From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 27 Jun 2012 01:10:18 +0000 (+0000)
Subject: ath9k: reject invalid antenna mask configurations
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3d83a7b636ec50a1d98b083ee756b505f8a21c2b;p=openwrt%2Fstaging%2Fflorian.git

ath9k: reject invalid antenna mask configurations

SVN-Revision: 32507
---

diff --git a/package/mac80211/patches/561-ath9k_antenna_mask_validate.patch b/package/mac80211/patches/561-ath9k_antenna_mask_validate.patch
new file mode 100644
index 0000000000..c84162fe44
--- /dev/null
+++ b/package/mac80211/patches/561-ath9k_antenna_mask_validate.patch
@@ -0,0 +1,28 @@
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -1929,12 +1929,24 @@ static u32 fill_chainmask(u32 cap, u32 n
+ 	return filled;
+ }
+ 
++static bool validate_antenna_mask(u32 val)
++{
++	switch (val & 0x7) {
++	case 0x1:
++	case 0x3:
++	case 0x7:
++		return true;
++	default:
++		return false;
++	}
++}
++
+ static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
+ {
+ 	struct ath_softc *sc = hw->priv;
+ 	struct ath_hw *ah = sc->sc_ah;
+ 
+-	if (!rx_ant || !tx_ant)
++	if (!validate_antenna_mask(rx_ant) || !validate_antenna_mask(tx_ant))
+ 		return -EINVAL;
+ 
+ 	sc->ant_rx = rx_ant;