netdev - [PATCH net-next 14/15] can: Remove SKB list assumptions in rx-offload.c

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Message-Id: <20180908.131110.654858242957058858.davem@davemloft.net>
Date:   Sat, 08 Sep 2018 13:11:10 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     netdev@...r.kernel.org
Subject: [PATCH net-next 14/15] can: Remove SKB list assumptions in
 rx-offload.c


Eliminate code which assumes that SKBs and skb_queue_head objects
can be cast to eachother during list processing.

Signed-off-by: David S. Miller <davem@...emloft.net>
---
 drivers/net/can/rx-offload.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/rx-offload.c b/drivers/net/can/rx-offload.c
index d94dae216820..c7d05027a7a0 100644
--- a/drivers/net/can/rx-offload.c
+++ b/drivers/net/can/rx-offload.c
@@ -79,7 +79,7 @@ static int can_rx_offload_napi_poll(struct napi_struct *napi, int quota)
 static inline void __skb_queue_add_sort(struct sk_buff_head *head, struct sk_buff *new,
 					int (*compare)(struct sk_buff *a, struct sk_buff *b))
 {
-	struct sk_buff *pos, *insert = (struct sk_buff *)head;
+	struct sk_buff *pos, *insert = NULL;
 
 	skb_queue_reverse_walk(head, pos) {
 		const struct can_rx_offload_cb *cb_pos, *cb_new;
@@ -99,8 +99,10 @@ static inline void __skb_queue_add_sort(struct sk_buff_head *head, struct sk_buf
 		insert = pos;
 		break;
 	}
-
-	__skb_queue_after(head, insert, new);
+	if (!insert)
+		__skb_queue_head(head, new);
+	else
+		__skb_queue_after(head, insert, new);
 }
 
 static int can_rx_offload_compare(struct sk_buff *a, struct sk_buff *b)
-- 
2.17.1