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/freebsd-10-stable/sys/dev/hyperv/netvsc/
H A Dif_hnvar.hdiff 307250 Thu Oct 13 21:02:42 MDT 2016 sephe MFC 306390-306392

306390
hyperv/hn: Suspend and resume the backend properly upon MTU change.

Suspend:
- Prevent the backend from being touched on TX path.
- Clear the RNDIS RX filter, and wait for RX to drain.
- Make sure that NVS see the chimney sending buffer and RXBUF
disconnection, before unlink these buffers from the channel.

Resume:
- Reconfigure the RNDIS filter.
- Allow TX path to work on the backend.
- Kick start the TX eof task, in case the OACTIVE is set.

This fixes various panics, when the interface has traffic and MTU
is being changed.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8046

306391
hyperv/hn: Reorganize the synthetic parts detach.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8047

306392
hyperv/hn: Reorder the comment a little bit.

Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8048

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