From 68ae4b2b687c3da59ca1d762646ddece4ea1c438 Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf Date: Mon, 13 Feb 2017 19:42:38 -0600 Subject: [PATCH] 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 Signed-off-by: Josh Poimboeuf Acked-by: Miroslav Benes Reviewed-by: Petr Mladek Signed-off-by: Jiri Kosina --- kernel/livepatch/core.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index 6a137e1f4490..83c4949862b4 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; -- 2.20.1