>-----Original Message-----
>From: Jakub Kicinski <k...@kernel.org>
>Sent: Thursday, April 8, 2021 7:07 PM
>To: Y.b. Lu <yangbo...@nxp.com>
>Cc: netdev@vger.kernel.org; David S . Miller <da...@davemloft.net>;
>Richard Cochran <richardcoch...@gmail.com>; Claudiu Manoil
><claudiu.man...@nxp.com>; Vladimir Oltean <vladimir.olt...@nxp.com>;
>Russell King <li...@armlinux.org.uk>
>Subject: Re: [net-next, v2, 2/2] enetc: support PTP Sync packet one-step
>timestamping
>
>On Thu, 8 Apr 2021 09:02:50 -0700 Jakub Kicinski wrote:
>> if (priv->flags & ONESTEP_BUSY) {
>> skb_queue_tail(&priv->tx_skbs, skb);
>> return ...;
>> }
>> priv->flags |= ONESTEP_BUSY;
>
>Ah, if you have multiple queues this needs to be under a separate
>spinlock, 'cause netif_tx_lock() won't be enough.
Hi Yangbo,
Please try test_and_set_bit_lock()/ clear_bit_unlock() based on Jakub's
suggestion, and see if it works for you / whether it can replace the mutex.
Thanks,
Claudiu
