The brcmsmac driver supports different rates on 5GHz but this is not
taken into account when providing the rate index in the receive
status information passed to mac80211.
Reviewed-by: Roland Vossen <rvossen@xxxxxxxxxxxx>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@xxxxxxxxxxxx>
Reviewed-by: Henry Ptasinski <henryp@xxxxxxxxxxxx>
Signed-off-by: Arend van Spriel <arend@xxxxxxxxxxxx>
---
drivers/staging/brcm80211/brcmsmac/mac80211_if.c | 9 +++++++--
drivers/staging/brcm80211/brcmsmac/mac80211_if.h | 6 ++++++
drivers/staging/brcm80211/brcmsmac/main.c | 8 ++++++++
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/brcm80211/brcmsmac/mac80211_if.c b/drivers/staging/brcm80211/brcmsmac/mac80211_if.c
index 7179edd..2370171 100644
--- a/drivers/staging/brcm80211/brcmsmac/mac80211_if.c
+++ b/drivers/staging/brcm80211/brcmsmac/mac80211_if.c
@@ -971,6 +971,10 @@ static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = {
.hw_value = (rate100m / 5), \
}
+/*
+ * The rate table is used for both 2.4G and 5G rates. The
+ * latter being a subset as it does not support CCK rates.
+ */
static struct ieee80211_rate legacy_ratetable[] = {
RATE(10, 0),
RATE(20, IEEE80211_RATE_SHORT_PREAMBLE),
@@ -1012,8 +1016,9 @@ static struct ieee80211_supported_band brcms_band_5GHz_nphy = {
.band = IEEE80211_BAND_5GHZ,
.channels = brcms_5ghz_nphy_chantable,
.n_channels = ARRAY_SIZE(brcms_5ghz_nphy_chantable),
- .bitrates = legacy_ratetable + 4,
- .n_bitrates = ARRAY_SIZE(legacy_ratetable) - 4,
+ .bitrates = legacy_ratetable + BRCMS_LEGACY_5G_RATE_OFFSET,
+ .n_bitrates = ARRAY_SIZE(legacy_ratetable) -
+ BRCMS_LEGACY_5G_RATE_OFFSET,
.ht_cap = {
.cap = IEEE80211_HT_CAP_GRN_FLD | IEEE80211_HT_CAP_SGI_20 |
IEEE80211_HT_CAP_SGI_40 |
diff --git a/drivers/staging/brcm80211/brcmsmac/mac80211_if.h b/drivers/staging/brcm80211/brcmsmac/mac80211_if.h
index fcd711a..7f290d7 100644
--- a/drivers/staging/brcm80211/brcmsmac/mac80211_if.h
+++ b/drivers/staging/brcm80211/brcmsmac/mac80211_if.h
@@ -20,6 +20,12 @@
#include <linux/timer.h>
#include <linux/interrupt.h>
+/*
+ * Starting index for 5G rates in the
+ * legacy rate table.
+ */
+#define BRCMS_LEGACY_5G_RATE_OFFSET 4
+
/* softmac ioctl definitions */
#define BRCMS_SET_SHORTSLOT_OVERRIDE 146
diff --git a/drivers/staging/brcm80211/brcmsmac/main.c b/drivers/staging/brcm80211/brcmsmac/main.c
index 7e729d29..339ab28 100644
--- a/drivers/staging/brcm80211/brcmsmac/main.c
+++ b/drivers/staging/brcm80211/brcmsmac/main.c
@@ -8252,6 +8252,14 @@ prep_mac80211_status(struct brcms_c_info *wlc, struct d11rxhdr *rxh,
wiphy_err(wlc->wiphy, "%s: Unknown rate\n", __func__);
}
+ /*
+ * For 5GHz, we should decrease the index as it is
+ * a subset of the 2.4G rates. See bitrates field
+ * of brcms_band_5GHz_nphy (in mac80211_if.c).
+ */
+ if (rx_status->band == IEEE80211_BAND_5GHZ)
+ rx_status->rate_idx -= BRCMS_LEGACY_5G_RATE_OFFSET;
+
/* Determine short preamble and rate_idx */
preamble = 0;
if (IS_CCK(rspec)) {
--
1.7.4.1
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