asus-wmi: return proper value in store_cpufv()

Cc: stable@kernel.org
Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index e50872632c5a..3b9fb91e25ff 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1307,14 +1307,18 @@ ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
                            const char *buf, size_t count)
 {
-        int value;
+        int value, rv;
 
         if (!count || sscanf(buf, "%i", &value) != 1)
                 return -EINVAL;
         if (value < 0 || value > 2)
                 return -EINVAL;
 
-        return asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
+        rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
+        if (rv < 0)
+                return rv;
+
+        return count;
 }
 
 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);