ixgbe: fix issues with failing to detect insert of unsupported module

Several small fixes around negative test case of the insertion of a
IXGBE_ERR_NOT_SUPPORTED module.

- mdio45_probe call was always failing due to mdio.prtad not being
set.  The function set to mdio.mdio_read was still working as we just
happen to always be at prtad == 0.  This will allow us to set the phy_id
and phy.type correctly now.

- There was timing issue with i2c calls when initiated from a tasklet.
A small delay was added to allow the electrical oscillation to calm down.

- Logic change in ixgbe_sfp_task that allows NOT_SUPPORTED condition
to be recognized.

Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 5588ef4..aaf482c 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3724,7 +3724,7 @@ static void ixgbe_sfp_task(struct work_struct *work)
        if ((hw->phy.type == ixgbe_phy_nl) &&
            (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
                s32 ret = hw->phy.ops.identify_sfp(hw);
-               if (ret)
+               if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
                        goto reschedule;
                ret = hw->phy.ops.reset(hw);
                if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
@@ -4534,13 +4534,17 @@ static void ixgbe_sfp_config_module_task(struct work_struct *work)
        u32 err;
 
        adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
+
+       /* Time for electrical oscillations to settle down */
+       msleep(100);
        err = hw->phy.ops.identify_sfp(hw);
+
        if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
                dev_err(&adapter->pdev->dev, "failed to initialize because "
                        "an unsupported SFP+ module type was detected.\n"
                        "Reload the driver after installing a supported "
                        "module.\n");
-               ixgbe_down(adapter);
+               unregister_netdev(adapter->netdev);
                return;
        }
        hw->mac.ops.setup_sfp(hw);

diff --git a/drivers/net/ixgbe/ixgbe_phy.c b/drivers/net/ixgbe/ixgbe_phy.c
index 453e966..9ecad17 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ixgbe/ixgbe_phy.c
@@ -60,6 +60,7 @@ s32 ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
 
        if (hw->phy.type == ixgbe_phy_unknown) {
                for (phy_addr = 0; phy_addr < IXGBE_MAX_PHY_ADDR; phy_addr++) {
+                       hw->phy.mdio.prtad = phy_addr;
                        if (mdio45_probe(&hw->phy.mdio, phy_addr) == 0) {
                                ixgbe_get_phy_id(hw);
                                hw->phy.type =
@@ -68,6 +69,8 @@ s32 ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
                                break;
                        }
                }
+               /* clear value if nothing found */
+               hw->phy.mdio.prtad = 0;
        } else {
                status = 0;
        }