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Date: Tue, 31 Oct 1995 13:56:54 -0500
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Subject: kern/805: SMC Ultra 8216 incorrectly probed (if_ed driver)
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>Number:         805
>Category:       kern
>Synopsis:       SMC Ultra 8216 incorrectly probed (if_ed driver)
>Confidential:   yes
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Oct 31 11:00:00 PST 1995
>Last-Modified:
>Originator:     Charles Henrich
>Organization:
    Charles Henrich     Michigan State University     henrich@crh.cl.msu.edu

                     http://rs560.msu.edu/~henrich/
>Release:        FreeBSD 2.1-STABLE i386 (1026-SNAP)
>Environment:

        Any PeeCee with a SMC Ultra 8216 network card
	

>Description:

        FreeBSD incorrectly identifies the card, and as a result assigns an
        8k iosize to the card, instead of the correct 16k.  

        > ed0 at 0x300-0x31f irq 10 maddr 0xcc000 msize 8192 on isa
        > ed0: address 00:00:c0:e5:a0:96, type SMC8416C/SMC8416BT (16 bit) 

        This misassignment forces these systems to be unable to do fast 
        network transfers.  It also causes a large amount of ring buffer 
        overrun's in the network code:

        "ed0: warning - receiver ring buffer overrun"

        Which also inhibits network performance.  This bug appeared after
        2.0.5R 

>How-To-Repeat:

        Boot any FreeBSD machine with an SMC Ultra card.
	

>Fix:
	
	

>Audit-Trail:
>Unformatted: