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livepatch: use kstrtobool() in enabled_store() 

The sysfs enabled value is a boolean, so kstrtobool() is a better fit
for parsing the input string since it does the range checking for us.

Suggested-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Josh Poimboeuf 2017-02-13 19:42:38 -06:00 committed by Jiri Kosina
parent c349cdcaba
commit 68ae4b2b68
1 changed files with 5 additions and 8 deletions
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13
kernel/livepatch/core.c
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@ -408,26 +408,23 @@ static ssize_t enabled_store(struct kobject *kobj, struct kobj_attribute *attr,
{
struct klp_patch *patch;
int ret;
unsigned long val;
bool enabled;
ret = kstrtoul(buf, 10, &val);
ret = kstrtobool(buf, &enabled);
if (ret)
return -EINVAL;
if (val > 1)
return -EINVAL;
return ret;
patch = container_of(kobj, struct klp_patch, kobj);
mutex_lock(&klp_mutex);
if (patch->enabled == val) {
if (patch->enabled == enabled) {
/* already in requested state */
ret = -EINVAL;
goto err;
}
if (val) {
if (enabled) {
ret = __klp_enable_patch(patch);
if (ret)
goto err;