mac80211: force use_short_slot=true for 5GHz

Normally 5GHz does not have a concept of long vs short slot time,
however the slot time that it ends up using is the same as for 2.4 GHZ
and use_short_slot == true
Because of that, it makes more sense to force use_short_slot = true
whenever 5 GHz is being used, so that this particular check does not
have to be in every single driver that uses this flag.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 2746391248d3..a82564e73d91 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -670,6 +670,8 @@ static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
         }
 
         use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
+        if (sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
+                use_short_slot = true;
 
         if (use_protection != bss_conf->use_cts_prot) {
                 bss_conf->use_cts_prot = use_protection;