Staging: batman-adv: return -EFAULT on copy_to_user errors

copy_to_user() returns the number of bites remaining but we want to
return a negative error code here.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/batman-adv/device.c b/drivers/staging/batman-adv/device.c
index 7eb6559e03158d07eada6eccddf882ddaa2ec537..32204b5572d0c8e78a34b89c69a04c6d11cb762c 100644 (file)
--- a/drivers/staging/batman-adv/device.c
+++ b/drivers/staging/batman-adv/device.c
@@ -196,7 +196,7 @@ ssize_t bat_device_read(struct file *file, char __user *buf, size_t count,
        kfree(device_packet);
 
        if (error)
-               return error;
+               return -EFAULT;
 
        return sizeof(struct icmp_packet);
 }