netdev - [PATCH net-next 23/36] can: slcan: add software tx timestamps

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Date:   Sun, 31 Jul 2022 21:20:16 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
        kernel@...gutronix.de,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 23/36] can: slcan: add software tx timestamps

From: Vincent Mailhol <mailhol.vincent@...adoo.fr>

TX timestamps were added to the can_put_echo_skb() function of can_dev
modules in [1]. However, slcan does not rely on that function and as
such does not offer TX timestamping.

Add a call to skb_tx_timestamp() in the slc_xmit() function so that
the module now supports TX software timestamps.

[1] commit 741b91f1b0ea ("can: dev: can_put_echo_skb(): add software
tx timestamps")
Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=741b91f1b0ea34f00f6a7d4539b767c409291fcf

CC: Dario Binacchi <dario.binacchi@...rulasolutions.com>
Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
Link: https://lore.kernel.org/all/20220727101641.198847-4-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/slcan/slcan-core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/can/slcan/slcan-core.c b/drivers/net/can/slcan/slcan-core.c
index 93e9b08f5653..8d13fdf8c28a 100644
--- a/drivers/net/can/slcan/slcan-core.c
+++ b/drivers/net/can/slcan/slcan-core.c
@@ -612,6 +612,8 @@ static netdev_tx_t slcan_netdev_xmit(struct sk_buff *skb,
 	slcan_encaps(sl, (struct can_frame *)skb->data); /* encaps & send */
 	spin_unlock(&sl->lock);
 
+	skb_tx_timestamp(skb);
+
 out:
 	kfree_skb(skb);
 	return NETDEV_TX_OK;
-- 
2.35.1