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Re: [PATCH v5 0/4] add VHT support to minstrel_ht

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On Mon, Oct 20, 2014 at 05:13:02PM +0200, Karl Beldan wrote:
> On Mon, Oct 20, 2014 at 04:49:06PM +0200, Johannes Berg wrote:
> > On Mon, 2014-10-20 at 15:45 +0200, Karl Beldan wrote:
> > > From: Karl Beldan <karl.beldan@xxxxxxxxxxxxxxxx>
> > > 
> > > Hi,
> > > 
> > > Varka Bhadram reported checkpatch is noisy on this series.
> > > I made another pass which affects [2/4](trivially) and [4/4].
> > > This could have been a patch on top of what Felix acked, I hope you
> > > won't bother too much.
> > 
> > This series introduces the following new sparse/smatch complaints:
> > 
> >   CHECK   /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht.c
> > /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht.c:246:18: warning: cast to restricted __le16
> > /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht.c:1227:49: warning: incorrect type in argument 3 (different base types)
> > /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht.c:1227:49:    expected unsigned short [unsigned] [usertype] mcs_map
> > /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht.c:1227:49:    got restricted __le16 [usertype] tx_mcs_map
> > 
> > Here it looks like the argument to minstrel_get_valid_vht_rates() should
> > be declared __le16.
> > 
> Indeed, will resending only 4/4 do ?
> 
> >   CHECK   /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht_debugfs.c
> > /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht_debugfs.c:47 minstrel_ht_stats_dump() error: testing array offset 'i' after use.
> > /home/johannes/sys/wireless/net/mac80211/rc80211_minstrel_ht_debugfs.c:61 minstrel_ht_stats_dump() error: testing array offset 'i' after use.
> > 
> > Here I'm not sure, seems like it's a false positive maybe? The array
> > seems large enough for everything that's going on here.
> > 
> False positive.
> I am using CF="-Wsparse-all" and I don't get those warnings with sparse
> 0.4.5, I'll update.
> 
I don't get those with smatch either .. what options are you using ?
Thanks for the pass.
 
Karl
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