cxgb3: Fix T3C MAC max packet size access

Max packet size is not the only field in T3C's High Water Mark register.
Mask the register to access this field.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/net/cxgb3/xgmac.c b/drivers/net/cxgb3/xgmac.c
index f87f9435049f..0109ee4f2f91 100644
--- a/drivers/net/cxgb3/xgmac.c
+++ b/drivers/net/cxgb3/xgmac.c
@@ -447,11 +447,12 @@ int t3_mac_set_speed_duplex_fc(struct cmac *mac, int speed, int duplex, int fc)
 
         val = t3_read_reg(adap, A_XGM_RXFIFO_CFG + oft);
         val &= ~V_RXFIFOPAUSEHWM(M_RXFIFOPAUSEHWM);
-        if (fc & PAUSE_TX)
-                val |= V_RXFIFOPAUSEHWM(rx_fifo_hwm(
-                                                t3_read_reg(adap,
-                                                A_XGM_RX_MAX_PKT_SIZE
-                                                + oft)) / 8);
+        if (fc & PAUSE_TX) {
+                u32 rx_max_pkt_size =
+                    G_RXMAXPKTSIZE(t3_read_reg(adap,
+                                               A_XGM_RX_MAX_PKT_SIZE + oft));
+                val |= V_RXFIFOPAUSEHWM(rx_fifo_hwm(rx_max_pkt_size) / 8);
+        }
         t3_write_reg(adap, A_XGM_RXFIFO_CFG + oft, val);
 
         t3_set_reg_field(adap, A_XGM_TX_CFG + oft, F_TXPAUSEEN,