openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

oprofile, x86: fix init_sysfs error handling 

On failure init_sysfs() might not properly free resources. The error
code of the function is not checked. And, when reinitializing the exit
function might be called twice. This patch fixes all this.

Cc: stable@kernel.org
Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2010-08-30 10:56:18 +02:00
parent 750d857c68
commit 10f0412f57
1 changed files with 13 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/x86/oprofile/nmi_int.c
View File

@ -568,8 +568,13 @@ static int __init init_sysfs(void)
int error;
error = sysdev_class_register(&oprofile_sysclass);
if (!error)
error = sysdev_register(&device_oprofile);
if (error)
return error;
error = sysdev_register(&device_oprofile);
if (error)
sysdev_class_unregister(&oprofile_sysclass);
return error;
}
@ -695,6 +700,8 @@ int __init op_nmi_init(struct oprofile_operations *ops)
char *cpu_type = NULL;
int ret = 0;
using_nmi = 0;
if (!cpu_has_apic)
return -ENODEV;
@ -774,7 +781,10 @@ int __init op_nmi_init(struct oprofile_operations *ops)
mux_init(ops);
init_sysfs();
ret = init_sysfs();
if (ret)
return ret;
using_nmi = 1;
printk(KERN_INFO "oprofile: using NMI interrupt.\n");
return 0;