cxgb3 - remove false positive in xgmac workaround

Qualify toggling of xgmac tx enable with not getting pause frames,
we might not make forward progress because the peer is sending
lots of pause frames.

Signed-off-by: Divy Le Ray <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>

Author: Divy Le Ray

drivers/net/cxgb3/common.h

@@ -513,6 +513,7 @@ struct cmac {
 	u64 rx_mcnt;
 	unsigned int toggle_cnt;
 	unsigned int txen;
+	u64 rx_pause;
 	struct mac_stats stats;
 };
 

drivers/net/cxgb3/xgmac.c

@@ -452,6 +452,7 @@ int t3_mac_enable(struct cmac *mac, int which)
 						A_XGM_TX_SPI4_SOP_EOP_CNT +
 						oft)));
 		mac->rx_mcnt = s->rx_frames;
+		mac->rx_pause = s->rx_pause;
 		mac->rx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
 						A_XGM_RX_SPI4_SOP_EOP_CNT +
 						oft)));
@@ -504,7 +505,7 @@ int t3b2_mac_watchdog_task(struct cmac *mac)
 	tx_xcnt = 1;		/* By default tx_xcnt is making progress */
 	tx_tcnt = mac->tx_tcnt;	/* If tx_mcnt is progressing ignore tx_tcnt */
 	rx_xcnt = 1;		/* By default rx_xcnt is making progress */
-	if (tx_mcnt == mac->tx_mcnt) {
+	if (tx_mcnt == mac->tx_mcnt && mac->rx_pause == s->rx_pause) {
 		tx_xcnt = (G_TXSPI4SOPCNT(t3_read_reg(adap,
 						A_XGM_TX_SPI4_SOP_EOP_CNT +
 					       	mac->offset)));
@@ -560,6 +561,7 @@ int t3b2_mac_watchdog_task(struct cmac *mac)
 	mac->tx_mcnt = s->tx_frames;
 	mac->rx_xcnt = rx_xcnt;
 	mac->rx_mcnt = s->rx_frames;
+	mac->rx_pause = s->rx_pause;
 	if (status == 1) {
 		t3_write_reg(adap, A_XGM_TX_CTRL + mac->offset, 0);
 		t3_read_reg(adap, A_XGM_TX_CTRL + mac->offset);  /* flush */