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PM / QoS: simplify pm_qos_power_write() 

Let kstrtos32_from_user() do the necessary calls and checks.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Andy Shevchenko 2013-09-11 17:02:38 +03:00 committed by Rafael J. Wysocki
parent 61e6cfa80d
commit d4f7ecf728
1 changed files with 4 additions and 22 deletions
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26
kernel/power/qos.c
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@ -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;