1 files changed, 86 insertions, 0 deletions
diff --git a/package/mac80211/patches/467-ath5k_optimize_rx_status.patch b/package/mac80211/patches/467-ath5k_optimize_rx_status.patch
new file mode 100644
index 0000000000..b0ccb5fe48
--- /dev/null
+++ b/package/mac80211/patches/467-ath5k_optimize_rx_status.patch
@@ -0,0 +1,86 @@
+--- a/drivers/net/wireless/ath/ath5k/desc.c
++++ b/drivers/net/wireless/ath/ath5k/desc.c
+@@ -603,37 +603,37 @@ static int ath5k_hw_proc_5212_rx_status(
+ 					struct ath5k_rx_status *rs)
+ {
+ 	struct ath5k_hw_rx_status *rx_status;
++	u32 rxstat0, rxstat1;
+ 
+ 	rx_status = &desc->ud.ds_rx.rx_stat;
++	rxstat1 = ACCESS_ONCE(rx_status->rx_status_1);
+ 
+ 	/* No frame received / not ready */
+-	if (unlikely(!(rx_status->rx_status_1 &
+-				AR5K_5212_RX_DESC_STATUS1_DONE)))
++	if (unlikely(!(rxstat1 & AR5K_5212_RX_DESC_STATUS1_DONE)))
+ 		return -EINPROGRESS;
+ 
+ 	memset(rs, 0, sizeof(struct ath5k_rx_status));
++	rxstat0 = ACCESS_ONCE(rx_status->rx_status_0);
+ 
+ 	/*
+ 	 * Frame receive status
+ 	 */
+-	rs->rs_datalen = rx_status->rx_status_0 &
+-		AR5K_5212_RX_DESC_STATUS0_DATA_LEN;
+-	rs->rs_rssi = AR5K_REG_MS(rx_status->rx_status_0,
++	rs->rs_datalen = rxstat0 & AR5K_5212_RX_DESC_STATUS0_DATA_LEN;
++	rs->rs_rssi = AR5K_REG_MS(rxstat0,
+ 		AR5K_5212_RX_DESC_STATUS0_RECEIVE_SIGNAL);
+-	rs->rs_rate = AR5K_REG_MS(rx_status->rx_status_0,
++	rs->rs_rate = AR5K_REG_MS(rxstat0,
+ 		AR5K_5212_RX_DESC_STATUS0_RECEIVE_RATE);
+-	rs->rs_antenna = AR5K_REG_MS(rx_status->rx_status_0,
++	rs->rs_antenna = AR5K_REG_MS(rxstat0,
+ 		AR5K_5212_RX_DESC_STATUS0_RECEIVE_ANTENNA);
+-	rs->rs_more = !!(rx_status->rx_status_0 &
+-		AR5K_5212_RX_DESC_STATUS0_MORE);
+-	rs->rs_tstamp = AR5K_REG_MS(rx_status->rx_status_1,
++	rs->rs_more = !!(rxstat0 & AR5K_5212_RX_DESC_STATUS0_MORE);
++	rs->rs_tstamp = AR5K_REG_MS(rxstat1,
+ 		AR5K_5212_RX_DESC_STATUS1_RECEIVE_TIMESTAMP);
+ 
+ 	/*
+ 	 * Key table status
+ 	 */
+-	if (rx_status->rx_status_1 & AR5K_5212_RX_DESC_STATUS1_KEY_INDEX_VALID)
+-		rs->rs_keyix = AR5K_REG_MS(rx_status->rx_status_1,
++	if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_KEY_INDEX_VALID)
++		rs->rs_keyix = AR5K_REG_MS(rxstat1,
+ 					   AR5K_5212_RX_DESC_STATUS1_KEY_INDEX);
+ 	else
+ 		rs->rs_keyix = AR5K_RXKEYIX_INVALID;
+@@ -641,27 +641,22 @@ static int ath5k_hw_proc_5212_rx_status(
+ 	/*
+ 	 * Receive/descriptor errors
+ 	 */
+-	if (!(rx_status->rx_status_1 &
+-	    AR5K_5212_RX_DESC_STATUS1_FRAME_RECEIVE_OK)) {
+-		if (rx_status->rx_status_1 &
+-				AR5K_5212_RX_DESC_STATUS1_CRC_ERROR)
++	if (!(rxstat1 & AR5K_5212_RX_DESC_STATUS1_FRAME_RECEIVE_OK)) {
++		if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_CRC_ERROR)
+ 			rs->rs_status |= AR5K_RXERR_CRC;
+ 
+-		if (rx_status->rx_status_1 &
+-				AR5K_5212_RX_DESC_STATUS1_PHY_ERROR) {
++		if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_PHY_ERROR) {
+ 			rs->rs_status |= AR5K_RXERR_PHY;
+-			rs->rs_phyerr = AR5K_REG_MS(rx_status->rx_status_1,
++			rs->rs_phyerr = AR5K_REG_MS(rxstat1,
+ 				AR5K_5212_RX_DESC_STATUS1_PHY_ERROR_CODE);
+ 			if (!ah->ah_capabilities.cap_has_phyerr_counters)
+ 				ath5k_ani_phy_error_report(ah, rs->rs_phyerr);
+ 		}
+ 
+-		if (rx_status->rx_status_1 &
+-				AR5K_5212_RX_DESC_STATUS1_DECRYPT_CRC_ERROR)
++		if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_DECRYPT_CRC_ERROR)
+ 			rs->rs_status |= AR5K_RXERR_DECRYPT;
+ 
+-		if (rx_status->rx_status_1 &
+-				AR5K_5212_RX_DESC_STATUS1_MIC_ERROR)
++		if (rxstat1 & AR5K_5212_RX_DESC_STATUS1_MIC_ERROR)
+ 			rs->rs_status |= AR5K_RXERR_MIC;
+ 	}
+ 	return 0;