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Commit 40d1ba63 authored by Janusz Dziedzic's avatar Janusz Dziedzic Committed by Johannes Berg
Browse files

cfg80211: add helper functions for start/end freq 



Add helper fuctions for start/end freq.

Signed-off-by: default avatarJanusz Dziedzic <janusz.dziedzic@tieto.com>
Reviewed-by: default avatarLuis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent c17aa52c

net/wireless/chan.c

+30 −14
Original line number Diff line number Diff line
@@ -277,21 +277,42 @@ void cfg80211_set_dfs_state(struct wiphy *wiphy, 
				     width, dfs_state);

}



static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,

					    u32 center_freq,

static u32 cfg80211_get_start_freq(u32 center_freq,

				   u32 bandwidth)

{

	struct ieee80211_channel *c;

	u32 freq, start_freq, end_freq;

	u32 start_freq;



	if (bandwidth <= 20) {

	if (bandwidth <= 20)

		start_freq = center_freq;

		end_freq = center_freq;

	} else {

	else

		start_freq = center_freq - bandwidth/2 + 10;



	return start_freq;

}



static u32 cfg80211_get_end_freq(u32 center_freq,

				 u32 bandwidth)

{

	u32 end_freq;



	if (bandwidth <= 20)

		end_freq = center_freq;

	else

		end_freq = center_freq + bandwidth/2 - 10;



	return end_freq;

}



static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,

					    u32 center_freq,

					    u32 bandwidth)

{

	struct ieee80211_channel *c;

	u32 freq, start_freq, end_freq;



	start_freq = cfg80211_get_start_freq(center_freq, bandwidth);

	end_freq = cfg80211_get_end_freq(center_freq, bandwidth);



	for (freq = start_freq; freq <= end_freq; freq += 20) {

		c = ieee80211_get_channel(wiphy, freq);

		if (!c)
@@ -337,13 +358,8 @@ static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, 
	struct ieee80211_channel *c;

	u32 freq, start_freq, end_freq;



	if (bandwidth <= 20) {

		start_freq = center_freq;

		end_freq = center_freq;

	} else {

		start_freq = center_freq - bandwidth/2 + 10;

		end_freq = center_freq + bandwidth/2 - 10;

	}

	start_freq = cfg80211_get_start_freq(center_freq, bandwidth);

	end_freq = cfg80211_get_end_freq(center_freq, bandwidth);



	for (freq = start_freq; freq <= end_freq; freq += 20) {

		c = ieee80211_get_channel(wiphy, freq);