xen/mce: fix up xen_late_init_mcelog() error handling
Static checkers complain about the missing call to misc_deregister() if
bind_virq_for_mce() fails.
Also I reversed the tests so that we do error handling instead of
success handling. That way we just have a series of function calls
instead of the more complicated nested if statements in the original
code. Let's preserve the error codes as well.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
diff --git a/drivers/xen/mcelog.c b/drivers/xen/mcelog.c
index 6ab6a79..a493c7315 100644
--- a/drivers/xen/mcelog.c
+++ b/drivers/xen/mcelog.c
@@ -393,14 +393,25 @@
static int __init xen_late_init_mcelog(void)
{
- /* Only DOM0 is responsible for MCE logging */
- if (xen_initial_domain()) {
- /* register character device /dev/mcelog for xen mcelog */
- if (misc_register(&xen_mce_chrdev_device))
- return -ENODEV;
- return bind_virq_for_mce();
- }
+ int ret;
- return -ENODEV;
+ /* Only DOM0 is responsible for MCE logging */
+ if (!xen_initial_domain())
+ return -ENODEV;
+
+ /* register character device /dev/mcelog for xen mcelog */
+ ret = misc_register(&xen_mce_chrdev_device);
+ if (ret)
+ return ret;
+
+ ret = bind_virq_for_mce();
+ if (ret)
+ goto deregister;
+
+ return 0;
+
+deregister:
+ misc_deregister(&xen_mce_chrdev_device);
+ return ret;
}
device_initcall(xen_late_init_mcelog);