lkml.org 
[lkml]   [2009]   [Apr]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [Bug #12490] ath5k related kernel panic in 2.6.29-rc1
From
Date
On Tue, 2009-04-07 at 20:46 -0400, Bob Copeland wrote:
> On Tue, Apr 07, 2009 at 12:03:45PM +0200, Johannes Berg wrote:
> >
> > > Anyway here's a patch to buy some time. Johannes, would this be
> > > an acceptable band-aid for now?
> >
> > This is going to make it print two warnings for one occurrence of the
> > problem though. I'd much prefer to put something into minstrel.c to
> > catch when _it_ returns bogus values and in that case return 0, that way
> > at least the bandaid is restricted to the code it patches up.
>
> Ok, then maybe something like this?
>
> I think this covers most of the bases: if the driver is returning crap or
> the ->cb gets corrupted, it'll get caught in tx_status. If minstrel
> stuffs a -1 in the first slot for any other reason we'll get a warning
> before get_tx_rate and a hopefully valid index gets substituted.

Yeah, that looks nicer, thanks.

> diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
> index 3824990..1cf7152 100644
> --- a/net/mac80211/rc80211_minstrel.c
> +++ b/net/mac80211/rc80211_minstrel.c
> @@ -181,6 +181,11 @@ minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband,
> if (ar[i].idx < 0)
> break;
>
> + if (WARN(ar[i].idx >= mi->n_rates,
> + "minstrel: invalid rate report %d (n=%d)\n",
> + ar[i].idx, mi->n_rates))
> + break;

It might be easier to print this in hex -- that way things like 0x6b are
more apparent?

johannes
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2009-04-08 02:59    [W:0.089 / U:0.400 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site