PCI: ZT5550 CPCI Hotplug driver fix

cc: Philip Guo <pg@cs.stanford.edu>

Here's a small patch against the current git tree for the ZT5550 CPCI 
hotplug driver to fix an issue with port freeing that Philip Guo found.

Signed-off-by: Scott Murray <scottm@somanetworks.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/pci/hotplug/cpcihp_zt5550.c b/drivers/pci/hotplug/cpcihp_zt5550.c
index 1c12e9171097..41f6a8d79c81 100644
--- a/drivers/pci/hotplug/cpcihp_zt5550.c
+++ b/drivers/pci/hotplug/cpcihp_zt5550.c
@@ -296,13 +296,17 @@ static struct pci_driver zt5550_hc_driver = {
 static int __init zt5550_init(void)
 {
         struct resource* r;
+        int rc;
 
         info(DRIVER_DESC " version: " DRIVER_VERSION);
         r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register");
         if(!r)
                 return -EBUSY;
 
-        return pci_register_driver(&zt5550_hc_driver);
+        rc = pci_register_driver(&zt5550_hc_driver);
+        if(rc < 0)
+                release_region(ENUM_PORT, 1);
+        return rc;
 }
 
 static void __exit