6lowpan: iphc: fix invalid case handling

This patch fixes the return value in a case which should never occur. Instead returning "-EINVAL" we return LOWPAN_IPHC_DAM_00 which is invalid on context based addresses. Also change the WARN_ON_ONCE to WARN_ONCE which was suggested by Dan Carpenter. Reported-by: Dan Carpenter <[email protected]> Signed-off-by: Alexander Aring <[email protected]> Signed-off-by: Marcel Holtmann <[email protected]>
niw · Feb 26, 2016 · 2306f65 · 2306f65
1 parent 395174b
commit 2306f65
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/net/6lowpan/iphc.c b/net/6lowpan/iphc.c
@@ -811,8 +811,8 @@ static u8 lowpan_compress_ctx_addr(u8 **hc_ptr, const struct in6_addr *ipaddr,
 		goto out;
 	}
 
-	WARN_ON_ONCE("context found but no address mode matched\n");
-	return -EINVAL;
+	WARN_ONCE(1, "context found but no address mode matched\n");
+	return LOWPAN_IPHC_DAM_00;
 out:
 
 	if (sam)