From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Tue, 14 Feb 2017 01:42:38 +0000 (-0600)
Subject: livepatch: use kstrtobool() in enabled_store()
X-Git-Tag: v4.12-rc1~125^2^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=68ae4b2b687c3da59ca1d762646ddece4ea1c438;p=thirdparty%2Flinux.git

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>
---

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index 6a137e1f4490a..83c4949862b42 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -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;