I am having some difficulties with a synklink_gt4 card and/or its
driver. I am trying to read/write 16384 byte frames. I seem to be able
to write them but can only read 4096 bytes of data per read. The
documentation I have for this card says I can have a MAX frame size of
between 4096 and 65535. And I see code in the driver that agrees with
that doc. I understand how to set the maxframe size for each port
properly but it doesn't seem to change this behavior.
This is making things sort of awkward. I can write a single 16384 byte
frame, but to read 16384 bytes I have to issue 4 reads. I seem to only
be able to read a max of 4096 bytes. I sort of need a single read to
read a single frame as I am able to do with the writes. I don't really
know if this is a synclink driver issue or something in the tty/hdlc
layer. It actually looks to me like the synclink driver its self is OK.
Am I missing something?
I've tried several kernel versions from 4.1 through the latest 4.5.2.
I don't find a maintainer in the MAINTANERs file so I've CC'd the
original author.
Thanks and Regards
Mark
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