[PATCH] PCI Hotplug: fix CPCI reference counting bug

Here's a patch that fixes up the pci_dev refcounting in the CPCI code.
I've done some testing against it and it seems fine here.

Signed-off-by: Scott Murray <scottm@somanetworks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/pci/hotplug/cpci_hotplug_core.c b/drivers/pci/hotplug/cpci_hotplug_core.c
index 8132d94..30af105 100644 (file)
--- a/drivers/pci/hotplug/cpci_hotplug_core.c
+++ b/drivers/pci/hotplug/cpci_hotplug_core.c
@@ -217,6 +217,8 @@ static void release_slot(struct hotplug_slot *hotplug_slot)
        kfree(slot->hotplug_slot->info);
        kfree(slot->hotplug_slot->name);
        kfree(slot->hotplug_slot);
+       if (slot->dev)
+               pci_dev_put(slot->dev);
        kfree(slot);
 }
 

diff --git a/drivers/pci/hotplug/cpci_hotplug_pci.c b/drivers/pci/hotplug/cpci_hotplug_pci.c
index c878028..225b5e5 100644 (file)
--- a/drivers/pci/hotplug/cpci_hotplug_pci.c
+++ b/drivers/pci/hotplug/cpci_hotplug_pci.c
@@ -315,9 +315,12 @@ int cpci_unconfigure_slot(struct slot* slot)
                                    PCI_DEVFN(PCI_SLOT(slot->devfn), i));
                if (dev) {
                        pci_remove_bus_device(dev);
-                       slot->dev = NULL;
+                       pci_dev_put(dev);
                }
        }
+       pci_dev_put(slot->dev);
+       slot->dev = NULL;
+
        dbg("%s - exit", __FUNCTION__);
        return 0;
 }