PROBLEM:        (47944)         (Patch ID: OSF375-048)
********
A bug in the DECchip 21140A device used on the DE500-AA controller causes
reporting of bad incoming packets by the device as being without error.

In most situations, the packet will be discarded by higher-level protocols,
such as TCP/IP, due to checksum failures.  However, this is not always
guaranteed.

The network interface may hang due to the receive process coming to a halt
within the DE500-AA controller.  However, no specific symptoms can be
predicted if and when the data-corruption occurs.  It should be noted that
the bug has only been observed during heavy receive stress testing, and is
most likely to occur when the 21140A has poor write access to memory through
the host bridge.

In this patch, the driver recognizes the condition that a bad packet may
have been delivered as good one by the device, and takes the appropriate
action (ensures packet is not propogated further into the protocol layers).

PROBLEM:        (S00100882)     (Patch ID: OSF375-066)
********
This patch fixes a problem that occurs on an SMP system with a
tu (Tulip) Ethernet interface.

The system panics with the following error message:

        System Uncorrectable Machine Check 660 (retry set)

PROBLEM:        (ZUO101134/QAR 52226)   (Patch ID: OSF375-067)
********
This patch is an upgrade/replacement for the ethernet driver when
a DE500-AA Fast Ethernet interface is used.  This driver, when used
with a DE500-AA containing the DECchip 21140-AC, will allow filtering
of greater than 16 multicast addresses and fixes the previous limitations
to Hash/Perfect mode filtering.