linux-kernel - Re: [PATCH] net: phy: mediatek: fix nvmem cell reference leak in mt798x_phy

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Message-ID: <57437939-6983-4db8-9178-dd19f1c7b971@lunn.ch>
Date: Thu, 11 Dec 2025 14:34:30 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Miaoqian Lin <linmq006@...il.com>
Cc: Daniel Golle <daniel@...rotopia.org>, Qingfang Deng <dqfext@...il.com>,
	SkyLake Huang <SkyLake.Huang@...iatek.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, stable@...r.kernel.org
Subject: Re: [PATCH] net: phy: mediatek: fix nvmem cell reference leak in
 mt798x_phy_calibration

On Thu, Dec 11, 2025 at 12:13:13PM +0400, Miaoqian Lin wrote:
> When nvmem_cell_read() fails in mt798x_phy_calibration(), the function
> returns without calling nvmem_cell_put(), leaking the cell reference.
> 
> Move nvmem_cell_put() right after nvmem_cell_read() to ensure the cell
> reference is always released regardless of the read result.
> 
> Found via static analysis and code review.
> 
> Fixes: 98c485eaf509 ("net: phy: add driver for MediaTek SoC built-in GE PHYs")
> Cc: stable@...r.kernel.org
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew