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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2015-03-05 14:24:17 +0300 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2015-03-16 17:49:15 +0300 |
| commit | ebfe79a7c85c171def09ff86f6fdea254a51d6c9 (patch) | |
| tree | 7866d06e9560bee83343c2b08fd20fe47d87bfdb /drivers/xen | |
| parent | 4e8c0c8c4bf3a5b5c98046e146ab3884bf7a7d0e (diff) | |
| download | linux-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.c | 25 |
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); |