Vincenzo Maffione
ac11d85740
iflib: initialize netmap with the correct number of descriptors ...
In case the network device has a RX or TX control queue, the correct
number of TX/RX descriptors is contained in the second entry of the
isc_ntxd (or isc_nrxd) array, rather than in the first entry.
This case is correctly handled by iflib_device_register() and
iflib_pseudo_register(), but not by iflib_netmap_attach().
If the first entry is larger than the second, this can result in a
panic. This change fixes the bug by introducing two helper functions
that also lead to some code simplification.
PR: 247647
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D25541
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ac11d85740