port-evbarm/52478: netbsd-7 evbarm port hangs on boot on Rasberry Pi Model B after pullups made on July 26

[dhgutteridge%sympatico.ca@localhost]

>Number:         52478
>Category:       port-evbarm
>Synopsis:       netbsd-7 evbarm port hangs on boot on Rasberry Pi Model B after pullups made on July 26
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-evbarm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 10 01:40:00 +0000 2017
>Originator:     David H. Gutteridge
>Release:        netbsd-7
>Organization:
>Environment:
(Kernel built from netbsd-7 branch sources updated following July 26)
>Description:
After upgrading my Raspberry Pi Model B to a kernel built with netbsd-7
branch sources after the pullups made on July 26th, it no longer
successfully boots. Instead it hangs with endless warnings about
usmsc0:

usmsc0: warning: Failed to write register 0x10c
usmsc0: warning: Failed to read register 0x114
usmsc0: warning: MII is busy
usmsc0: warning: Failed to write register 0x110
usmsc0: warning: Failed to read register 0x114
usmsc0: warning: MII is busy
usmsc0: warning: Failed to write register 0x100
usmsc0: warning: Failed to read register 0x114
usmsc0: warning: MII is busy
(This is repeated ad infinitum...)

>How-To-Repeat:
As above.
>Fix:
Unknown. I've reverted to an older kernel for now.