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Commit 906c730a authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
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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: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 857485c0

include/net/wireless.h

+6 −0
Original line number Diff line number Diff line
@@ -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 */

net/wireless/util.c

+23 −0
Original line number Diff line number Diff line
@@ -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)

{