diff mbox series

[net-next,07/11] net: ravb: Simplify UDP TX checksum offload

Message ID 20240930160845.8520-8-paul@pbarker.dev (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series Extend GbEth checksum offload support to VLAN/IPv6 packets | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 9 this patch: 9
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 9 this patch: 9
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn fail Errors and warnings before: 12 this patch: 12
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 22 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Paul Barker Sept. 30, 2024, 4:08 p.m. UTC 
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(-)

Comments

Sergey Shtylyov Sept. 30, 2024, 7:39 p.m. UTC | #1 
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
diff mbox series

Patch

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 */