Re: 4.20.7: pl2303 not working (post-4.19 regression) (limited info so far, not yet bisected)

From: Greg KH
Date: Sat Feb 16 2019 - 14:48:05 EST

On Sat, Feb 16, 2019 at 04:26:30PM +0000, Nix wrote:
> So I just tried to connect up to my ancient Soekris firewall's serial
> console to try to bisect a problem where it stopped booting in 4.20, and
> found I couldn't.
> minicom says:
> minicom: cannot open /dev/ttyUSB0: Input/output error
> and in the dmesg we see
> [705576.028170] pl2303 ttyUSB0: failed to submit interrupt urb: -28
> Booting to 4.19, everything works fine. (A random GalliumOS Chromebook
> running 4.9.4 works fine too, not that that confirmation is terribly
> useful.)
> This is an extremely preliminary report in case it's instantly obvious
> what's going on: I'll do enough investigation to produce an actually
> useful bug report, including bisecting this, after I've bisected the
> *other* non-booting bug, but that might not be until next weekend. (All
> this for a firewall I was trying to decommission! bah :) )

bisection would be great, thanks!

greg k-h