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iflib: Take iri_pad into account when processing small frames
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Authored by kd on Apr 27 2021, 10:49 AM.

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Summary

Drivers can specify padding of received frames with iri_pad field.
This can be used to enforce ip alignment by hardware.
Iflib ignores that padding when processing small frames, which renders this feature inoperable.
I found it while writing a driver for a NIC that can ip align received packets.
Note that this doesn't change behavior of existing drivers as they all set iri_pad to 0.

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