linux-kernel - Re: [PATCH net-next v3 4/7] net: dsa: mt7530: move XTAL check to mt7530

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Date: Fri, 2 Feb 2024 18:39:18 +0000
From: Daniel Golle <daniel@...rotopia.org>
To: Arınç ÜNAL <arinc.unal@...nc9.com>
Cc: "Russell King (Oracle)" <linux@...linux.org.uk>,
	DENG Qingfang <dqfext@...il.com>,
	Sean Wang <sean.wang@...iatek.com>, Andrew Lunn <andrew@...n.ch>,
	Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"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>,
	mithat.guner@...ont.com, erkin.bozoglu@...ont.com,
	Bartel Eerdekens <bartel.eerdekens@...stell8.be>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH net-next v3 4/7] net: dsa: mt7530: move XTAL check to
 mt7530_setup()

On Fri, Feb 02, 2024 at 09:16:02PM +0300, Arınç ÜNAL wrote:
> On 2.02.2024 14:48, Russell King (Oracle) wrote:
> > On Fri, Feb 02, 2024 at 12:19:10PM +0300, Arınç ÜNAL via B4 Relay wrote:
> > > From: Arınç ÜNAL <arinc.unal@...nc9.com>
> > > 
> > > The crystal frequency concerns the switch core. The frequency should be
> > > checked when the switch is being set up so the driver can reject the
> > > unsupported hardware earlier and without requiring port 6 to be used.
> > > 
> > > Move it to mt7530_setup(). Drop the unnecessary function printing.
> > > 
> > > Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> > > Reviewed-by: Andrew Lunn <andrew@...n.ch>
> > > Reviewed-by: Vladimir Oltean <olteanv@...il.com>
> > 
> > I would prefer this to be earlier in the series, before patch 2 which
> > moves mt7530_setup_port6() to be called from mac_config(). mac_config()
> > is supposed to be configuration error-free - in other words, all state
> > should have been checked before hand.
> 
> I agree but mt7530_mac_config() is not a void function yet. The
> mac_port_config member of the mt753x_info structure points to this
> function. My next patch series gets rid of all useless error returns on the
> phylink path and change mac_port_config to void. So I don't think working
> on this patch series further will worth the effort. I'd rather have this
> version applied as is.

I agree regarding not changing the patch itself, but I also agree
with Russell regarding the patch ordering. I know it's a 10-minute
git headache to rebase the patches on top of each other in a different
order, but you can easily compare the end result being identical to
what you had before and hence don't need to retest.