netdev - [PATCH net v2 1/1] atheros: fix return value check in atl1

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Date: Sat, 22 Jul 2023 22:25:11 +0800
From: Yuanjun Gong <ruc_gongyuanjun@....com>
To: kuniyu@...zon.com
Cc: chris.snook@...il.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	netdev@...r.kernel.org,
	ruc_gongyuanjun@....com
Subject: [PATCH net v2 1/1] atheros: fix return value check in atl1_tso()

in atl1_tso(), it should check the return value of pskb_trim(),
and return an error code if an unexpected value is returned
by pskb_trim().

Fixes: 401c0aabec4b ("atl1: simplify tx packet descriptor")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@....com>
---
 drivers/net/ethernet/atheros/atlx/atl1.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/atheros/atlx/atl1.c b/drivers/net/ethernet/atheros/atlx/atl1.c
index c8444bcdf527..02aa6fd8ebc2 100644
--- a/drivers/net/ethernet/atheros/atlx/atl1.c
+++ b/drivers/net/ethernet/atheros/atlx/atl1.c
@@ -2113,8 +2113,11 @@ static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
 
 			real_len = (((unsigned char *)iph - skb->data) +
 				ntohs(iph->tot_len));
-			if (real_len < skb->len)
-				pskb_trim(skb, real_len);
+			if (real_len < skb->len) {
+				err = pskb_trim(skb, real_len);
+				if (err)
+					return err;
+			}
 			hdr_len = skb_tcp_all_headers(skb);
 			if (skb->len == hdr_len) {
 				iph->check = 0;
-- 
2.17.1