Mark Pizzolato 2459a4c697 PDP11, VAX: Add logic to receive buffer descriptor processing to avoid list overrun. ...

If a driver sets up a receive buffer descriptor list as a circular ring, the
potential exists for a burst of arriving packets to wrap around the receive
buffer ring in a single round of input processing.  This is avoided by
stopping list processing when a full circle has been observed.

Additionally, debug output has been added to display issues while
processing both the receive buffer descriptor list and the transmit buffer
descriptor list.  The debug bit names are RBDL and XBDL respectively.

2016-01-20 11:13:28 -08:00

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