PCIE: fix PCIe Hotplug so that it works with ExpressCard slots on Dell notebooks (and others?) in conjunction with modparam of pciehp_force=1.

Fix pciehp_probe() to deal with ExpressCard cards
that were inserted prior to the driver being loaded.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 6 insertions, 1 deletions

diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index 7959c222dc24..968f57087ce0 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -161,6 +161,7 @@ extern int pciehp_configure_device(struct slot *p_slot);
 extern int pciehp_unconfigure_device(struct slot *p_slot);
 extern void pciehp_queue_pushbutton_work(struct work_struct *work);
 int pcie_init(struct controller *ctrl, struct pcie_device *dev);
+int pciehp_enable_slot(struct slot *p_slot);
 
 static inline struct slot *pciehp_find_slot(struct controller *ctrl, u8 device)
 {
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 6462ac3b405f..74f4f7bc8db9 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -471,6 +471,11 @@ static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_
         t_slot = pciehp_find_slot(ctrl, ctrl->slot_device_offset);
 
         t_slot->hpc_ops->get_adapter_status(t_slot, &value); /* Check if slot is occupied */
+        if (value) {
+                rc = pciehp_enable_slot(t_slot);
+                if (rc) /* -ENODEV: shouldn't happen, but deal with it */
+                        value = 0;
+        }
         if ((POWER_CTRL(ctrl->ctrlcap)) && !value) {
                 rc = t_slot->hpc_ops->power_off_slot(t_slot); /* Power off slot if not occupied*/
                 if (rc)
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index f1e0966cee95..342cfc6c1de8 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -37,7 +37,6 @@
 #include "pciehp.h"
 
 static void interrupt_event_handler(struct work_struct *work);
-static int pciehp_enable_slot(struct slot *p_slot);
 static int pciehp_disable_slot(struct slot *p_slot);
 
 static int queue_interrupt_event(struct slot *p_slot, u32 event_type)