cfg80211: add bitrate for 20MHz MCS 9

Some drivers (ath10k) report MCS 9 @ 20MHz, which
technically isn't defined. To get more meaningful value
than 0 out of this however, just extrapolate a bitrate
from ratio of MCS 7 and 9 in channels where it is allowed.

Signed-off-by: Thomas Pedersen <twp@qca.qualcomm.com>
[add a comment about it in the code]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/util.c b/net/wireless/util.c
index 5ea12afc770610e88a2b8ad870d08676fa2a71c9..659b507b347d6a5d183baab16665ace0a03ae672 100644 (file)
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1158,7 +1158,8 @@ static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)
                   58500000,
                   65000000,
                   78000000,
-                  0,
+               /* not in the spec, but some devices use this: */
+                  86500000,
                },
                {  13500000,
                   27000000,