From d4f7ecf72819932e0f0a2221328d5eb4e28cc059 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 11 Sep 2013 17:02:38 +0300 Subject: [PATCH] PM / QoS: simplify pm_qos_power_write() Let kstrtos32_from_user() do the necessary calls and checks. Signed-off-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki --- kernel/power/qos.c | 26 ++++---------------------- 1 file changed, 4 insertions(+), 22 deletions(-) diff --git a/kernel/power/qos.c b/kernel/power/qos.c index a394297f8b2f..8dff9b48075a 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -558,30 +558,12 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf, if (count == sizeof(s32)) { if (copy_from_user(&value, buf, sizeof(s32))) return -EFAULT; - } else if (count <= 11) { /* ASCII perhaps? */ - char ascii_value[11]; - unsigned long int ulval; + } else { int ret; - if (copy_from_user(ascii_value, buf, count)) - return -EFAULT; - - if (count > 10) { - if (ascii_value[10] == '\n') - ascii_value[10] = '\0'; - else - return -EINVAL; - } else { - ascii_value[count] = '\0'; - } - ret = kstrtoul(ascii_value, 16, &ulval); - if (ret) { - pr_debug("%s, 0x%lx, 0x%x\n", ascii_value, ulval, ret); - return -EINVAL; - } - value = (s32)lower_32_bits(ulval); - } else { - return -EINVAL; + ret = kstrtos32_from_user(buf, count, 16, &value); + if (ret) + return ret; } req = filp->private_data; -- 2.39.5