wireless: add wiphy channel freq to channel struct lookup helper
Add ieee80211_get_channel() which gets you a channel struct for a
specific wiphy if that channel is present in that wiphy.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 77336c2..f3e623d 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -33,6 +33,29 @@
}
EXPORT_SYMBOL(ieee80211_frequency_to_channel);
+struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy,
+ int freq)
+{
+ enum ieee80211_band band;
+ struct ieee80211_supported_band *sband;
+ int i;
+
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+ sband = wiphy->bands[band];
+
+ if (!sband)
+ continue;
+
+ for (i = 0; i < sband->n_channels; i++) {
+ if (sband->channels[i].center_freq == freq)
+ return &sband->channels[i];
+ }
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(ieee80211_get_channel);
+
static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
enum ieee80211_band band)
{