linux-kernel - Re: [PATCH net-next v2 09/12] net: stmmac: Add EMAC3 variant of dwmac4

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Date:   Mon, 20 Mar 2023 20:41:53 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Andrew Halaney <ahalaney@...hat.com>
Cc:     linux-kernel@...r.kernel.org, agross@...nel.org,
        andersson@...nel.org, konrad.dybcio@...aro.org,
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        alexandre.torgue@...s.st.com, joabreu@...opsys.com,
        mcoquelin.stm32@...il.com, richardcochran@...il.com,
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        jsuraj@....qualcomm.com, hisunil@...cinc.com, echanude@...hat.com
Subject: Re: [PATCH net-next v2 09/12] net: stmmac: Add EMAC3 variant of
 dwmac4

On Mon, 20 Mar 2023 17:16:14 -0500 Andrew Halaney wrote:
> The next approach that was checked was to have a function pointer
> embedded inside a structure that does the appropriate conversion based
> on the variant that's in use. However, some of the function definitions
> are like the following:
> 
>     void emac3_set_rx_ring_len(void __iomem *ioaddr, u32 len, u32 chan)

I checked a couple of callbacks and they seem to all be called with
priv->iomem as an arg, so there is no strong reason to pass iomem
instead of priv / hw. Or at least not to pass both..

I think that's a better approach than adding the wrappers :(

Are you familiar with coccinelle / spatch? It's often better than 
just regexps for refactoring, maybe it can help?