linux-kernel - Re: [PATCH v6 3/6] interconnect: icc-clk: Add devm_icc_clk

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Date: Tue, 2 Apr 2024 15:12:04 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Varadarajan Narayanan <quic_varada@...cinc.com>
Cc: andersson@...nel.org, konrad.dybcio@...aro.org, mturquette@...libre.com, 
	sboyd@...nel.org, robh@...nel.org, krzysztof.kozlowski+dt@...aro.org, 
	conor+dt@...nel.org, djakov@...nel.org, quic_anusha@...cinc.com, 
	linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-pm@...r.kernel.org
Subject: Re: [PATCH v6 3/6] interconnect: icc-clk: Add devm_icc_clk_register

On Tue, 2 Apr 2024 at 14:23, Varadarajan Narayanan
<quic_varada@...cinc.com> wrote:
>
> On Tue, Apr 02, 2024 at 02:16:56PM +0300, Dmitry Baryshkov wrote:
> > On Tue, 2 Apr 2024 at 14:02, Varadarajan Narayanan
> > <quic_varada@...cinc.com> wrote:
> > >
> > > On Tue, Apr 02, 2024 at 01:48:08PM +0300, Dmitry Baryshkov wrote:
> > > > On Tue, 2 Apr 2024 at 13:40, Dmitry Baryshkov
> > > > <dmitry.baryshkov@...aro.org> wrote:
> > > > >
> > > > > On Tue, 2 Apr 2024 at 13:34, Varadarajan Narayanan
> > > > > <quic_varada@...cinc.com> wrote:
> > > > > >
> > > > > > Wrap icc_clk_register to create devm_icc_clk_register to be
> > > > > > able to release the resources properly.
> > > > > >
> > > > > > Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> > > > > > ---
> > > > > > v5: Introduced devm_icc_clk_register
> > > > > > ---
> > > > > >  drivers/interconnect/icc-clk.c   | 29 +++++++++++++++++++++++++++++
> > > > > >  include/linux/interconnect-clk.h |  4 ++++
> > > > > >  2 files changed, 33 insertions(+)
> > > > >
> > > > > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > > >
> > > > Wait. Actually,
> > > >
> > > > Unreviewed-by: me
> > > >
> > > > Please return int from devm_icc_clk_register instead of returning the pointer.
> > >
> > > Wouldn't returning int break the general assumption that
> > > devm_foo(), returns the same type as foo(). For example
> > > devm_clk_hw_get_clk and clk_hw_get_clk return struct clk *?
> >
> > Not always. The only reason to return icc_provider was to make it
> > possible to destroy it. With devres-managed function you don't have to
> > do anything.
>
> Ok. Will change as follows
>
>         return prov; -> return PTR_ERR_OR_ZERO(prov);
>

I think the code might become simpler if you first allocate the ICC
provider and then just 'return devm_add_action_or_reset(dev,
your_icc_clk_release, provider)'


-- 
With best wishes
Dmitry