[PATCH 1/1] ethernet: atheros: fix return value check in atl1_tso()

[Kuniyuki Iwashima <kuniyu@amazon.com>]

From: Yuanjun Gong <ruc_gongyuanjun@163.com>
Date: Thu, 20 Jul 2023 22:41:54 +0800
> 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().
>

Please add Fixes tag and specify the target tree as net in Subject.

Also, it would be better to post related patches as a single series:

https://lore.kernel.org/netdev/20230720144208.39170-1-ruc_gongyuanjun@163.com/T/#u
https://lore.kernel.org/netdev/20230720144219.39285-1-ruc_gongyuanjun@163.com/T/#u


> Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.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