Re: regression: tethering fails in 3.5 with iwlwifi

[Artem Bityutskiy <artem.bityutskiy@linux.intel.com>]

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On Thu, 2012-09-20 at 15:22 +0200, Eric Dumazet wrote:
> On Thu, 2012-09-20 at 16:22 +0300, Artem Bityutskiy wrote:
> 
> > 
> > OK, I've tried almost this (see below) and it solves my issue:
> > 
> > diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
> > index 965e6ec..7f079d0 100644
> > --- a/net/mac80211/rx.c
> > +++ b/net/mac80211/rx.c
> > @@ -1798,9 +1798,13 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
> >  
> >                 if (skb) {
> >                         /* deliver to local stack */
> > -                       skb->protocol = eth_type_trans(skb, dev);
> > -                       memset(skb->cb, 0, sizeof(skb->cb));
> > -                       netif_receive_skb(skb);
> > +                       if (pskb_may_pull(skb, 40)) {
> > +                               skb->protocol = eth_type_trans(skb, dev);
> > +                               memset(skb->cb, 0, sizeof(skb->cb));
> > +                               netif_receive_skb(skb);
> > +                       } else {
> > +                               kfree_skb(skb);
> > +                       }
> >                 }
> >         }
> > 
> 
> OK but you cant do that, or small frames will be dropped.
> 
> Anyway its a hack, we should find the buggy layer.
> 
> You could use dropwatch (drop_monitor) to check where frame is dropped.
> 
> modprobe drop_monitor
> dropwatch -l kas

I do not have dropwatch in Tizen, I need to find the sources and compile
the user-space part. Any hint where to download it?

-- 
Best Regards,
Artem Bityutskiy

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