tg3: Update link_up flag for phylib devices

commit 84421b99cedc3443e76d2a594f3c815d5cb9a8e1 upstream.

Commit f4a46d1f46a8fece34edd2023e054072b02e110d introduced a bug where
the ifconfig stats would remain 0 for phylib devices. This is due to
tp->link_up flag never becoming true causing tg3_periodic_fetch_stats()
to return.

The link_up flag was being updated in tg3_test_and_report_link_chg()
after setting up the phy. This function however, is not called for
phylib devices since the driver does not do the phy setup.

This patch moves the link_up flag update into the common
tg3_link_report() function that gets called for phylib devices as well
for non phylib devices when the link state changes.

To avoid updating link_up twice, we replace tg3_carrier_...() calls that
are followed by tg3_link_report(), with netif_carrier_...(). We can then
remove the unused tg3_carrier_on() function.

Reported-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Nithin Nayak Sujir <nsujir@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index bdb0869..f0b38fa 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -1843,6 +1843,8 @@ static void tg3_link_report(struct tg3 *tp)
 
                tg3_ump_link_report(tp);
        }
+
+       tp->link_up = netif_carrier_ok(tp->dev);
 }
 
 static u16 tg3_advert_flowctrl_1000X(u8 flow_ctrl)
@@ -2496,12 +2498,6 @@ static int tg3_phy_reset_5703_4_5(struct tg3 *tp)
        return err;
 }
 
-static void tg3_carrier_on(struct tg3 *tp)
-{
-       netif_carrier_on(tp->dev);
-       tp->link_up = true;
-}
-
 static void tg3_carrier_off(struct tg3 *tp)
 {
        netif_carrier_off(tp->dev);
@@ -2527,7 +2523,7 @@ static int tg3_phy_reset(struct tg3 *tp)
                return -EBUSY;
 
        if (netif_running(tp->dev) && tp->link_up) {
-               tg3_carrier_off(tp);
+               netif_carrier_off(tp->dev);
                tg3_link_report(tp);
        }
 
@@ -4225,9 +4221,9 @@ static bool tg3_test_and_report_link_chg(struct tg3 *tp, int curr_link_up)
 {
        if (curr_link_up != tp->link_up) {
                if (curr_link_up) {
-                       tg3_carrier_on(tp);
+                       netif_carrier_on(tp->dev);
                } else {
-                       tg3_carrier_off(tp);
+                       netif_carrier_off(tp->dev);
                        if (tp->phy_flags & TG3_PHYFLG_MII_SERDES)
                                tp->phy_flags &= ~TG3_PHYFLG_PARALLEL_DETECT;
                }