[PATCH] shpchp: fix oops at driver unload

At unload time, the shpchp driver does not remove sysfs files
it had created in the driver's probe entry point. This patch
fixes this problem.

Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/hotplug/shpchp.h

@@ -173,6 +173,7 @@ extern void	get_hp_params_from_firmware(struct pci_dev *dev,
 		struct hotplug_params *hpp);
 extern int	shpchprm_get_physical_slot_number(struct controller *ctrl,
 		u32 *sun, u8 busnum, u8 devnum);
+extern void	shpchp_remove_ctrl_files(struct controller *ctrl);
 
 
 /* Global variables */

drivers/pci/hotplug/shpchp_core.c

@@ -480,6 +480,7 @@ static void __exit unload_shpchpd(void)
 	ctrl = shpchp_ctrl_list;
 
 	while (ctrl) {
+		shpchp_remove_ctrl_files(ctrl);
 		cleanup_slots(ctrl);
 
 		kfree (ctrl->pci_bus);

drivers/pci/hotplug/shpchp_sysfs.c

@@ -89,3 +89,8 @@ void shpchp_create_ctrl_files (struct controller *ctrl)
 {
 	device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
 }
+
+void shpchp_remove_ctrl_files(struct controller *ctrl)
+{
+	device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
+}