linux-kernel - Re: [PATCH] soc: qcom: llcc: Name regmaps to avoid collisions

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Message-ID: <5d9d1468.1c69fb81.1bb45.193a@mx.google.com>
Date:   Tue, 08 Oct 2019 15:57:43 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Evan Green <evgreen@...omium.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Venkata Narendra Kumar Gutta <vnkgutta@...eaurora.org>
Subject: Re: [PATCH] soc: qcom: llcc: Name regmaps to avoid collisions

Quoting Evan Green (2019-10-07 14:20:47)
> On Fri, Oct 4, 2019 at 4:31 PM Stephen Boyd <swboyd@...omium.org> wrote:
> >
> > We'll end up with debugfs collisions if we don't give names to the
> > regmaps created inside this driver. Copy the template config over into
> > this function and give the regmap the same name as the resource name.
> >
> > Fixes: 7f9c136216c7 ("soc: qcom: Add broadcast base for Last Level Cache Controller (LLCC)")
> > Cc: Venkata Narendra Kumar Gutta <vnkgutta@...eaurora.org>
> > Cc: Evan Green <evgreen@...omium.org>
> > Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> > ---
> >  drivers/soc/qcom/llcc-slice.c | 14 +++++++-------
> >  1 file changed, 7 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/soc/qcom/llcc-slice.c b/drivers/soc/qcom/llcc-slice.c
> > index 9090ea12eaf3..aa342938c403 100644
> > --- a/drivers/soc/qcom/llcc-slice.c
> > +++ b/drivers/soc/qcom/llcc-slice.c
> > @@ -48,13 +48,6 @@
> >
> >  static struct llcc_drv_data *drv_data = (void *) -EPROBE_DEFER;
> >
> > -static const struct regmap_config llcc_regmap_config = {
> > -       .reg_bits = 32,
> > -       .reg_stride = 4,
> > -       .val_bits = 32,
> > -       .fast_io = true,
> > -};
> > -
> >  /**
> >   * llcc_slice_getd - get llcc slice descriptor
> >   * @uid: usecase_id for the client
> > @@ -314,6 +307,12 @@ static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev,
> >  {
> >         struct resource *res;
> >         void __iomem *base;
> > +       static struct regmap_config llcc_regmap_config = {
> > +               .reg_bits = 32,
> > +               .reg_stride = 4,
> > +               .val_bits = 32,
> > +               .fast_io = true,
> > +       };
> 
> Why did you move this to be a static local? I think it works, but it
> makes it look like this is a local variable that's possibly used out
> of scope. Maybe leave it as a global?

And have a followup patch to move it to a static local? Sounds ok to me
if you prefer.