From 8cfb3373a29e05974763456961da278706a04cad Mon Sep 17 00:00:00 2001 From: Nithin Sujir Date: Tue, 12 Mar 2013 15:32:48 +0000 Subject: [PATCH] tg3: 5715 does not link up when autoneg off Commit 5b39433582cf945bb2800e0c8329edd13a2d8d35 ("tg3: Remove SPEED_UNKNOWN checks") cleaned up the autoneg advertisement by removing some dead code. One effect of this change was that the advertisement register would not be updated if autoneg is turned off. This exposed a bug on the 5715 device w.r.t linking. The 5715 defaults to advertise only 10Mb Full duplex. But with autoneg disabled, it needs the configured speed enabled in the advertisement register to link up. This patch adds the work around to advertise all speeds on the 5715 when autoneg is disabled. Reported-by: Marcin Miotk Reviewed-by: Benjamin Li Signed-off-by: Nithin Nayak Sujir Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/tg3.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 93729f9423588..67d2663b3974a 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -4130,6 +4130,14 @@ static void tg3_phy_copper_begin(struct tg3 *tp) tp->link_config.active_speed = tp->link_config.speed; tp->link_config.active_duplex = tp->link_config.duplex; + if (tg3_asic_rev(tp) == ASIC_REV_5714) { + /* With autoneg disabled, 5715 only links up when the + * advertisement register has the configured speed + * enabled. + */ + tg3_writephy(tp, MII_ADVERTISE, ADVERTISE_ALL); + } + bmcr = 0; switch (tp->link_config.speed) { default: -- 2.39.5