linux-kernel - [PATCH 1/2] net: macb: Remove unnecessary alignment check for TSO

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Message-Id: <1580466455-27288-2-git-send-email-harini.katakam@xilinx.com>
Date:   Fri, 31 Jan 2020 15:57:34 +0530
From:   Harini Katakam <harini.katakam@...inx.com>
To:     nicolas.ferre@...rochip.com, davem@...emloft.net,
        claudiu.beznea@...rochip.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        michal.simek@...inx.com, harinikatakamlinux@...il.com,
        harini.katakam@...inx.com
Subject: [PATCH 1/2] net: macb: Remove unnecessary alignment check for TSO

The IP TSO implementation does NOT require the length to be a
multiple of 8. That is only a requirement for UFO as per IP
documentation.

Signed-off-by: Harini Katakam <harini.katakam@...inx.com>
---
 drivers/net/ethernet/cadence/macb_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 7a2fe63..2e418b8 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -1792,7 +1792,7 @@ static netdev_features_t macb_features_check(struct sk_buff *skb,
 	/* Validate LSO compatibility */
 
 	/* there is only one buffer */
-	if (!skb_is_nonlinear(skb))
+	if (!skb_is_nonlinear(skb) || (ip_hdr(skb)->protocol != IPPROTO_UDP))
 		return features;
 
 	/* length of header */
-- 
2.7.4