[IA64] Check return from device_register() in cx_device_register()

The device_register() is declared with must_check, causing this:

arch/ia64/sn/kernel/tiocx.c: In function 'cx_device_register':
arch/ia64/sn/kernel/tiocx.c:210:17: warning: ignoring return value of 'device_register', declared with attribute warn_unused_result

Check the return value, and free resources if it fails.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index c1bd1cfda32..2f406f509d4 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -191,6 +191,7 @@ cx_device_register(nasid_t nasid, int part_num, int mfg_num,
                    struct hubdev_info *hubdev, int bt)
 {
         struct cx_dev *cx_dev;
+        int r;
 
         cx_dev = kzalloc(sizeof(struct cx_dev), GFP_KERNEL);
         DBG("cx_dev= 0x%p\n", cx_dev);
@@ -207,7 +208,11 @@ cx_device_register(nasid_t nasid, int part_num, int mfg_num,
         cx_dev->dev.bus = &tiocx_bus_type;
         cx_dev->dev.release = tiocx_bus_release;
         dev_set_name(&cx_dev->dev, "%d", cx_dev->cx_id.nasid);
-        device_register(&cx_dev->dev);
+        r = device_register(&cx_dev->dev);
+        if (r) {
+                kfree(cx_dev);
+                return r;
+        }
         get_device(&cx_dev->dev);
 
         device_create_file(&cx_dev->dev, &dev_attr_cxdev_control);