From 8cf05b96c6b44f7349315b5d123324e0030472eb Mon Sep 17 00:00:00 2001
From: Florian Pose <fp@igh.de>
Date: Fri, 25 Apr 2014 17:05:39 +0200
Subject: [PATCH] Avoided unused return value warning.

---
 devices/ccat/update.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/devices/ccat/update.c b/devices/ccat/update.c
index 739d901d..3e16f2cf 100644
--- a/devices/ccat/update.c
+++ b/devices/ccat/update.c
@@ -165,7 +165,10 @@ static ssize_t ccat_update_write(struct file *const f, const char __user * buf,
 	if (*off + len > sizeof(update->data))
 		return 0;
 
-	copy_from_user(update->data + *off, buf, len);
+	if (copy_from_user(update->data + *off, buf, len)) {
+		return -EFAULT;
+	}
+
 	*off += len;
 	update->size = *off;
 	return len;