netdev - Re: [PATCH net-next 01/10] net: stmmac: rk: convert to mask-based interface mode configuration

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Message-ID: <aX6P9D99Xi4PnI2J@shell.armlinux.org.uk>
Date: Sat, 31 Jan 2026 23:27:48 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Andrew Lunn <andrew@...n.ch>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Heiko Stuebner <heiko@...ech.de>,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com, netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net-next 01/10] net: stmmac: rk: convert to mask-based
 interface mode configuration

On Sat, Jan 31, 2026 at 02:08:50PM -0800, Jakub Kicinski wrote:
> On Fri, 30 Jan 2026 11:00:14 +0000 Russell King (Oracle) wrote:
> > +	ret = rk_get_phy_intf_sel(bsp_priv->phy_iface);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	intf = ret;
> > +
> >  	ret = gmac_clk_enable(bsp_priv, true);
> >  	if (ret)
> >  		return ret;
> >  
> > +	if (bsp_priv->gmac_phy_intf_sel_mask ||
> > +	    bsp_priv->gmac_rmii_mode_mask) {
> > +		/* If defined, encode the phy_intf_sel value */
> > +		val = rk_encode_wm16(intf, bsp_priv->gmac_phy_intf_sel_mask);
> > +
> > +		/* If defined, encode the RMII mode mask setting. */
> > +		val |= rk_encode_wm16(intf == PHY_INTF_SEL_RMII,
> > +				      bsp_priv->gmac_rmii_mode_mask);
> > +
> > +		ret = regmap_write(bsp_priv->grf, bsp_priv->gmac_grf_reg, val);
> > +		if (ret < 0)
> 
> missing
> 	gmac_clk_enable(bsp_priv, false);
> here?

Opinions vary on whether errors from regmap_write() should be handled.
See the recent thread:

https://lore.kernel.org/r/aXh9lcfw6D6KouI_@stanley.mountain

Seems that if regmap_write() fails, it's "buy a new computer" realms.
If that's case, is it worth cleaning up resources, or even checking the
return code from regmap_write() ?

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