID: <20180916082227.GA4602@amd>
Date:   Sun, 16 Sep 2018 10:22:28 +0200
From:   Pavel Machek <pavel@....cz>
To:     Arend Van Spriel <arend.vanspriel@...adcom.com>,
        rdunlap@...radead.org
Cc:     Johannes Berg <johannes.berg@...el.com>,
        "Grumbach, Emmanuel" <emmanuel.grumbach@...el.com>,
        luciano.coelho@...el.com, linuxwifi@...el.com,
        linux-wireless@...r.kernel.org,
        kernel list <linux-kernel@...r.kernel.org>
Subject: Re: v4.19-rc3 on thinkpad x220: kernel BUG at
 kernel/dma/swiotlb.c:521 when enabling radios

Hi!

> > > I was running X220 with wireless disabled for long long time. Now I
> > > needed to enable it, and got...
> >
> > Tried with next-0913, and machine crashed with capslock LED blinking
> > when I toggled the switch...
> >
> > Any ideas?
> 
> Replying using my phone. There has been such a report from Randy Dunlap on
> September 11 with subject "4.19-rc[23] iwlwifi: BUG in swiotlb".
> 
> Did not quite follow that, just recall seeing it fly by. Maybe it helps.

Thanks for pointer.

Hi, Randy! We have same problem.

I switched back to v4.18, and it seems to be ok.

I'd prefer not to hear the b-word. Any other ideas?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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