[PATCH net] ibmvnic: device remove has higher precedence over reset

[Sukadev Bhattiprolu]

Lijun Pan [lijunp213 at gmail.com] wrote:
> > > diff --git a/drivers/net/ethernet/ibm/ibmvnic.c
> > > b/drivers/net/ethernet/ibm/ibmvnic.c
> > > index aed985e08e8a..11f28fd03057 100644
> > > --- a/drivers/net/ethernet/ibm/ibmvnic.c
> > > +++ b/drivers/net/ethernet/ibm/ibmvnic.c
> > > @@ -2235,8 +2235,7 @@ static void __ibmvnic_reset(struct work_struct
> > > *work)
> > >       while (rwi) {
> > >               spin_lock_irqsave(&adapter->state_lock, flags);
> > >
> > > -             if (adapter->state == VNIC_REMOVING ||
> > > -                 adapter->state == VNIC_REMOVED) {
> > > +             if (adapter->state == VNIC_REMOVED) {

If the adapter is in REMOVING state, there is no point going
through the reset process. We could just bail out here. We
should also drain any other resets in the queue (something
my other patch set was addressing).

Sukadev

> >
> > If we do get here, we would crash because ibmvnic_remove() happened. It
> > frees the adapter struct already.
> 
> Not exactly. viodev is gone; netdev is gone; ibmvnic_adapter is still there.
> 
> Lijun