Comment 13 for bug 1735546

@mhcerri
I only tested Gen1 VM (4.13.0-1004-azure-edge) on my local Hyper-V host (WS 2016), and couldn't repro the issue, i.e. reloading hv_netvsc and changing MTU worked fine.

As I understand, I think the bug was originally reported against 4.13.0-1001.1 (I did not test this version). That's why I think somehow the bug was fixed in 4.13.0-1004-azure-edge.

Ubuntu-azure-edge-4.13.0-1001.1 is 567ef14ee13c5c4e336121106cc19733800d618e, and
Ubuntu-azure-edge-4.13.0-1004.4 is 21d8a99f88af972684618521cf19adafe24dc566.

There are non-trivial changes between them:

root@decui-1604:/opt/linux-azure# git diff 567ef14ee13c5c4e336121106cc19733800d618e 21d8a99f88af972684618521cf19adafe24dc566 -- drivers/hv/ drivers/net/hyperv/| wc -l
2353
root@decui-1604:/opt/linux-azure# git diff 567ef14ee13c5c4e336121106cc19733800d618e 21d8a99f88af972684618521cf19adafe24dc566 -- drivers/hv/ drivers/net/hyperv/| grep ^diff
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
diff --git a/drivers/hv/connection.c b/drivers/hv/connection.c
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
diff --git a/drivers/hv/hv_fcopy.c b/drivers/hv/hv_fcopy.c
diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
root@decui-1604:/opt/linux-azure# git diff 567ef14ee13c5c4e336121106cc19733800d618e 21d8a99f88af972684618521cf19adafe24dc566 -- drivers/hv/ drivers/net/hyperv/| wc -l
2353