RE: [PATCH] [NET]: Fix Ooops of napi net_rx_action.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Joonwoo Park wrote:
> 2007/12/12, Brandeburg, Jesse <[email protected]>:
>> 
>> all drivers using NAPI in 2.6.24+ (NNAPI??) must return zero here,
>> after calling netif_rx_complete.  netif_rx_complete plus work_done
>> != 0 causes a bug. 
>> 
> 
> Brandeburg,
> Don't we need to return non-zero work_done after netif_rx_complete if
> work_done != weight?

Actually we just need to make sure we don't return work_done == weight
as it is checked on line 2210 of dev.c.
I should also note that I was wrong above, and that the requirement is
that we MUST not return work_done == weight when indicating
netif_rx_complete.

So, returning 0 when we actually did some work, but are being removed
from the poll list because something like !netif_running, is probably
okay, but I'm sure someone will disagree with me.  Maybe returning like
this would be better
diff --git a/drivers/net/e1000/e1000_main.c
b/drivers/net/e1000/e1000_main.c
index 724f067..76d5e3b 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -3933,6 +3933,10 @@ quit_polling:
                        e1000_set_itr(adapter);
                netif_rx_complete(poll_dev, napi);
                e1000_irq_enable(adapter);
+               if (work_done == weight)
+                       return work_done - 1;
+               else
+                       return work_done;
        }

        return work_done;

Jesse

 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux