[PATCH net-next] mctp i2c: notify user space on TX failure

[Jeremy Kerr]

Hi Jakub,

> > @@ -551,6 +552,14 @@ static void mctp_i2c_xmit(struct mctp_i2c_dev *midev, struct sk_buff *skb)
> >                 dev_warn_ratelimited(&midev->adapter->dev,
> >                                      "__i2c_transfer failed %d\n", rc);
> >                 stats->tx_errors++;
> > +
> > +               sk = skb->sk;
> > +               if (sk) {
> > +                       sk->sk_err = -rc;
> > +                       if (!sock_flag(sk, SOCK_DEAD))
> > +                               sk_error_report(sk);
> > +               }
> 
> notifying socket in the xmit handler of a netdev is a bit strange,
> could you do it somewhere higher in the MCTP stack?

Sounds like that would be useful in general for MCTP, but we don't have
a facility for that at present.  Any existing implementation you would
suggest modelling this on?

Cheers,


Jeremy