Re: RPI usb can get stuck

[Frank Kardel <kardel%netbsd.org@localhost>]

On 04/09/15 20:40, Iain Hibbert wrote:
> On Thu, 9 Apr 2015, Frank Kardel wrote:
>
> > Using an USB-Serial adapter I experience ucb lockups in 7.99.9.
> >
> > Device (from dmesg):
> > uslsa0 at uhub1 port 3 configuration 1 interface 0
> > uslsa0: Silicon Labs ELV USB-WDE1 WetterdatenempfM-CM-$nger, rev 1.10/1.00,
> > addr 4
> > ucom0 at uslsa0: Silicon Labs CP210x
> by chance, I just filed PR 49831 relating to a kernel panic upon closing a
> ucom device. I don't know if related as different architecture, different
> device :)
I think I have seen a panic also playing around with it long enough, but 
trouble starts earlier.
Your bug seems to be different. My issue seems to be cause by a 
communication error.
> > ~.> [stuck here]
> but it dies in ucomclose() the same .. does your kernel have DIAGNOSTIC
> enabled?
Yepp.
> my workaround, was to unplug the USB device instead of closing the device,
> which seemed to work properly.
Not a real option when you need to travel 600km just for the plug game 
:-) This application is supposed to run as monitor in a remote area, so 
reliable USB would be nice.
BTW: The device works flawlessly on a Bananapi.
> regards,
> iain
Thanks
  Frank