diff options
| author | Johannes Berg | 2021-06-18 13:41:39 +0300 |
|---|---|---|
| committer | Johannes Berg | 2021-06-23 13:05:08 +0200 |
| commit | be989891e4f2ff5649bf22ab05a7cdd3a287e34b (patch) | |
| tree | a88914e257bf7657cbfd1c339ab9b84ad56845bb | |
| parent | b767ecdaf98a999ef710f4f290bdd89257a90db0 (diff) | |
cfg80211: add cfg80211_any_usable_channels()
This helper function checks if there are any usable channels on
any of the given bands with the given properties (as expressed
by disallowed channel flags).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210618133832.2b613addaa85.Idaf8b859089490537878a7de5c7453a873a3f638@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | include/net/cfg80211.h | 11 | ||||
| -rw-r--r-- | net/wireless/chan.c | 33 |
2 files changed, 43 insertions, 1 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 7b4ef45d49b0..481e4e24800f 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -895,6 +895,17 @@ ieee80211_chandef_max_power(struct cfg80211_chan_def *chandef) } /** + * cfg80211_any_usable_channels - check for usable channels + * @wiphy: the wiphy to check for + * @band_mask: which bands to check on + * @prohibited_flags: which channels to not consider usable, + * %IEEE80211_CHAN_DISABLED is always taken into account + */ +bool cfg80211_any_usable_channels(struct wiphy *wiphy, + unsigned long band_mask, + u32 prohibited_flags); + +/** * enum survey_info_flags - survey information flags * * @SURVEY_INFO_NOISE_DBM: noise (in dBm) was filled in diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 472c895823a4..869c43d4414c 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -6,7 +6,7 @@ * * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> * Copyright 2013-2014 Intel Mobile Communications GmbH - * Copyright 2018-2020 Intel Corporation + * Copyright 2018-2021 Intel Corporation */ #include <linux/export.h> @@ -1339,3 +1339,34 @@ cfg80211_get_chan_state(struct wireless_dev *wdev, WARN_ON(1); } } + +bool cfg80211_any_usable_channels(struct wiphy *wiphy, + unsigned long sband_mask, + u32 prohibited_flags) +{ + int idx; + + prohibited_flags |= IEEE80211_CHAN_DISABLED; + + for_each_set_bit(idx, &sband_mask, NUM_NL80211_BANDS) { + struct ieee80211_supported_band *sband = wiphy->bands[idx]; + int chanidx; + + if (!sband) + continue; + + for (chanidx = 0; chanidx < sband->n_channels; chanidx++) { + struct ieee80211_channel *chan; + + chan = &sband->channels[chanidx]; + + if (chan->flags & prohibited_flags) + continue; + + return true; + } + } + + return false; +} +EXPORT_SYMBOL(cfg80211_any_usable_channels); |