Re: [Bug 292695] rpi3b+ muge0 panic on shutdown

On 1/27/26 07:40, bob prohaska wrote:
> On Mon, Jan 26, 2026 at 07:38:48AM -0800, Mark Millard wrote:
>> On 1/26/26 07:00, Warner Losh wrote:
>>>
>>>
>>> On Mon, Jan 26, 2026 at 1:41 AM Alex Samorukov <[email protected]
>>> <mailto:[email protected]>> wrote:
>>>
>>>
>>>     On 26.01.2026 8:24, Adrian Chadd wrote:
>>>     >> Kindly asking to review and merge if possible,
>>>     >>
>>>     >> https://bz-attachments.freebsd.org/attachment.cgi?id=267455
>>>     <https://bz-attachments.freebsd.org/attachment.cgi?id=267455>
>>>     > hi!
>>>     >
>>>     > Hm! So, is the panic because the callout is running during shutdown?
>>>     > Chances are you want to set the flag early in detach, and then go
>>>     > through the shutdown
>>>     > path of cancel/draining the poll callout, it should catch it 100%
>>>     > without needing the pause!
>>>
>>>     Hi Adrian. Thank you for review and you absolutely right, USB draining
>>>     eliminates need for the pause
>>>
>>>     I updated both patches:
>>>
>>>     https://bugs.freebsd.org/bugzilla/attachment.cgi?
>>>     id=267497&action=diff <https://bugs.freebsd.org/bugzilla/
>>>     attachment.cgi?id=267497&action=diff>
>>>
>>>     https://bugs.freebsd.org/bugzilla/attachment.cgi?
>>>     id=267496&action=diff <https://bugs.freebsd.org/bugzilla/
>>>     attachment.cgi?id=267496&action=diff>
>>>
>>>
>>> Both those patches look good to me. Adrian?
>>>
>>> Warner 
>>
>> Do any of the other 7 sys/dev/usb/net/if_*.c using mii_pollstat need
>> similar changes?
>>
>> # grep -rl mii_pollstat /usr/src/sys/dev/usb/net/ | sort
>> /usr/src/sys/dev/usb/net/if_aue.c
>> /usr/src/sys/dev/usb/net/if_axe.c
>> /usr/src/sys/dev/usb/net/if_axge.c
>> /usr/src/sys/dev/usb/net/if_mos.c
>> /usr/src/sys/dev/usb/net/if_muge.c
>> /usr/src/sys/dev/usb/net/if_rue.c
>> /usr/src/sys/dev/usb/net/if_smsc.c
>> /usr/src/sys/dev/usb/net/if_udav.c
>> /usr/src/sys/dev/usb/net/if_ure.c
>>
> 
> Are there any instances of similar code being used in
> USB disk-related components of FreeBSD?  

Looks like only usb/net/ :

# grep -rl mii_pollstat /usr/src/sys/dev/usb/ | sort
/usr/src/sys/dev/usb/net/if_aue.c
/usr/src/sys/dev/usb/net/if_axe.c
/usr/src/sys/dev/usb/net/if_axge.c
/usr/src/sys/dev/usb/net/if_mos.c
/usr/src/sys/dev/usb/net/if_muge.c
/usr/src/sys/dev/usb/net/if_rue.c
/usr/src/sys/dev/usb/net/if_smsc.c
/usr/src/sys/dev/usb/net/if_udav.c
/usr/src/sys/dev/usb/net/if_ure.c

> 
> At the moment an armv7 Pi2B is apparently stuck in
> some sort of loop flashing its USB-sata disk activity LED.
> 
> It was running buildworld but is now unresponsive on
> both network (ping reports neither error nor reply, just
> 100% packet loss) and serial console (enter-tilda-control-B 
> elicits no response, restarting tip _and_ its controlling 
> ssh session makes no difference). 
> 
> It's unclear how long this situation has persisted, but I've
> been watching for close to half an hour and plan to let it
> go a bit longer in hopes someone has better ideas.
> 
> Meanwhile a Pi2B v1.1 using a USB-pata disk is continuing 
> to make progress on buildworld. It had a head start and 
> likely remains ahead.
> 
> Thanks for reading!
> 
> bob prohaska 
> 
> 


-- 
===
Mark Millard
marklmi at yahoo.com