There is better to use kstrto* instead of simple_strtoul. In this case it
applies a bit stricter rules for input as well.
Signed-off-by: Andy Shevchenko <[email protected]>
---
drivers/net/wireless/ipw2x00/ipw2100.c | 32 +++++++-------------------------
1 file changed, 7 insertions(+), 25 deletions(-)
diff --git a/drivers/net/wireless/ipw2x00/ipw2100.c b/drivers/net/wireless/ipw2x00/ipw2100.c
index cb066f6..15920aa 100644
--- a/drivers/net/wireless/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/ipw2x00/ipw2100.c
@@ -4167,17 +4167,11 @@ static ssize_t show_debug_level(struct device_driver *d, char *buf)
static ssize_t store_debug_level(struct device_driver *d,
const char *buf, size_t count)
{
- char *p = (char *)buf;
u32 val;
+ int ret;
- if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
- p++;
- if (p[0] == 'x' || p[0] == 'X')
- p++;
- val = simple_strtoul(p, &p, 16);
- } else
- val = simple_strtoul(p, &p, 10);
- if (p == buf)
+ ret = kstrtou32(buf, 0, &val);
+ if (ret)
IPW_DEBUG_INFO(": %s is not in hex or decimal form.\n", buf);
else
ipw2100_debug_level = val;
@@ -4238,27 +4232,15 @@ static ssize_t store_scan_age(struct device *d, struct device_attribute *attr,
{
struct ipw2100_priv *priv = dev_get_drvdata(d);
struct net_device *dev = priv->net_dev;
- char buffer[] = "00000000";
- unsigned long len =
- (sizeof(buffer) - 1) > count ? count : sizeof(buffer) - 1;
unsigned long val;
- char *p = buffer;
+ int ret;
(void)dev; /* kill unused-var warning for debug-only code */
IPW_DEBUG_INFO("enter\n");
- strncpy(buffer, buf, len);
- buffer[len] = 0;
-
- if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
- p++;
- if (p[0] == 'x' || p[0] == 'X')
- p++;
- val = simple_strtoul(p, &p, 16);
- } else
- val = simple_strtoul(p, &p, 10);
- if (p == buffer) {
+ ret = kstrtoul(buf, 0, &val);
+ if (ret) {
IPW_DEBUG_INFO("%s: user supplied invalid value.\n", dev->name);
} else {
priv->ieee->scan_age = val;
@@ -4266,7 +4248,7 @@ static ssize_t store_scan_age(struct device *d, struct device_attribute *attr,
}
IPW_DEBUG_INFO("exit\n");
- return len;
+ return strnlen(buf, count);
}
static DEVICE_ATTR(scan_age, S_IWUSR | S_IRUGO, show_scan_age, store_scan_age);
--
1.8.2.rc0.22.gb3600c3