linux-kernel - Re: [PATCH v2 4/4] clk: pmc-atom: use devm_kstrdup

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Message-ID: <20180920163928.GI1367@tuxbook-pro>
Date:   Thu, 20 Sep 2018 09:39:28 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Arend van Spriel <aspriel@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Robin Murphy <robin.murphy@....com>,
        Joe Perches <joe@...ches.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Michal Hocko <mhocko@...e.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Jonathan Corbet <corbet@....net>, Roman Gushchin <guro@...com>,
        Huang Ying <ying.huang@...el.com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 4/4] clk: pmc-atom: use devm_kstrdup_const()

On Tue 28 Aug 02:33 PDT 2018, Bartosz Golaszewski wrote:

> Use devm_kstrdup_const() in the pmc-atom driver. This mostly serves as
> an example of how to use this new routine to shrink driver code.
> 
> While we're at it: replace a call to kcalloc() with devm_kcalloc().
> 
> Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

Regards,
Bjorn

> ---
>  drivers/clk/x86/clk-pmc-atom.c | 19 ++++---------------
>  1 file changed, 4 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/clk/x86/clk-pmc-atom.c b/drivers/clk/x86/clk-pmc-atom.c
> index 08ef69945ffb..daa2192e6568 100644
> --- a/drivers/clk/x86/clk-pmc-atom.c
> +++ b/drivers/clk/x86/clk-pmc-atom.c
> @@ -253,14 +253,6 @@ static void plt_clk_unregister_fixed_rate_loop(struct clk_plt_data *data,
>  		plt_clk_unregister_fixed_rate(data->parents[i]);
>  }
>  
> -static void plt_clk_free_parent_names_loop(const char **parent_names,
> -					   unsigned int i)
> -{
> -	while (i--)
> -		kfree_const(parent_names[i]);
> -	kfree(parent_names);
> -}
> -
>  static void plt_clk_unregister_loop(struct clk_plt_data *data,
>  				    unsigned int i)
>  {
> @@ -286,8 +278,8 @@ static const char **plt_clk_register_parents(struct platform_device *pdev,
>  	if (!data->parents)
>  		return ERR_PTR(-ENOMEM);
>  
> -	parent_names = kcalloc(nparents, sizeof(*parent_names),
> -			       GFP_KERNEL);
> +	parent_names = devm_kcalloc(&pdev->dev, nparents,
> +				    sizeof(*parent_names), GFP_KERNEL);
>  	if (!parent_names)
>  		return ERR_PTR(-ENOMEM);
>  
> @@ -300,7 +292,8 @@ static const char **plt_clk_register_parents(struct platform_device *pdev,
>  			err = PTR_ERR(data->parents[i]);
>  			goto err_unreg;
>  		}
> -		parent_names[i] = kstrdup_const(clks[i].name, GFP_KERNEL);
> +		parent_names[i] = devm_kstrdup_const(&pdev->dev,
> +						     clks[i].name, GFP_KERNEL);
>  	}
>  
>  	data->nparents = nparents;
> @@ -308,7 +301,6 @@ static const char **plt_clk_register_parents(struct platform_device *pdev,
>  
>  err_unreg:
>  	plt_clk_unregister_fixed_rate_loop(data, i);
> -	plt_clk_free_parent_names_loop(parent_names, i);
>  	return ERR_PTR(err);
>  }
>  
> @@ -351,15 +343,12 @@ static int plt_clk_probe(struct platform_device *pdev)
>  		goto err_unreg_clk_plt;
>  	}
>  
> -	plt_clk_free_parent_names_loop(parent_names, data->nparents);
> -
>  	platform_set_drvdata(pdev, data);
>  	return 0;
>  
>  err_unreg_clk_plt:
>  	plt_clk_unregister_loop(data, i);
>  	plt_clk_unregister_parents(data);
> -	plt_clk_free_parent_names_loop(parent_names, data->nparents);
>  	return err;
>  }
>  
> -- 
> 2.18.0
>