mwl8k: properly set receive status rate index on 5 GHz receive

The mwl8k firmware uses indices into the 2.4 GHz band rate table for
the receive descriptor channel field even if the packet was received
on a 5 GHz channel, while mac80211 expects an index into the 5 GHz
band rate table when packets are received on the 5 GHz band, which
presents a mismatch as the 5 GHz band rate table lacks the five
non-OFDM rates that the 2.4 GHz rate table starts with.

To handle this properly, we need to substract 5 from the rate index
field if the packet was received on a 5 GHz channel (and was not
received at an MCS rate).

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index 13dded49323e..cc2ce61b7992 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -759,7 +759,13 @@ mwl8k_rxd_8366_ap_process(void *_rxd, struct ieee80211_rx_status *status,
                 }
         }
 
-        status->band = IEEE80211_BAND_2GHZ;
+        if (rxd->channel > 14) {
+                status->band = IEEE80211_BAND_5GHZ;
+                if (!(status->flag & RX_FLAG_HT))
+                        status->rate_idx -= 5;
+        } else {
+                status->band = IEEE80211_BAND_2GHZ;
+        }
         status->freq = ieee80211_channel_to_frequency(rxd->channel);
 
         *qos = rxd->qos_control;
@@ -850,7 +856,13 @@ mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
         if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
                 status->flag |= RX_FLAG_HT;
 
-        status->band = IEEE80211_BAND_2GHZ;
+        if (rxd->channel > 14) {
+                status->band = IEEE80211_BAND_5GHZ;
+                if (!(status->flag & RX_FLAG_HT))
+                        status->rate_idx -= 5;
+        } else {
+                status->band = IEEE80211_BAND_2GHZ;
+        }
         status->freq = ieee80211_channel_to_frequency(rxd->channel);
 
         *qos = rxd->qos_control;