carl9170: remove stale rx error path

The total/fatal error bit was erroneously prefixed
with AR9170_RX_ERROR instead of AR9170_RX_STATUS.
Luckily, the hardware specification confirmed that
the 0x80 flag will never be set for mac->error.
So, it was always just a dead branch.

This patch also imports the latest version of
shared wlan.h header from the firmware git.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/carl9170/rx.c

@@ -604,9 +604,6 @@ static void carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len)
 	mpdu_len = len - sizeof(*mac);
 
 	mac = (void *)(buf + mpdu_len);
-	if (unlikely(mac->error & AR9170_RX_ERROR_FATAL))
-		goto drop;
-
 	switch (mac->status & AR9170_RX_STATUS_MPDU) {
 	case AR9170_RX_STATUS_MPDU_FIRST:
 		/* Aggregated MPDUs start with an PLCP header */

drivers/net/wireless/ath/carl9170/wlan.h

@@ -74,6 +74,9 @@
 #define	AR9170_RX_STATUS_MPDU_MIDDLE		0x30
 #define	AR9170_RX_STATUS_MPDU_LAST		0x10
 
+#define	AR9170_RX_STATUS_CONT_AGGR		0x40
+#define	AR9170_RX_STATUS_TOTAL_ERROR		0x80
+
 #define	AR9170_RX_ERROR_RXTO			0x01
 #define	AR9170_RX_ERROR_OVERRUN			0x02
 #define	AR9170_RX_ERROR_DECRYPT			0x04
@@ -81,7 +84,6 @@
 #define	AR9170_RX_ERROR_WRONG_RA		0x10
 #define	AR9170_RX_ERROR_PLCP			0x20
 #define	AR9170_RX_ERROR_MMIC			0x40
-#define	AR9170_RX_ERROR_FATAL			0x80
 
 /* these are either-or */
 #define	AR9170_TX_MAC_PROT_RTS			0x0001
@@ -329,13 +331,15 @@ struct _carl9170_tx_superframe {
 
 #define	CARL9170_TX_SUPERDESC_LEN		24
 #define	AR9170_TX_HWDESC_LEN			8
-#define	AR9170_TX_SUPERFRAME_LEN		(CARL9170_TX_HWDESC_LEN + \
-						 AR9170_TX_SUPERDESC_LEN)
+#define	CARL9170_TX_SUPERFRAME_LEN		(CARL9170_TX_SUPERDESC_LEN + \
+						 AR9170_TX_HWDESC_LEN)
 
 struct ar9170_rx_head {
 	u8 plcp[12];
 } __packed;
 
+#define	AR9170_RX_HEAD_LEN			12
+
 struct ar9170_rx_phystatus {
 	union {
 		struct {
@@ -350,12 +354,16 @@ struct ar9170_rx_phystatus {
 	u8 phy_err;
 } __packed;
 
+#define	AR9170_RX_PHYSTATUS_LEN			20
+
 struct ar9170_rx_macstatus {
 	u8 SAidx, DAidx;
 	u8 error;
 	u8 status;
 } __packed;
 
+#define	AR9170_RX_MACSTATUS_LEN			4
+
 struct ar9170_rx_frame_single {
 	struct ar9170_rx_head phy_head;
 	struct ieee80211_hdr i3e;