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authorKarl Beldan <karl.beldan@rivierawaves.com>2013-04-15 18:28:21 +0200
committerJohannes Berg <johannes.berg@intel.com>2013-04-16 15:59:08 +0200
commitfbd647b17689d584748bad62395cd1161d42d37c (patch)
treebd513410018d31ec19d764aa8a22ca147512edcb /net/mac80211
parent7a7da6ee0ea3443cd5111adffa80a3daba4bb8df (diff)
downloadlinux-fbd647b17689d584748bad62395cd1161d42d37c.tar.bz2
mac80211: fix rate control tx handler for VHT rates
Handle VHT rates like HT ones, otherwise we easily trigger the pre-HT rates WARN_ON(rc_rate->idx >= sband->n_bitrates) which will set rc_rate->idx to -1. Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/tx.c31
1 files changed, 17 insertions, 14 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index c93483fd477e..bb82c873f774 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -742,16 +742,18 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
}
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+ struct ieee80211_tx_rate *rc_rate = &info->control.rates[i];
+
/*
* make sure there's no valid rate following
* an invalid one, just in case drivers don't
* take the API seriously to stop at -1.
*/
if (inval) {
- info->control.rates[i].idx = -1;
+ rc_rate->idx = -1;
continue;
}
- if (info->control.rates[i].idx < 0) {
+ if (rc_rate->idx < 0) {
inval = true;
continue;
}
@@ -760,36 +762,37 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
* For now assume MCS is already set up correctly, this
* needs to be fixed.
*/
- if (info->control.rates[i].flags & IEEE80211_TX_RC_MCS) {
- WARN_ON(info->control.rates[i].idx > 76);
+ if (rc_rate->flags & IEEE80211_TX_RC_MCS) {
+ WARN_ON(rc_rate->idx > 76);
+ continue;
+ }
+
+ if (rc_rate->flags & IEEE80211_TX_RC_VHT_MCS) {
+ WARN_ON(ieee80211_rate_get_vht_mcs(rc_rate) > 9);
continue;
}
/* set up RTS protection if desired */
if (rts)
- info->control.rates[i].flags |=
- IEEE80211_TX_RC_USE_RTS_CTS;
+ rc_rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
/* RC is busted */
- if (WARN_ON_ONCE(info->control.rates[i].idx >=
- sband->n_bitrates)) {
- info->control.rates[i].idx = -1;
+ if (WARN_ON_ONCE(rc_rate->idx >= sband->n_bitrates)) {
+ rc_rate->idx = -1;
continue;
}
- rate = &sband->bitrates[info->control.rates[i].idx];
+ rate = &sband->bitrates[rc_rate->idx];
/* set up short preamble */
if (short_preamble &&
rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
- info->control.rates[i].flags |=
- IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
+ rc_rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
/* set up G protection */
if (!rts && tx->sdata->vif.bss_conf.use_cts_prot &&
rate->flags & IEEE80211_RATE_ERP_G)
- info->control.rates[i].flags |=
- IEEE80211_TX_RC_USE_CTS_PROTECT;
+ rc_rate->flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
}
return TX_CONTINUE;