From: Paul Barker <paul.barker.ct@bp.renesas.com>

The GbEth IP will pass through a null UDP checksum without asserting any
error flags so we do not need to resort to software checksum calculation
in this case.

Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
---
 drivers/net/ethernet/renesas/ravb_main.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 9350ca10ab22..ae0268f2eb04 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2075,20 +2075,12 @@ static bool ravb_can_tx_csum_gbeth(struct sk_buff *skb)
 
 	switch (ip->protocol) {
 	case IPPROTO_TCP:
-		break;
 	case IPPROTO_UDP:
-		/* If the checksum value in the UDP header field is 0, TOE does
-		 * not calculate checksum for UDP part of this frame as it is
-		 * optional function as per standards.
-		 */
-		if (udp_hdr(skb)->check == 0)
-			return false;
-		break;
+		return true;
+
 	default:
 		return false;
 	}
-
-	return true;
 }
 
 /* Packet transmit function for Ethernet AVB */
-- 
2.43.0

On 9/30/24 19:08, Paul Barker wrote:

> From: Paul Barker <paul.barker.ct@bp.renesas.com>
> 
> The GbEth IP will pass through a null UDP checksum without asserting any

   s/null/zero/, perhaps?

> error flags so we do not need to resort to software checksum calculation
> in this case.
> 
> Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

[...]

> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 9350ca10ab22..ae0268f2eb04 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -2075,20 +2075,12 @@ static bool ravb_can_tx_csum_gbeth(struct sk_buff *skb)
>  
>  	switch (ip->protocol) {
>  	case IPPROTO_TCP:
> -		break;
>  	case IPPROTO_UDP:
> -		/* If the checksum value in the UDP header field is 0, TOE does
> -		 * not calculate checksum for UDP part of this frame as it is
> -		 * optional function as per standards.
> -		 */
> -		if (udp_hdr(skb)->check == 0)
> -			return false;
> -		break;
> +		return true;
> +

   No need for an empty line here, it's not used elsewhere in the *switch*
statements...

>  	default:
>  		return false;
>  	}

[...]

MBR, Sergey