nfp: bpf: improve wrong FW response warnings

When FW responds with a message of wrong size or type make sure
the type is checked first and included in the wrong size message.
This makes it easier to figure out which FW command failed.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

drivers/net/ethernet/netronome/nfp/bpf/cmsg.c

@@ -218,17 +218,17 @@ nfp_bpf_cmsg_communicate(struct nfp_app_bpf *bpf, struct sk_buff *skb,
 		return skb;
 
 	hdr = (struct cmsg_hdr *)skb->data;
-	/* 0 reply_size means caller will do the validation */
-	if (reply_size && skb->len != reply_size) {
-		cmsg_warn(bpf, "cmsg drop - wrong size %d != %d!\n",
-			  skb->len, reply_size);
-		goto err_free;
-	}
 	if (hdr->type != __CMSG_REPLY(type)) {
 		cmsg_warn(bpf, "cmsg drop - wrong type 0x%02x != 0x%02lx!\n",
 			  hdr->type, __CMSG_REPLY(type));
 		goto err_free;
 	}
+	/* 0 reply_size means caller will do the validation */
+	if (reply_size && skb->len != reply_size) {
+		cmsg_warn(bpf, "cmsg drop - type 0x%02x wrong size %d != %d!\n",
+			  type, skb->len, reply_size);
+		goto err_free;
+	}
 
 	return skb;
 err_free: