[PATCH] net/netvsc: fix number Tx queues > Rx queues

[Alan Elder]

> Subject: RE: [PATCH] net/netvsc: fix number Tx queues > Rx queues
> 
> > Subject: Re: [PATCH] net/netvsc: fix number Tx queues > Rx queues
> >
> > On Thu, 29 Feb 2024 19:29:11 +0000
> > Alan Elder <alan.elder at microsoft.com> wrote:
> >
> > > The previous code allowed the number of Tx queues to be set higher
> > > than the number of Rx queues.  If a packet was sent on a Tx queue
> > > with index
> > > >= number Rx queues there was a segfault.
> > >
> > > This commit fixes the issue by creating an Rx queue for every Tx
> > > queue meaning that an event buffer is allocated to handle receiving
> > > Tx completion messages.
> > >
> > > mbuf pool and Rx ring are not allocated for these additional Rx
> > > queues and RSS configuration ensures that no packets are received on
> them.
> > >
> > > Fixes: 4e9c73e96e83 ("net/netvsc: add Hyper-V network device")
> > > Cc: sthemmin at microsoft.com
> > > Cc: stable at dpdk.org
> > >
> > > Signed-off-by: Alan Elder <alan.elder at microsoft.com>
> >
> > Don't have Azure account to test, but looks good to me.
> >
> > Acked-by: Stephen Hemminger <stephen at networkplumber.org>
> 
> Please hold on while we are discussing this patch internally with its interaction
> with MANA.
> 
> Long

Thanks for the feedback Long and Stephen.  We've discussed the interaction with MANA and I think we're good to go ahead with this now.  I've submitted v2 of the patch with a minor fix.

Cheers,
Alan