diff --git a/[refs] b/[refs]
index eb190c5ebafe..67a2870984b3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4f72427998b105392e60bae7a6798a0c96fe4f0a
+refs/heads/master: c40499e04b2005e61f989824251f9343b55f96bb
diff --git a/trunk/drivers/isdn/gigaset/isocdata.c b/trunk/drivers/isdn/gigaset/isocdata.c
index b171e75cb52e..29808c4fb1cb 100644
--- a/trunk/drivers/isdn/gigaset/isocdata.c
+++ b/trunk/drivers/isdn/gigaset/isocdata.c
@@ -175,7 +175,7 @@ int gigaset_isowbuf_getbytes(struct isowbuf_t *iwb, int size)
 		return -EINVAL;
 	}
 	src = iwb->read;
-	if (unlikely(limit > BAS_OUTBUFSIZE + BAS_OUTBUFPAD ||
+	if (unlikely(limit >= BAS_OUTBUFSIZE + BAS_OUTBUFPAD ||
 		     (read < src && limit >= src))) {
 		pr_err("isoc write buffer frame reservation violated\n");
 		return -EFAULT;