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authorJohannes Berg <johannes@sipsolutions.net>2008-03-16 18:34:33 +0100
committerJohn W. Linville <linville@tuxdriver.com>2008-03-25 16:41:55 -0400
commit906c730a2db950b7bce4ef17d65399acd791c360 (patch)
tree75df7353a1407fdcdca45e6f289ab0f25b2361af
parent857485c0c46ceee5c658c1761bba4d9a5ddf433f (diff)
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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>
-rw-r--r--include/net/wireless.h6
-rw-r--r--net/wireless/util.c23
2 files changed, 29 insertions, 0 deletions
diff --git a/include/net/wireless.h b/include/net/wireless.h
index c7f805ee554..f4b77ab66ba 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -304,4 +304,10 @@ extern int ieee80211_channel_to_frequency(int chan);
*/
extern int ieee80211_frequency_to_channel(int freq);
+/**
+ * ieee80211_get_channel - get channel struct from wiphy for specified frequency
+ */
+extern struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy,
+ int freq);
+
#endif /* __NET_WIRELESS_H */
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 77336c22fcf..f3e623df351 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -33,6 +33,29 @@ int ieee80211_frequency_to_channel(int freq)
}
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)
{