mac80211: Check rate->idx before rate->count
The drivers are not required to fill in rate->count if rate->idx is set
to -1. Hence, we should first check rate->idx before accessing
rate->count.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index cdb2853..972244f 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -300,10 +300,10 @@
static bool
minstrel_ht_txstat_valid(struct ieee80211_tx_rate *rate)
{
- if (!rate->count)
+ if (rate->idx < 0)
return false;
- if (rate->idx < 0)
+ if (!rate->count)
return false;
return !!(rate->flags & IEEE80211_TX_RC_MCS);