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From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Christophe Roullier <christophe.roullier@foss.st.com>,
	Linus Walleij <linusw@kernel.org>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>,
	"David S . Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Maxime Chevallier <maxime.chevallier@bootlin.com>,
	Vladimir Oltean <vladimir.oltean@nxp.com>,
	netdev@vger.kernel.org, linux-gpio@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] net: stmmac: restore pinctrl when driver remove.
Date: Wed, 18 Feb 2026 08:55:11 +0000	[thread overview]
Message-ID: <aZV-b6TdLMdI8dm4@shell.armlinux.org.uk> (raw)
In-Reply-To: <20260218083618.67805-3-christophe.roullier@foss.st.com>

On Wed, Feb 18, 2026 at 09:36:17AM +0100, Christophe Roullier wrote:
> when system suspend or unbind, need to set pins
> to low power state to save IO power consumption.
> 
> Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> index 067b17f03cd09..3d4f0e4cb53fb 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
> @@ -8071,6 +8071,9 @@ void stmmac_dvr_remove(struct device *dev)
>  	mutex_destroy(&priv->lock);
>  	bitmap_free(priv->af_xdp_zc_qps);
>  
> +	/* Select sleep pin state */
> +	pinctrl_pm_select_sleep_state(dev);
> +

I'm not convinced this is correct, there's nothing to match it in the
probe function, except what the driver model core does. However, the
driver model core also doesn't clean up the state if probe fails.

Adding LinusW for comment.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!

  reply	other threads:[~2026-02-18  8:55 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-18  8:36 [PATCH 0/3] Fixes for stmmac driver Christophe Roullier
2026-02-18  8:36 ` [PATCH 1/3] net: stmmac: fix pinctrl management during suspend/resume Christophe Roullier
2026-02-18  8:48   ` Russell King (Oracle)
2026-02-18  8:36 ` [PATCH 2/3] net: stmmac: restore pinctrl when driver remove Christophe Roullier
2026-02-18  8:55   ` Russell King (Oracle) [this message]
2026-02-19 19:11     ` Linus Walleij
2026-02-19 19:25       ` Russell King (Oracle)
2026-02-19 22:20         ` Linus Walleij
2026-02-18  8:36 ` [PATCH 3/3] net: stmmac: manage error case during stmmac_dvr_probe Christophe Roullier
2026-02-18  8:50   ` Russell King (Oracle)

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