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>

1 files changed, 2 insertions, 7 deletions

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);