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authorDan Carpenter <dan.carpenter@oracle.com>2015-03-05 14:24:17 +0300
committerDavid Vrabel <david.vrabel@citrix.com>2015-03-16 17:49:15 +0300
commitebfe79a7c85c171def09ff86f6fdea254a51d6c9 (patch)
tree7866d06e9560bee83343c2b08fd20fe47d87bfdb /drivers/xen
parent4e8c0c8c4bf3a5b5c98046e146ab3884bf7a7d0e (diff)
downloadlinux-ebfe79a7c85c171def09ff86f6fdea254a51d6c9.tar.xz
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>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/mcelog.c25
1 files changed, 18 insertions, 7 deletions
diff --git a/drivers/xen/mcelog.c b/drivers/xen/mcelog.c
index 6ab6a79c38a5..a493c7315e94 100644
--- a/drivers/xen/mcelog.c
+++ b/drivers/xen/mcelog.c
@@ -393,14 +393,25 @@ static int bind_virq_for_mce(void)
static int __init xen_late_init_mcelog(void)
{
+ int ret;
+
/* 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();
- }
+ 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 -ENODEV;
+ return 0;
+
+deregister:
+ misc_deregister(&xen_mce_chrdev_device);
+ return ret;
}
device_initcall(xen_late_init_mcelog);