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author | Michal Kazior <michal.kazior@tieto.com> | 2014-04-09 15:29:23 +0200 |
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committer | Johannes Berg <johannes.berg@intel.com> | 2014-04-25 17:08:15 +0200 |
commit | 6fa001bc7e1ccd7482f0f089fb970d65a5aca59a (patch) | |
tree | 2dad9dc3fdbaa55969573136636a3588061d930e /net/mac80211/util.c | |
parent | 65a124dd719d6e90591e4756bb04e1719489705e (diff) | |
download | op-kernel-dev-6fa001bc7e1ccd7482f0f089fb970d65a5aca59a.zip op-kernel-dev-6fa001bc7e1ccd7482f0f089fb970d65a5aca59a.tar.gz |
mac80211: add max channel calculation utility function
The utility function has no uses yet. It is aimed
at future chanctx reservation management and
channel switching.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/util.c')
-rw-r--r-- | net/mac80211/util.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 5a6cc33..7a376f8 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -2873,3 +2873,45 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, num_different_channels, radar_detect, num); } + +static void +ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, + void *data) +{ + u32 *max_num_different_channels = data; + + *max_num_different_channels = max(*max_num_different_channels, + c->num_different_channels); +} + +int ieee80211_max_num_channels(struct ieee80211_local *local) +{ + struct ieee80211_sub_if_data *sdata; + int num[NUM_NL80211_IFTYPES] = {}; + struct ieee80211_chanctx *ctx; + int num_different_channels = 0; + u8 radar_detect = 0; + u32 max_num_different_channels = 1; + int err; + + lockdep_assert_held(&local->chanctx_mtx); + + list_for_each_entry(ctx, &local->chanctx_list, list) { + num_different_channels++; + + if (ctx->conf.radar_enabled) + radar_detect |= BIT(ctx->conf.def.width); + } + + list_for_each_entry_rcu(sdata, &local->interfaces, list) + num[sdata->wdev.iftype]++; + + err = cfg80211_iter_combinations(local->hw.wiphy, + num_different_channels, radar_detect, + num, ieee80211_iter_max_chans, + &max_num_different_channels); + if (err < 0) + return err; + + return max_num_different_channels; +} |