netdev - Re: [PATCH net-next v3 4/9] net: stmmac: Introduce dwmac1000 ptp_clock

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Message-ID: <20241111161205.25c53c62@kernel.org>
Date: Mon, 11 Nov 2024 16:12:05 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>, Jose Abreu
 <joabreu@...opsys.com>, Andrew Lunn <andrew+netdev@...n.ch>,
 davem@...emloft.net, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, Richard
 Cochran <richardcochran@...il.com>, Alexis Lothoré
 <alexis.lothore@...tlin.com>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v3 4/9] net: stmmac: Introduce dwmac1000
 ptp_clock_info and operations

On Wed,  6 Nov 2024 10:03:25 +0100 Maxime Chevallier wrote:
> +		mutex_unlock(&priv->aux_ts_lock);
> +
> +		/* wait for auxts fifo clear to finish */
> +		ret = readl_poll_timeout(ptpaddr + PTP_TCR, tcr_val,
> +					 !(tcr_val & GMAC_PTP_TCR_ATSFC),
> +					 10, 10000);

Is there a good reason to wait for the flush to complete outside of 
the mutex?