From: Bruce Allan Date: Wed, 1 Jul 2009 13:27:31 +0000 (+0000) Subject: e1000e: PHY loopback broken on 82578 X-Git-Tag: v2.6.31-rc3~40^2~29 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e65fa87c225fadd1980068b7d360e08ac0e985dd;p=platform%2Fupstream%2Fkernel-adaptation-pc.git e1000e: PHY loopback broken on 82578 PHY loopback on 82578 fails to work as a result of flushing the packets in the FIFO buffer in the link stall workaround. Don't perform the workaround if in PHY loopback mode. Signed-off-by: Bruce Allan Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- diff --git a/drivers/net/e1000e/defines.h b/drivers/net/e1000e/defines.h index 8890c97..4329ec3 100644 --- a/drivers/net/e1000e/defines.h +++ b/drivers/net/e1000e/defines.h @@ -575,6 +575,8 @@ #define PHY_1000T_STATUS 0x0A /* 1000Base-T Status Reg */ #define PHY_EXT_STATUS 0x0F /* Extended Status Reg */ +#define PHY_CONTROL_LB 0x4000 /* PHY Loopback bit */ + /* NVM Control */ #define E1000_EECD_SK 0x00000001 /* NVM Clock */ #define E1000_EECD_CS 0x00000002 /* NVM Chip Select */ diff --git a/drivers/net/e1000e/phy.c b/drivers/net/e1000e/phy.c index e23459c..d845394 100644 --- a/drivers/net/e1000e/phy.c +++ b/drivers/net/e1000e/phy.c @@ -2737,6 +2737,11 @@ s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw) if (hw->phy.type != e1000_phy_82578) goto out; + /* Do not apply workaround if in PHY loopback bit 14 set */ + hw->phy.ops.read_phy_reg(hw, PHY_CONTROL, &data); + if (data & PHY_CONTROL_LB) + goto out; + /* check if link is up and at 1Gbps */ ret_val = hw->phy.ops.read_phy_reg(hw, BM_CS_STATUS, &data); if (ret_val)