tiocx: check retval from bus_register()

Properly check return value from bus_register() and propagate it out of
tiocx_init() in case of failure.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index 14c1711238c0..e35f6485c1fd 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -490,11 +490,14 @@ static int __init tiocx_init(void)
 {
         cnodeid_t cnodeid;
         int found_tiocx_device = 0;
+        int err;
 
         if (!ia64_platform_is("sn2"))
                 return 0;
 
-        bus_register(&tiocx_bus_type);
+        err = bus_register(&tiocx_bus_type);
+        if (err)
+                return err;
 
         for (cnodeid = 0; cnodeid < num_cnodes; cnodeid++) {
                 nasid_t nasid;