netdev - Re: [PATCH net-next 0/8] net: stmmac: hwif.c cleanups

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Message-ID: <28d91eca-28dd-4e5b-ae60-021e777ee064@bootlin.com>
Date: Fri, 24 Oct 2025 08:44:07 +0200
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: "Russell King (Oracle)" <linux@...linux.org.uk>,
 Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, linux-arm-kernel@...ts.infradead.org,
 linux-stm32@...md-mailman.stormreply.com,
 Maxime Coquelin <mcoquelin.stm32@...il.com>, netdev@...r.kernel.org,
 Paolo Abeni <pabeni@...hat.com>, Richard Cochran <richardcochran@...il.com>
Subject: Re: [PATCH net-next 0/8] net: stmmac: hwif.c cleanups

Hello Russell,

On 23/10/2025 11:36, Russell King (Oracle) wrote:
> Hi,
> 
> This series cleans up hwif.c:
> 
> - move the reading of the version information out of stmmac_hwif_init()
>   into its own function, stmmac_get_version(), storing the result in a
>   new struct.
> 
> - simplify stmmac_get_version().
> 
> - read the version register once, passing it to stmmac_get_id() and
>   stmmac_get_dev_id().
> 
> - move stmmac_get_id() and stmmac_get_dev_id() into
>   stmmac_get_version()
> 
> - define version register fields and use FIELD_GET() to decode
> 
> - start tackling the big loop in stmmac_hwif_init() - provide a
>   function, stmmac_hwif_find(), which looks up the hwif entry, thus
>   making a much smaller loop, which improves readability of this code.
> 
> - change the use of '^' to '!=' when comparing the dev_id, which is
>   what is really meant here.
> 
> - reorganise the test after calling stmmac_hwif_init() so that we
>   handle the error case in the indented code, and the success case
>   with no indent, which is the classical arrangement.
> 
>  drivers/net/ethernet/stmicro/stmmac/common.h |   3 +
>  drivers/net/ethernet/stmicro/stmmac/hwif.c   | 166 +++++++++++++++------------
>  2 files changed, 98 insertions(+), 71 deletions(-)

I didn't have the bandwidth to do a full review, however I ran tests
with this series on dwmac-socfpga and dwmac-stm32, no regressions found.

For the series,

Tested-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

Maxime