RE: changing usbnet's API to better deal with cdc-ncm

-----Original Message-----
From: Ming Lei [mailto:tom.leiming@gmail.com]
Sent: Friday, September 07, 2012 2:58 PM

quoted

Several issues need to be improved:
Tx path:
1. IP packets must be accumulated in one NTB. Currently it's done via

data copy.

quoted

Preferred way would be a possibility to have a list of skb-s in

resulting frame sent down.

Looks the copy is inevitable because the buffer length of each skb in
the list is not possible to be max endpoint packet aligned, so one
short packet may terminate the current tx urb transfer.

Zero or short packet shall not be added if resulting NTB is max negotiated size.
It's yet another problem with usbnet, where we had to add some workarounds
to avoid redundant short/zero packets.

Regards,
Alexey