X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fnet%2Fgianfar.c;h=83a5cb6aa23b1fc5c4426a9863303be6bb10dad3;hb=bdb59f949d663b7e943fb5f40b2557af4314abf9;hp=249541a1814b6823e98b079b6b0ae061723aa3bf;hpb=c132419e560a2ecd3c8cf77f9c37e103e74b3754;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 249541a1814..83a5cb6aa23 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -591,6 +591,14 @@ static void gfar_configure_serdes(struct net_device *dev)
 	if (bus)
 		mutex_lock(&bus->mdio_lock);
 
+	/* If the link is already up, we must already be ok, and don't need to
+	 * configure and reset the TBI<->SerDes link.  Maybe U-Boot configured
+	 * everything for us?  Resetting it takes the link down and requires
+	 * several seconds for it to come back.
+	 */
+	if (gfar_local_mdio_read(regs, tbipa, MII_BMSR) & BMSR_LSTATUS)
+		goto done;
+
 	/* Single clk mode, mii mode off(for serdes communication) */
 	gfar_local_mdio_write(regs, tbipa, MII_TBICON, TBICON_CLK_SELECT);
 
@@ -601,6 +609,7 @@ static void gfar_configure_serdes(struct net_device *dev)
 	gfar_local_mdio_write(regs, tbipa, MII_BMCR, BMCR_ANENABLE |
 			BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
 
+	done:
 	if (bus)
 		mutex_unlock(&bus->mdio_lock);
 }