Check if interface supports Device Polling

[Eduardo Meyer]

Is there another way to check if a certain interface supports polling,
other than reading polling(4)? I would like to have a script to check
it, issuing something like

ifconfig -v -m <nic>

How can I list all NIC capabilities? Would polling be listed if the
driver supports?

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Eduardo Meyer
pessoal: dudu.meyer at gmail.com
profissional: ddm.farmaciap at saude.gov.br