From 1d0bb42d5eee20bd70f237d0a32cfe3b079849e2 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 25 May 2010 19:42:44 +0200
Subject: [PATCH] ath9k_hw: add multicast key search support
If a MAC address for a key table entry is flagged with the
multicast bit (0x01), indicate to the hardware that multicast
lookup instead of unicast lookup should be used. The multicast
bit itself never makes it to the actual keytable entry register,
as it is shifted out.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/ath/ath9k/hw.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index d902878faeed..df277e467b87 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1485,6 +1485,7 @@ EXPORT_SYMBOL(ath9k_hw_keyreset);
bool ath9k_hw_keysetmac(struct ath_hw *ah, u16 entry, const u8 *mac)
{
u32 macHi, macLo;
+ u32 unicast_flag = AR_KEYTABLE_VALID;
if (entry >= ah->caps.keycache_size) {
ath_print(ath9k_hw_common(ah), ATH_DBG_FATAL,
@@ -1493,6 +1494,16 @@ bool ath9k_hw_keysetmac(struct ath_hw *ah, u16 entry, const u8 *mac)
}
if (mac != NULL) {
+ /*
+ * AR_KEYTABLE_VALID indicates that the address is a unicast
+ * address, which must match the transmitter address for
+ * decrypting frames.
+ * Not setting this bit allows the hardware to use the key
+ * for multicast frame decryption.
+ */
+ if (mac[0] & 0x01)
+ unicast_flag = 0;
+
macHi = (mac[5] << 8) | mac[4];
macLo = (mac[3] << 24) |
(mac[2] << 16) |
@@ -1505,7 +1516,7 @@ bool ath9k_hw_keysetmac(struct ath_hw *ah, u16 entry, const u8 *mac)
macLo = macHi = 0;
}
REG_WRITE(ah, AR_KEYTABLE_MAC0(entry), macLo);
- REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), macHi | AR_KEYTABLE_VALID);
+ REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), macHi | unicast_flag);
return true;
}
--
2.20.1