Merge branch 'master' of git+ssh://git.samba.org/data/git/sfrench/cifs-2.6

[karo-tx-linux.git] / drivers / pci / hotplug / pciehp_hpc.c

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 96dc4734e4affcc6c7f763a9853342678df8a7c6..7b1414810ae3e0e0a5ccbcd9bec0f21051cf95db 100644 (file)
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -280,6 +280,14 @@ int pciehp_check_link_status(struct controller *ctrl)
         else
                 msleep(1000);
 
+       /*
+        * Need to wait for 1000 ms after Data Link Layer Link Active
+        * (DLLLA) bit reads 1b before sending configuration request.
+        * We need it before checking Link Training (LT) bit becuase
+        * LT is still set even after DLLLA bit is set on some platform.
+        */
+       msleep(1000);
+
        retval = pciehp_readw(ctrl, PCI_EXP_LNKSTA, &lnk_status);
        if (retval) {
                ctrl_err(ctrl, "Cannot read LNKSTATUS register\n");
@@ -294,6 +302,16 @@ int pciehp_check_link_status(struct controller *ctrl)
                return retval;
        }
 
+       /*
+        * If the port supports Link speeds greater than 5.0 GT/s, we
+        * must wait for 100 ms after Link training completes before
+        * sending configuration request.
+        */
+       if (ctrl->pcie->port->subordinate->max_bus_speed > PCIE_SPEED_5_0GT)
+               msleep(100);
+
+       pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
+
        return retval;
 }
 
@@ -484,7 +502,6 @@ 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 +533,6 @@ 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;
 }