netdev - Re: [PATCH net v2 1/1] net: stmmac: fix incorrect flag check in timestamp interrupt

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Date: Mon, 18 Dec 2023 12:48:20 -0800
From: Jacob Keller <jacob.e.keller@...el.com>
To: Lai Peter Jun Ann <jun.ann.lai@...el.com>, Alexandre Torgue
	<alexandre.torgue@...s.st.com>, Jose Abreu <joabreu@...opsys.com>, "David S.
 Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, "Jakub
 Kicinski" <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Maxime Coquelin
	<mcoquelin.stm32@...il.com>
CC: <netdev@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, "Song
 Yoong Siang" <yoong.siang.song@...el.com>
Subject: Re: [PATCH net v2 1/1] net: stmmac: fix incorrect flag check in
 timestamp interrupt



On 12/17/2023 11:51 PM, Lai Peter Jun Ann wrote:
> The driver should continue get the timestamp if STMMAC_FLAG_EXT_SNAPSHOT_EN
> flag is set.
> 

Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>

> Fixes: aa5513f5d95f ("net: stmmac: replace the ext_snapshot_en field with a flag")
> Cc: <stable@...r.kernel.org> # 6.6
> Signed-off-by: Song Yoong Siang <yoong.siang.song@...el.com>
> Signed-off-by: Lai Peter Jun Ann <jun.ann.lai@...el.com>
> ---
> v2 changelog:
>  - Add fix tag and stable@...r.kernel.org in email cc list.
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c
> index 540f6a4..f05bd75 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c
> @@ -237,7 +237,7 @@ static void timestamp_interrupt(struct stmmac_priv *priv)
>  	 */
>  	ts_status = readl(priv->ioaddr + GMAC_TIMESTAMP_STATUS);
>  
> -	if (priv->plat->flags & STMMAC_FLAG_EXT_SNAPSHOT_EN)
> +	if (!(priv->plat->flags & STMMAC_FLAG_EXT_SNAPSHOT_EN))
>  		return;
>  
>  	num_snapshot = (ts_status & GMAC_TIMESTAMP_ATSNS_MASK) >>