ixgbe/base: power down the X550em PHY on overtemp event

This patch powers down the x550em PHY on over-temp events. The
PHY firmware is supposed to do this autonomously but that isn't
implemented. The short-term stop-gap solution is for SW to power
down the PHY when it reports an overtemp event.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>

diff --git a/drivers/net/ixgbe/base/ixgbe_x550.c b/drivers/net/ixgbe/base/ixgbe_x550.c
index 2b60d45..3a4d725 100644 (file)
--- a/drivers/net/ixgbe/base/ixgbe_x550.c
+++ b/drivers/net/ixgbe/base/ixgbe_x550.c
@@ -1193,8 +1193,11 @@ STATIC s32 ixgbe_get_lasi_ext_t_x550em(struct ixgbe_hw *hw, bool *lsc)
                return status;
 
        /* If high temperature failure, then return over temp error and exit */
-       if (reg & IXGBE_MDIO_GLOBAL_ALM_1_HI_TMP_FAIL)
+       if (reg & IXGBE_MDIO_GLOBAL_ALM_1_HI_TMP_FAIL) {
+               /* power down the PHY in case the PHY FW didn't already */
+               ixgbe_set_copper_phy_power(hw, false);
                return IXGBE_ERR_OVERTEMP;
+       }
 
        /* Vendor alarm 2 triggered */
        status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_GLOBAL_CHIP_STD_INT_FLAG,