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authorJohannes Berg <johannes.berg@intel.com>2021-06-18 12:41:39 +0200
committerJohannes Berg <johannes.berg@intel.com>2021-06-23 13:05:08 +0200
commitbe989891e4f2ff5649bf22ab05a7cdd3a287e34b (patch)
treea88914e257bf7657cbfd1c339ab9b84ad56845bb /net/wireless/chan.c
parentcfg80211: reg: improve bad regulatory warning (diff)
downloadlinux-be989891e4f2ff5649bf22ab05a7cdd3a287e34b.tar.xz
linux-be989891e4f2ff5649bf22ab05a7cdd3a287e34b.zip
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>
Diffstat (limited to 'net/wireless/chan.c')
-rw-r--r--net/wireless/chan.c33
1 files changed, 32 insertions, 1 deletions
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);