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authorJohannes Berg <johannes.berg@intel.com>2012-11-23 14:23:30 +0100
committerJohannes Berg <johannes.berg@intel.com>2012-11-23 14:23:30 +0100
commit0172bb75073e11a5aa9d8a953bdaefb8709f00c8 (patch)
treeb9531431496b682f4933aa479a9e7c1baabd68a0 /net/mac80211/scan.c
parent03ae834faac9831181ae471543d9f640b75c652b (diff)
downloadlinux-stericsson-0172bb75073e11a5aa9d8a953bdaefb8709f00c8.tar.gz
cfg80211: use DS or HT operation IEs to determine BSS channel
Currently, mac80211 checks the DS params IE if present and uses it for the (primary) BSS channel, instead of the one that the frame was received on. This is particularly useful in the 2.4 GHz band since a frame is often received on one of the adjacent channels due to overlap. Move this code to cfg80211 so other drivers also do this. Additionally, on 5 GHz, in particular with some (possibly) upcoming changes in 802.11ai and duplicate transmissions when wider channels are used, something similar happens. So if present, also use the (primary) channel information contained in the HT operation IE. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/scan.c')
-rw-r--r--net/mac80211/scan.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 13d23299e696..ddd1a9aaff38 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -174,7 +174,6 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
u8 *elements;
struct ieee80211_channel *channel;
size_t baselen;
- int freq;
bool beacon;
struct ieee802_11_elems elems;
@@ -209,13 +208,7 @@ void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb)
ieee802_11_parse_elems(elements, skb->len - baselen, &elems);
- if (elems.ds_params && elems.ds_params_len == 1)
- freq = ieee80211_channel_to_frequency(elems.ds_params[0],
- rx_status->band);
- else
- freq = rx_status->freq;
-
- channel = ieee80211_get_channel(local->hw.wiphy, freq);
+ channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
return;