linux-kernel - Re: [PATCH v3] net: stmmac: move the lock to struct plat_stmmacenet

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Message-ID: <ZjszuWWw8PPxNyKE@shell.armlinux.org.uk>
Date: Wed, 8 May 2024 09:11:37 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Xiaolei Wang <xiaolei.wang@...driver.com>
Cc: alexandre.torgue@...s.st.com, joabreu@...opsys.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	mcoquelin.stm32@...il.com, richardcochran@...il.com,
	bartosz.golaszewski@...aro.org, horms@...nel.org,
	ahalaney@...hat.com, rohan.g.thomas@...el.com,
	j.zink@...gutronix.de, leong.ching.swee@...el.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 v3] net: stmmac: move the lock to struct
 plat_stmmacenet_data

On Wed, May 08, 2024 at 12:52:57PM +0800, Xiaolei Wang wrote:
> Reinitialize the whole est structure would also reset the mutex lock
> which is embedded in the est structure, and then trigger the following
> warning. To address this, move the lock to struct plat_stmmacenet_data.
> We also need to require the mutex lock when doing this initialization.

What is plat->lock protecting exactly? "lock" is opaque and doesn't
hint at its purpose. Does it serialise accesses to plat->est? If so,
consider naming it plat->est_lock to make its purpose and what it's
doing clear.

Please also follow netdev best practice; allow at least 24 hours to
pass _and_ for discussion to finish before posting a new version of
a patch or patch series.

Also see the "How do I indicate which tree" question at:
https://www.kernel.org/doc/html/v5.3/networking/netdev-FAQ.html

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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