netdev - [PATCH 1/2] Bluetooth: 6LoWPAN: Modify the error handling in the loop

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Date:   Mon, 20 Mar 2023 14:31:55 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     simon.horman@...igine.com
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux-bluetooth@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH 1/2] Bluetooth: 6LoWPAN: Modify the error handling in the loop

Return the error when send_pkt fails in order to avoid the error being
overwritten.
Moreover, remove the redundant 'ret'.

Fixes: 9c238ca8ec79 ("Bluetooth: 6lowpan: Check transmit errors for multicast packets")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 net/bluetooth/6lowpan.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 4eb1b3ced0d2..bd6dbca5747f 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -474,22 +474,20 @@ static int send_mcast_pkt(struct sk_buff *skb, struct net_device *netdev)
 		dev = lowpan_btle_dev(entry->netdev);
 
 		list_for_each_entry_rcu(pentry, &dev->peers, list) {
-			int ret;
-
 			local_skb = skb_clone(skb, GFP_ATOMIC);
 
 			BT_DBG("xmit %s to %pMR type %u IP %pI6c chan %p",
 			       netdev->name,
 			       &pentry->chan->dst, pentry->chan->dst_type,
 			       &pentry->peer_addr, pentry->chan);
-			ret = send_pkt(pentry->chan, local_skb, netdev);
-			if (ret < 0)
-				err = ret;
-
+			err = send_pkt(pentry->chan, local_skb, netdev);
 			kfree_skb(local_skb);
+			if (err < 0)
+				goto out;
 		}
 	}
 
+out:
 	rcu_read_unlock();
 
 	return err;
-- 
2.25.1