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Diffstat (limited to 'drivers/net/wireless/ath/carl9170/mac.c')
-rw-r--r--drivers/net/wireless/ath/carl9170/mac.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/carl9170/mac.c b/drivers/net/wireless/ath/carl9170/mac.c
index e3b1b6e87760..24d75ab94f0d 100644
--- a/drivers/net/wireless/ath/carl9170/mac.c
+++ b/drivers/net/wireless/ath/carl9170/mac.c
@@ -343,7 +343,24 @@ int carl9170_set_operating_mode(struct ar9170 *ar)
break;
}
} else {
- mac_addr = NULL;
+ /*
+ * Enable monitor mode
+ *
+ * rx_ctrl |= AR9170_MAC_RX_CTRL_ACK_IN_SNIFFER;
+ * sniffer |= AR9170_MAC_SNIFFER_ENABLE_PROMISC;
+ *
+ * When the hardware is in SNIFFER_PROMISC mode,
+ * it generates spurious ACKs for every incoming
+ * frame. This confuses every peer in the
+ * vicinity and the network throughput will suffer
+ * badly.
+ *
+ * Hence, the hardware will be put into station
+ * mode and just the rx filters are disabled.
+ */
+ cam_mode |= AR9170_MAC_CAM_STA;
+ rx_ctrl |= AR9170_MAC_RX_CTRL_PASS_TO_HOST;
+ mac_addr = common->macaddr;
bssid = NULL;
}
rcu_read_unlock();
@@ -355,8 +372,6 @@ int carl9170_set_operating_mode(struct ar9170 *ar)
enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE;
if (ar->sniffer_enabled) {
- rx_ctrl |= AR9170_MAC_RX_CTRL_ACK_IN_SNIFFER;
- sniffer |= AR9170_MAC_SNIFFER_ENABLE_PROMISC;
enc_mode |= AR9170_MAC_ENCRYPTION_RX_SOFTWARE;
}