Description:  This patch fixes three problems.

         1)  Incorrect sequence in handling simultaneous
             interrupts.  Causes "invalid command in ARB=0xff"
             message.

         2)  Error counter overflow conditions was not
             handled properly.  Now the errors are
             logged to the console and the counters
             are reset.

         3)  Removes a timeout when ifconfig down and
             then halt.

Fix:     Apply this patch to the DEC 88 release (rcsid 12.3)
         and rebuild kernel.

Bugs:    There remains an problem when disconnecting the
         token ring cable at the adapter end only.  The
         adapter does not get reset properly.  DO NOT
         disconnect cable at adapter end or reboot will
         be necessary.
