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Date: Wed, 22 Feb 2012 14:35:18 -0800 From: "Matt Carlson" <mcarlson@...adcom.com> To: davem@...emloft.net cc: netdev@...r.kernel.org, mcarlson@...adcom.com, mchan@...adcom.com Subject: [PATCH net-next 1/4] tg3: Fix link check in tg3_adjust_link The tg3 driver tried to detect link changes by comparing the tg3 local active_speed member with SPEED_UNKNOWN (or formerly SPEED_INVALID). This check is not correct, since phylib will never set its speed member to either of these two values. The code only appeared to work because tg3 initializes active_speed to SPEED_INVALID during tg3_init_one. This patch introduces a new "old_link" tg3 member and then compares the phy_device's link member against it to detect link state changes. Signed-off-by: Matt Carlson <mcarlson@...adcom.com> --- drivers/net/ethernet/broadcom/tg3.c | 6 ++++-- drivers/net/ethernet/broadcom/tg3.h | 1 + 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index d604664..c56523e 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -1819,13 +1819,13 @@ static void tg3_adjust_link(struct net_device *dev) (6 << TX_LENGTHS_IPG_SHIFT) | (32 << TX_LENGTHS_SLOT_TIME_SHIFT))); - if ((phydev->link && tp->link_config.active_speed == SPEED_UNKNOWN) || - (!phydev->link && tp->link_config.active_speed != SPEED_UNKNOWN) || + if (phydev->link != tp->old_link || phydev->speed != tp->link_config.active_speed || phydev->duplex != tp->link_config.active_duplex || oldflowctrl != tp->link_config.active_flowctrl) linkmesg = 1; + tp->old_link = phydev->link; tp->link_config.active_speed = phydev->speed; tp->link_config.active_duplex = phydev->duplex; @@ -13352,6 +13352,8 @@ static void __devinit tg3_phy_init_link_config(struct tg3 *tp) tp->link_config.autoneg = AUTONEG_ENABLE; tp->link_config.active_speed = SPEED_UNKNOWN; tp->link_config.active_duplex = DUPLEX_UNKNOWN; + + tp->old_link = -1; } static int __devinit tg3_phy_probe(struct tg3 *tp) diff --git a/drivers/net/ethernet/broadcom/tg3.h b/drivers/net/ethernet/broadcom/tg3.h index 22cbe74..66bcfca 100644 --- a/drivers/net/ethernet/broadcom/tg3.h +++ b/drivers/net/ethernet/broadcom/tg3.h @@ -3064,6 +3064,7 @@ struct tg3 { struct mii_bus *mdio_bus; int mdio_irq[PHY_MAX_ADDR]; + int old_link; u8 phy_addr; -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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