ath5k: use kstrtoint() to parse numbers coming from sysfs

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath5k/sysfs.c b/drivers/net/wireless/ath/ath5k/sysfs.c
index 1090bbab9459..5406f44309c8 100644
--- a/drivers/net/wireless/ath/ath5k/sysfs.c
+++ b/drivers/net/wireless/ath/ath5k/sysfs.c
@@ -19,9 +19,11 @@ static ssize_t ath5k_attr_store_##name(struct device *dev,		\
                         const char *buf, size_t count)                  \
 {                                                                       \
         struct ath5k_softc *sc = dev_get_drvdata(dev);                  \
-        int val;                                                        \
+        int val, ret;                                                   \
                                                                         \
-        val = (int)simple_strtoul(buf, NULL, 10);                       \
+        ret = kstrtoint(buf, 10, &val);                                 \
+        if (ret < 0)                                                    \
+                return ret;                                             \
         set(sc->ah, val);                                               \
         return count;                                                   \
 }                                                                       \