can: raw: use guard clause to optimize nesting in raw_rcv()

We can use guard clause to optimize nesting codes like
if (condition) { ... } else { return; } in raw_rcv();

Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Link: https://lore.kernel.org/all/0170ad1f07dbe838965df4274fce950980fa9d1f.1661584485.git.william.xuanziyang@huawei.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/net/can/raw.c b/net/can/raw.c
index 9ae7c42..e7dfa35 100644 (file)
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -136,14 +136,13 @@ static void raw_rcv(struct sk_buff *oskb, void *data)
        /* eliminate multiple filter matches for the same skb */
        if (this_cpu_ptr(ro->uniq)->skb == oskb &&
            this_cpu_ptr(ro->uniq)->skbcnt == can_skb_prv(oskb)->skbcnt) {
-               if (ro->join_filters) {
-                       this_cpu_inc(ro->uniq->join_rx_count);
-                       /* drop frame until all enabled filters matched */
-                       if (this_cpu_ptr(ro->uniq)->join_rx_count < ro->count)
-                               return;
-               } else {
+               if (!ro->join_filters)
+                       return;
+
+               this_cpu_inc(ro->uniq->join_rx_count);
+               /* drop frame until all enabled filters matched */
+               if (this_cpu_ptr(ro->uniq)->join_rx_count < ro->count)
                        return;
-               }
        } else {
                this_cpu_ptr(ro->uniq)->skb = oskb;
                this_cpu_ptr(ro->uniq)->skbcnt = can_skb_prv(oskb)->skbcnt;