From: Alexander Aring <alex.aring@gmail.com>
Date: Wed, 2 Sep 2015 12:21:22 +0000 (+0200)
Subject: ieee802154: 6lowpan: cleanup pull of iphc bytes
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=ad23d5b9da399c0ecbe58e16c6603c3fcdcafdbd;p=openwrt%2Fstaging%2Fblogic.git

ieee802154: 6lowpan: cleanup pull of iphc bytes

This patch cleanups the pull of the iphc bytes. We don't need to check
if the skb->len contains two bytes, this will be checked by
lowpan_fetch_skb_u8.

Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---

diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
index c529d9f2561f..4ddf69445032 100644
--- a/net/ieee802154/6lowpan/rx.c
+++ b/net/ieee802154/6lowpan/rx.c
@@ -33,14 +33,9 @@ iphc_decompress(struct sk_buff *skb, const struct ieee802154_hdr *hdr)
 	void *sap, *dap;
 
 	raw_dump_table(__func__, "raw skb data dump", skb->data, skb->len);
-	/* at least two bytes will be used for the encoding */
-	if (skb->len < 2)
-		return -EINVAL;
-
-	if (lowpan_fetch_skb_u8(skb, &iphc0))
-		return -EINVAL;
 
-	if (lowpan_fetch_skb_u8(skb, &iphc1))
+	if (lowpan_fetch_skb_u8(skb, &iphc0) ||
+	    lowpan_fetch_skb_u8(skb, &iphc1))
 		return -EINVAL;
 
 	ieee802154_addr_to_sa(&sa, &hdr->source);