1 files changed, 31 insertions, 6 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 81f4aedf534c..ef2f1fdd6f64 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -5806,6 +5806,13 @@ static int tg3_reset_hw(struct tg3 *tp)
         }
         memset(tp->hw_status, 0, TG3_HW_STATUS_SIZE);
 
+        if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES) {
+                tp->tg3_flags2 &= ~TG3_FLG2_PARALLEL_DETECT;
+                /* reset to prevent losing 1st rx packet intermittently */
+                tw32_f(MAC_RX_MODE, RX_MODE_RESET);
+                udelay(10);
+        }
+
         tp->mac_mode = MAC_MODE_TXSTAT_ENABLE | MAC_MODE_RXSTAT_ENABLE |
                 MAC_MODE_TDE_ENABLE | MAC_MODE_RDE_ENABLE | MAC_MODE_FHDE_ENABLE;
         tw32_f(MAC_MODE, tp->mac_mode | MAC_MODE_RXSTAT_CLEAR | MAC_MODE_TXSTAT_CLEAR);
@@ -5937,7 +5944,7 @@ static int tg3_reset_hw(struct tg3 *tp)
         tw32(MAC_LED_CTRL, tp->led_ctrl);
 
         tw32(MAC_MI_STAT, MAC_MI_STAT_LNKSTAT_ATTN_ENAB);
-        if (tp->tg3_flags2 & TG3_FLG2_ANY_SERDES) {
+        if (tp->tg3_flags2 & TG3_FLG2_PHY_SERDES) {
                 tw32_f(MAC_RX_MODE, RX_MODE_RESET);
                 udelay(10);
         }
@@ -7360,12 +7367,17 @@ static int tg3_nway_reset(struct net_device *dev)
         if (!netif_running(dev))
                 return -EAGAIN;
 
+        if (tp->tg3_flags2 & TG3_FLG2_PHY_SERDES)
+                return -EINVAL;
+
         spin_lock_bh(&tp->lock);
         r = -EINVAL;
         tg3_readphy(tp, MII_BMCR, &bmcr);
         if (!tg3_readphy(tp, MII_BMCR, &bmcr) &&
-            (bmcr & BMCR_ANENABLE)) {
-                tg3_writephy(tp, MII_BMCR, bmcr | BMCR_ANRESTART);
+            ((bmcr & BMCR_ANENABLE) ||
+             (tp->tg3_flags2 & TG3_FLG2_PARALLEL_DETECT))) {
+                tg3_writephy(tp, MII_BMCR, bmcr | BMCR_ANRESTART |
+                                           BMCR_ANENABLE);
                 r = 0;
         }
         spin_unlock_bh(&tp->lock);
@@ -7927,19 +7939,32 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
         struct tg3_rx_buffer_desc *desc;
 
         if (loopback_mode == TG3_MAC_LOOPBACK) {
+                /* HW errata - mac loopback fails in some cases on 5780.
+                 * Normal traffic and PHY loopback are not affected by
+                 * errata.
+                 */
+                if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780)
+                        return 0;
+
                 mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) |
                            MAC_MODE_PORT_INT_LPBACK | MAC_MODE_LINK_POLARITY |
                            MAC_MODE_PORT_MODE_GMII;
                 tw32(MAC_MODE, mac_mode);
         } else if (loopback_mode == TG3_PHY_LOOPBACK) {
+                tg3_writephy(tp, MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX |
+                                           BMCR_SPEED1000);
+                udelay(40);
+                /* reset to prevent losing 1st rx packet intermittently */
+                if (tp->tg3_flags2 & TG3_FLG2_MII_SERDES) {
+                        tw32_f(MAC_RX_MODE, RX_MODE_RESET);
+                        udelay(10);
+                        tw32_f(MAC_RX_MODE, tp->rx_mode);
+                }
                 mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) |
                            MAC_MODE_LINK_POLARITY | MAC_MODE_PORT_MODE_GMII;
                 if ((tp->phy_id & PHY_ID_MASK) == PHY_ID_BCM5401)
                         mac_mode &= ~MAC_MODE_LINK_POLARITY;
                 tw32(MAC_MODE, mac_mode);
-
-                tg3_writephy(tp, MII_BMCR, BMCR_LOOPBACK | BMCR_FULLDPLX |
-                                           BMCR_SPEED1000);
         }
         else
                 return -EINVAL;