From: Akinobu Mita <akinobu.mita@gmail.com>

acpiphp_glue_exit() needs to be called to unwind when no slots found.
(It fixes data corruption when reloading acpiphp driver with no such devices)

Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/pci/hotplug/acpiphp_core.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff -puN drivers/pci/hotplug/acpiphp_core.c~acpiphp-fix-missing-acpiphp_glue_exit drivers/pci/hotplug/acpiphp_core.c
--- a/drivers/pci/hotplug/acpiphp_core.c~acpiphp-fix-missing-acpiphp_glue_exit
+++ a/drivers/pci/hotplug/acpiphp_core.c
@@ -303,8 +303,10 @@ static int __init init_acpi(void)
 	/* read initial number of slots */
 	if (!retval) {
 		num_slots = acpiphp_get_num_slots();
-		if (num_slots == 0)
+		if (num_slots == 0) {
+			acpiphp_glue_exit();
 			retval = -ENODEV;
+		}
 	}
 
 	return retval;
_