diff options
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/chan.c | 44 |
1 files changed, 30 insertions, 14 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 344966496b70..1d25a462b145 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -277,6 +277,32 @@ void cfg80211_set_dfs_state(struct wiphy *wiphy, width, dfs_state); } +static u32 cfg80211_get_start_freq(u32 center_freq, + u32 bandwidth) +{ + u32 start_freq; + + if (bandwidth <= 20) + start_freq = center_freq; + 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) @@ -284,13 +310,8 @@ static int cfg80211_get_chans_dfs_required(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); @@ -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); |