PCI: pciehp: Retrieve link speed after link is trained

During hot plug, board_added will call pciehp_power_on_slot().
But link speed is updated in pciehp_power_on_slot().

We should not update link speed there, because that is too early.

So move the link speed update to pciehp_check_link_status() after making
sure the link has been trained.

-v2: fix compile warning that Kenji found.

Signed-off-by: Yinghai Lu <yinghai.lu@oracle.com>
Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 2 insertions, 9 deletions

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 96dc4734e4af..6692832c9c81 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -294,6 +294,8 @@ int pciehp_check_link_status(struct controller *ctrl)
                 return retval;
         }
 
+        pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
+
         return retval;
 }
 
@@ -484,7 +486,6 @@ int pciehp_power_on_slot(struct slot * slot)
         u16 slot_cmd;
         u16 cmd_mask;
         u16 slot_status;
-        u16 lnk_status;
         int retval = 0;
 
         /* Clear sticky power-fault bit from previous power failures */
@@ -516,14 +517,6 @@ int pciehp_power_on_slot(struct slot * slot)
         ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__,
                  pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd);
 
-        retval = pciehp_readw(ctrl, PCI_EXP_LNKSTA, &lnk_status);
-        if (retval) {
-                ctrl_err(ctrl, "%s: Cannot read LNKSTA register\n",
-                                __func__);
-                return retval;
-        }
-        pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
-
         return retval;
 }