> Subject: Re: [PATCH 03/12] net: mana: Handle vport sharing between devices > > On Tue, 17 May 2022 02:04:27 -0700 > longli@xxxxxxxxxxxxxxxxx wrote: > > > diff --git a/drivers/net/ethernet/microsoft/mana/mana.h > b/drivers/net/ethernet/microsoft/mana/mana.h > > index 51bff91b63ee..26f14fcb6a61 100644 > > --- a/drivers/net/ethernet/microsoft/mana/mana.h > > +++ b/drivers/net/ethernet/microsoft/mana/mana.h > > @@ -375,6 +375,7 @@ struct mana_port_context { > > unsigned int num_queues; > > > > mana_handle_t port_handle; > > + atomic_t port_use_count; > > Could this be a refcount_t instead? > The refcount_t has protections against under/overflow. Thanks for pointing this out. I will use refcount_t for v2. Long