linux-kernel - Re: [PATCH 4/6] phy: qualcomm: phy-qcom-qmp-ufs: Move data structs and setting tables to header

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Message-ID: <CAA8EJpoqRBxS7HJrFdRAvv677hKJw+d_K+fN_4ABDrj+68r28w@mail.gmail.com>
Date:   Wed, 20 Sep 2023 01:30:21 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Manivannan Sadhasivam <mani@...nel.org>
Cc:     Can Guo <quic_cang@...cinc.com>, quic_nguyenb@...cinc.com,
        quic_nitirawa@...cinc.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@...r.kernel.org>,
        "open list:GENERIC PHY FRAMEWORK" <linux-phy@...ts.infradead.org>
Subject: Re: [PATCH 4/6] phy: qualcomm: phy-qcom-qmp-ufs: Move data structs
 and setting tables to header

On Tue, 19 Sept 2023 at 15:15, Manivannan Sadhasivam <mani@...nel.org> wrote:
>
> On Thu, Sep 14, 2023 at 03:28:59PM +0300, Dmitry Baryshkov wrote:
> > On Mon, 11 Sept 2023 at 09:01, Can Guo <quic_cang@...cinc.com> wrote:
> > >
> > > To make the code more readable, move the data structs and PHY settting
> > > tables to a header file, namely the phy-qcom-qmp-ufs.h.
> > >
> > > Signed-off-by: Can Guo <quic_cang@...cinc.com>
> > > ---
> > >  drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 802 +------------------------------
> > >  drivers/phy/qualcomm/phy-qcom-qmp-ufs.h | 805 ++++++++++++++++++++++++++++++++
> > >  2 files changed, 806 insertions(+), 801 deletions(-)
> > >  create mode 100644 drivers/phy/qualcomm/phy-qcom-qmp-ufs.h
> >
> > Is there any reason to do so? Other than just moving stuff around, it
> > doesn't give us anything. This header will not be shared with any
> > other driver. Just moving data tables to the header (ugh, static data
> > in the header) doesn't make code more readable.
> >
>
> I think the motive here is to move the static tables to one file and have the
> rest of the code in another. Because, the static tables itself occupy 1.2k LoC
> now and it is going to grow. So let's keep them in a single file to avoid mixing
> it with rest of the driver code.

My 2c is that this is mostly useless. The headers are for sharing, not
for moving the data out of the .c files. Not to mention that the
driver code comes after the tables.
I'd really suggest starting such a move with separating common parts
of all the QMP drivers.

>
> - Mani
>
> > If you really would like to clean up the QMP drivers, please consider
> > splitting _common_ parts. But at this point I highly doubt that it is
> > possible in a useful way.


-- 
With best wishes
Dmitry