From: Nithin Sujir <nsujir@xxxxxxxxxxxx>
Hi Greg,
Please consider this patch for the stable 3.4.y and 3.8.y trees.
Upstream commit id: 7c6cdead7cc9a99650d15497aae47d7472217eb1
The upstream patch has been modified to compile on 3.4 and 3.8.
Specifically tg3_asic_rev() has been changed to GET_ASIC_REV().
=========================
Commit d13ba512cbba7de5d55d7a3b2aae7d83c8921457 ("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 <marcinmiotk81@xxxxxxxxx>
Reviewed-by: Benjamin Li <benli@xxxxxxxxxxxx>
Signed-off-by: Nithin Nayak Sujir <nsujir@xxxxxxxxxxxx>
Signed-off-by: Michael Chan <mchan@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
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 bdb0869..054e5ee 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -4097,6 +4097,14 @@ 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 (GET_ASIC_REV(tp->pci_chip_rev_id) == 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:
--
1.8.1.4
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