net: phy: Increase link up delay in genphy_update_link()

I've noticed that in most cases when genphy_update_link() is called, the
ethernet driver (mt7628-eth in this case) fails with the first ethernet
packets. Resulting in a timeout of the first tftp command. Increasing
the delay in the link check look from 1 to 50 ms and moving it below the
BMSR register read fixes this issue, resulting in a stable ethernet
traffic, even after initial link autonogotiation.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Weijie Gao <weijie.gao@mediatek.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 6be0709..80a7664 100644 (file)
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -256,11 +256,11 @@ int genphy_update_link(struct phy_device *phydev)
                                return -EINTR;
                        }
 
-                       if ((i++ % 500) == 0)
+                       if ((i++ % 10) == 0)
                                printf(".");
 
-                       udelay(1000);   /* 1 ms */
                        mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
+                       mdelay(50);     /* 50 ms */
                }
                printf(" done\n");
                phydev->link = 1;