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cfg80211: add channel flag to prohibit OFDM operation

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Currently the only way for wireless drivers to tell whether or not OFDM
is allowed on the current channel is to check the regulatory
information. However, this requires hodling cfg80211_mutex, which is not
visible to the drivers.

Other regulatory restrictions are provided as flags in the channel
definition, so let's do similarly with OFDM. This patch adds a new flag,
IEEE80211_CHAN_NO_OFDM, to tell drivers that OFDM on a channel is not
allowed. This flag is set on any channels for which regulatory indicates
that OFDM is prohibited.

Signed-off-by: Seth Forshee <[email protected]>
Tested-by: Arend van Spriel <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Seth Forshee 2012-08-01 15:58:42 -05:00 • committed by Johannes Berg
commit 03f6b0843a
2 changed files with 4 additions and 0 deletions
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2
net/wireless/reg.c
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@ -680,6 +680,8 @@ static u32 map_regdom_flags(u32 rd_flags)
channel_flags |= IEEE80211_CHAN_NO_IBSS;
if (rd_flags & NL80211_RRF_DFS)
channel_flags |= IEEE80211_CHAN_RADAR;
if (rd_flags & NL80211_RRF_NO_OFDM)
channel_flags |= IEEE80211_CHAN_NO_OFDM;
return channel_flags;
}