linux-kernel - Re: [PATCH 3/4] cfg80211: Join and Leave handling for OCB mode

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Date:	Thu, 09 Oct 2014 10:26:52 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Rostislav Lisovy <lisovy@...il.com>
Cc:	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	Michal Sojka <sojkam1@....cvut.cz>, s.sander@...dsys.de,
	jan-niklas.meier@...kswagen.de, burak.simsek@...kswagen.de,
	Emmanuel Thierry <emmanuel.thierry@...oko.fr>,
	laszlo.virag@...msignia.com,
	Rostislav Lisovy <rostislav.lisovy@....cvut.cz>
Subject: Re: [PATCH 3/4] cfg80211: Join and Leave handling for OCB mode

On Thu, 2014-09-11 at 16:30 +0200, Rostislav Lisovy wrote:
> Signed-off-by: Rostislav Lisovy <rostislav.lisovy@....cvut.cz>

A bit more commit log would be good :)

> +++ b/include/net/cfg80211.h
> @@ -375,6 +375,8 @@ static inline enum nl80211_channel_type
>  cfg80211_get_chandef_type(const struct cfg80211_chan_def *chandef)
>  {
>  	switch (chandef->width) {
> +	case NL80211_CHAN_WIDTH_5:
> +	case NL80211_CHAN_WIDTH_10:
>  	case NL80211_CHAN_WIDTH_20_NOHT:
>  		return NL80211_CHAN_NO_HT;

This is wrong, the old nl80211_channel_type simply cannot express a 5 or
10 MHz width - so this case should WARN() or something and really never
ever be called here.

Also, it doesn't really belong into this patch?

> +struct ocb_setup {
> +	struct cfg80211_chan_def chandef;
> +};

kernel-doc would be appreciated.

> @@ -892,6 +893,13 @@ cfg80211_get_chan_state(struct wireless_dev *wdev,
>  				*radar_detect |= BIT(wdev->chandef.width);
>  		}
>  		return;
> +	case NL80211_IFTYPE_OCB:
> +		if (wdev->chandef.chan) {
> +			*chan = wdev->chandef.chan;
> +			*chanmode = CHAN_MODE_EXCLUSIVE;
> +			return;
> +		}

same as in the mac80211 patch - I don't see why this should be
exclusive.

> +	WARN_ON(!setup->chandef.chan);

if (WARN_ON(...))
	return -EINVAL;

would be better

johannes

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