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

From: Pavel Machek
Date: Sun Sep 16 2018 - 04:23:05 EST


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
--
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