netdev - Re: [PATCH net-next 10/10] bnxt_en: Remove atomic operations on ptp->tx

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Message-ID: <cbd9c870-def1-4f06-92ed-67d809a7d8a6@intel.com>
Date: Thu, 27 Jun 2024 11:40:18 +0200
From: Przemek Kitszel <przemyslaw.kitszel@...el.com>
To: Michael Chan <michael.chan@...adcom.com>
CC: <netdev@...r.kernel.org>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <pavan.chebbi@...adcom.com>,
	<andrew.gospodarek@...adcom.com>, <richardcochran@...il.com>,
	<davem@...emloft.net>
Subject: Re: [PATCH net-next 10/10] bnxt_en: Remove atomic operations on
 ptp->tx_avail

On 6/26/24 18:43, Michael Chan wrote:
> From: Pavan Chebbi <pavan.chebbi@...adcom.com>
> 
> Now that we require the spinlock to protect ptp->txts_prod, change
> ptp->tx_avail to non-atomic and protect it under the same spinlock.

Under what condition you will exceed those 4 entries?

> Add a new helper function bnxt_ptp_get_txts_prod() to decrement
> ptp->tx_avail under spinlock and return the producer.
> 
> Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
> Signed-off-by: Michael Chan <michael.chan@...adcom.com>

overall it is a good series, thanks!

> ---
>   drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 20 +++-------------
>   drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 23 +++++++++++++++----
>   drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 10 +++++++-
>   3 files changed, 31 insertions(+), 22 deletions(-)
>