9601 Divide by zero in i40e_get_available_resources()
Review Request #1116 - Created June 19, 2018 and updated
This fixes the num_ports calculation in the i40e driver. Without this fix we sometimes (at least with the hardware where I tested this on) found more ethernet ports than we actually have (four instead of two) and this lead to panic later in the driver.
I tested this on a hardware where the original driver paniced. With the fix the driver does not panic and it works properly.
I think this seems reasonable, but we should add a README to the main i40e directory noting our differences to the Intel common code ala uts/common/io/e1000api/README.illumos otherwise we're likely to have someone accidentally clobber this in an update. I'll see if I can follow up with Intel to update this fact.