Subject: Re: [PATCH net-next V2 13/16] net: fec: print more debug info in fec_timeout

From: Joe Perches <[email-masked]>
Date: Fri, 04 Mar 2016 09:35:47 -0800

On Fri, 2016-03-04 at 09:05 -0700, Troy Kisky wrote:
> On 3/4/2016 3:06 AM, Fugang Duan wrote:
> > From: Troy Kisky <[email-masked]> Sent: Thursday, February 25, 2016 8:37 AM
[]
> > > Print the current interrupt flags and mask and the interrupt state during the last
> > > interrupt in fec_timeout.
[]
> > > diff --git a/drivers/net/ethernet/freescale/fec_main.c
[]
> > > @@ -1107,6 +1107,9 @@ fec_timeout(struct net_device *ndev)
> > >  	int i;
> > >  	uint events = 0;
> > > 
> > > +	pr_err("%s: last=%x %x, mask %x\n", __func__, fep->last_ievents,
> > > +	       readl(fep->hwp + FEC_IEVENT), readl(fep->hwp + FEC_IMASK));
> > > +
> > pr_err() -> netdev_err()
> Sounds good

This seems like debugging information rather than
an error a user can do anything with and if there's
a timeout, how likely is it that the hardware is
hosed and this would  repetitively and unnecessarily
fill up logs?

So maybe netdev_dbg and net_ratelimit() too.

	if (net_ratelimit()
		netdev_<level>(etc...)