From: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx> Date: Sat, 13 Aug 2016 11:35:59 -0700 > This is how I think it should be fixed, but not tested yet. > > Subjec: netvsc: use device not module reference counts > > Fix how the cross-device reference counting is handled. When VF is > associated with the synthetic interface, the VF driver module should > still be able to be unloaded. The module unload code will callback > with NETDEV_UNREGISTER event which breaks the connection safely. > (Fixes 9f4b5ba5db4 hv_netvsc: Implement support for VF drivers on Hyper-V) > > Signed-off-by: Stephen Hemminger <sthemmin@xxxxxxxxxxxxxxxxx> This might not work. It is assumed that when a netdev unregister happens, it may be done so at any point in time. Therefore that NETDEV_UNREGISTER event must eliminate any and all references to a given netdev. And that works perfectly fine right now with all existing subsystems that take references to netdevs. You'll have to add something so that a NETDEV_UNREGISTER event tears this VF down and thus releases it's reference to the synthetic device. _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
