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cfg80211: simplify cfg80211_can_beacon_sec_chan API 

Change cfg80211_can_beacon_sec_chan() to return true
if there is no secondary channel to simplify all the
current users of it. They all check the channel type
before calling the function because it returns false
if there's no secondary channel.

Also actually document the return value.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-05-16 23:50:17 +02:00 committed by John W. Linville
parent 3d9e6e1207
commit d58e7e37aa
3 changed files with 11 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/net/cfg80211.h
View File

@ -3359,11 +3359,14 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
const u8 *frame, size_t len,
int freq, int sig_dbm, gfp_t gfp);
/*
/**
* cfg80211_can_beacon_sec_chan - test if ht40 on extension channel can be used
* @wiphy: the wiphy
* @chan: main channel
* @channel_type: HT mode
*
* This function returns true if there is no secondary channel or the secondary
* channel can be used for beaconing (i.e. is not a radar channel etc.)
*/
bool cfg80211_can_beacon_sec_chan(struct wiphy *wiphy,
struct ieee80211_channel *chan,

3
net/mac80211/ibss.c
View File

@ -82,8 +82,7 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
local->oper_channel = chan;
channel_type = ifibss->channel_type;
if (channel_type > NL80211_CHAN_HT20 &&
!cfg80211_can_beacon_sec_chan(local->hw.wiphy, chan, channel_type))
if (!cfg80211_can_beacon_sec_chan(local->hw.wiphy, chan, channel_type))
channel_type = NL80211_CHAN_HT20;
if (!ieee80211_set_channel_type(local, sdata, channel_type)) {
/* can only fail due to HT40+/- mismatch */

22
net/wireless/chan.c
View File

@ -60,7 +60,7 @@ bool cfg80211_can_beacon_sec_chan(struct wiphy *wiphy,
diff = -20;
break;
default:
return false;
return true;
}
sec_chan = ieee80211_get_channel(wiphy, chan->center_freq + diff);
@ -107,21 +107,11 @@ int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
wdev->iftype == NL80211_IFTYPE_AP ||
wdev->iftype == NL80211_IFTYPE_AP_VLAN ||
wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
wdev->iftype == NL80211_IFTYPE_P2P_GO)) {
switch (channel_type) {
case NL80211_CHAN_HT40PLUS:
case NL80211_CHAN_HT40MINUS:
if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, chan,
channel_type)) {
printk(KERN_DEBUG
"cfg80211: Secondary channel not "
"allowed to initiate communication\n");
return -EINVAL;
}
break;
default:
break;
}
wdev->iftype == NL80211_IFTYPE_P2P_GO) &&
!cfg80211_can_beacon_sec_chan(&rdev->wiphy, chan, channel_type)) {
printk(KERN_DEBUG
"cfg80211: Secondary channel not allowed to beacon\n");
return -EINVAL;
}
result = rdev->ops->set_channel(&rdev->wiphy,