[ofa-general] [PATCH] IB/IPoIB: Fix change mtu when switching to UD mode

[Or Gerlitz]

Eli Cohen wrote:
>
> use the kernel function dev_set_mtu() instead of directly setting dev->mtu. This is necessary so any other subsystem that need to know about this will (this is done through the call to call_netdevice_notifiers().
Please note that a flow which invokes call_netdevice_notifiers() should 
be wrapped by rtnl_lock()/rtnl_unlock() and the context should be made 
sleepable /non-atomic, etc the the consumers of this event might go to 
sleep (eg on memory allocation for the skb of the netlink event to user 
space etc).

Eli, yes, using dev_set_mtu() seems the correct way to go, even though I 
don't think it explains any of the ipoib problems I have came across 
over the last days, which I reported to you on the list, so in that 
respect I don't really understand your other email where you have 
pointed to me the mtu/setting issue.

Or.