tree 41676f4b27a17fb9b75ba47b33f0bdf6756adcf6
parent 8b71d285061181f91194114cc7dabce73185eed1
author Logan Gunthorpe <logang@deltatee.com> 1465320022 -0600
committer Jon Mason <jdmason@kudzu.us> 1470406866 -0400

ntb_transport: Check the number of spads the hardware supports

I'm working on hardware that currently has a limited number of
scratchpad registers and ntb_ndev fails with no clue as to why. I
feel it is better to fail early and provide a reasonable error message
then to fail later on.

The same is done to ntb_perf, but it doesn't currently require enough
spads to actually fail. I've also removed the unused SPAD_MSG and
SPAD_ACK enums so that MAX_SPAD accurately reflects the number of
spads used.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>