From 83685091acb878980711c3b28fe42e8959583e84 Mon Sep 17 00:00:00 2001 From: Dengke Qiu Date: Tue, 28 Aug 2012 15:33:42 +0800 Subject: [PATCH] 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 Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath6kl/wmi.c | 13 ++++++++++++- drivers/net/wireless/ath/ath6kl/wmi.h | 3 +++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c index e95b035168ad..cd2db42c0989 100644 --- a/drivers/net/wireless/ath/ath6kl/wmi.c +++ b/drivers/net/wireless/ath/ath6kl/wmi.c @@ -3263,10 +3263,21 @@ int ath6kl_wmi_set_regdomain_cmd(struct wmi *wmi, const char *alpha2) s32 ath6kl_wmi_get_rate(s8 rate_index) { + u8 sgi = 0; + if (rate_index == RATE_AUTO) return 0; - return wmi_rate_tbl[(u32) rate_index][0]; + /* SGI is stored as the MSB of the rate_index */ + if (rate_index & RATE_INDEX_MSB) { + rate_index &= RATE_INDEX_WITHOUT_SGI_MASK; + sgi = 1; + } + + if (WARN_ON(rate_index > RATE_MCS_7_40)) + rate_index = RATE_MCS_7_40; + + return wmi_rate_tbl[(u32) rate_index][sgi]; } static int ath6kl_wmi_get_pmkid_list_event_rx(struct wmi *wmi, u8 *datap, 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; -- 2.20.1