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ixgbe/base: restore advertised autoneg after setting X550em LPLU

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On systems that support LPLU in the firmware, the driver wouldn't be
aware of the LPLU speed change, and it wouldn't cache the new value when
the driver resumes. This patch emulates the same behavior by restoring
the previous autoneg settings to autoneg_advertised.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
This commit is contained in:
Wenzhuo Lu 2015-06-24 11:25:59 +08:00 committed by Thomas Monjalon
parent bc07947332
commit 10f1868bac
1 changed files with 6 additions and 0 deletions
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6
drivers/net/ixgbe/base/ixgbe_x550.c
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@ -2481,6 +2481,7 @@ s32 ixgbe_enter_lplu_t_x550em(struct ixgbe_hw *hw)
u16 autoneg_status, an_10g_cntl_reg, autoneg_reg, speed;
s32 status;
ixgbe_link_speed lcd_speed;
u32 save_autoneg;
/* If blocked by MNG FW, then don't restart AN */
if (ixgbe_check_reset_blocked(hw))
@ -2556,9 +2557,14 @@ s32 ixgbe_enter_lplu_t_x550em(struct ixgbe_hw *hw)
if (status != IXGBE_SUCCESS)
return status;
save_autoneg = hw->phy.autoneg_advertised;
/* Setup link at least common link speed */
status = hw->mac.ops.setup_link(hw, lcd_speed, false);
/* restore autoneg from before setting lplu speed */
hw->phy.autoneg_advertised = save_autoneg;
return status;
}