1 files changed, 4 insertions, 4 deletions

diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
index cbf022cb3121..9b2a222518f7 100644
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@ -226,6 +226,7 @@ int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
         int ucf_hdr_len = sizeof(struct unicast_frag_packet);
         int data_len = skb->len - uc_hdr_len;
         int large_tail = 0;
+        uint16_t seqno;
 
         if (!bat_priv->primary_if)
                 goto dropped;
@@ -261,10 +262,9 @@ int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
         frag1->flags = UNI_FRAG_HEAD | large_tail;
         frag2->flags = large_tail;
 
-        frag1->seqno = htons((uint16_t)atomic_inc_return(
-                             &batman_if->frag_seqno));
-        frag2->seqno = htons((uint16_t)atomic_inc_return(
-                             &batman_if->frag_seqno));
+        seqno = atomic_add_return(2, &batman_if->frag_seqno);
+        frag1->seqno = htons(seqno - 1);
+        frag2->seqno = htons(seqno);
 
         send_skb_packet(skb, batman_if, dstaddr);
         send_skb_packet(frag_skb, batman_if, dstaddr);