ath6kl: fix link speed when using sgi

The MSB of rate index from FW is used for sgi. But the ath6kl_wmi_get_rate
doesn't handle it. The access to wmi_rate_tbl array may be out of range
if sgi is 1. This may cause the return value of ath6kl_wmi_get_rate()
function is incorrect link rate. We add sgi adjustment to avoid such case.

kvalo: change patch title

Signed-off-by: Dengke Qiu <dqiu@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index a638151cf861..e916e57c9d9a 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -1792,6 +1792,9 @@ struct rx_stats {
         a_sle32 ucast_rate;
 } __packed;
 
+#define RATE_INDEX_WITHOUT_SGI_MASK     0x7f
+#define RATE_INDEX_MSB     0x80
+
 struct tkip_ccmp_stats {
         __le32 tkip_local_mic_fail;
         __le32 tkip_cnter_measures_invoked;