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SubjectRe: [PATCH 1/2] clk: s2mps11: remove redundant variable
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On 18.01.2016 17:25, Andi Shyti wrote:
> In the probe function the s2mps11_clk pointer is used only to
> iterate through the s2mps11_clks. The naming itself brings
> confusion and the readability is not improved.
>
> Remove it, save some memory and headaches due to name similarity.

Moving the declaration of 's2mps11_clk' into the for-loop could be also
a way of improving the readability (narrow scope of variable) but your
approach also looks fine.

Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

Best regards,
Krzysztof

>
> Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
> ---
> drivers/clk/clk-s2mps11.c | 36 +++++++++++++++++-------------------
> 1 file changed, 17 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/clk/clk-s2mps11.c b/drivers/clk/clk-s2mps11.c
> index d266299..ccb12f1 100644
> --- a/drivers/clk/clk-s2mps11.c
> +++ b/drivers/clk/clk-s2mps11.c
> @@ -28,7 +28,7 @@
> #include <linux/mfd/samsung/s5m8767.h>
> #include <linux/mfd/samsung/core.h>
>
> -#define s2mps11_name(a) (a->hw.init->name)
> +#define s2mps11_name(a) (a.hw.init->name)
>
> static struct clk **clk_table;
> static struct clk_onecell_data clk_data;
> @@ -177,18 +177,16 @@ static struct device_node *s2mps11_clk_parse_dt(struct platform_device *pdev,
> static int s2mps11_clk_probe(struct platform_device *pdev)
> {
> struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
> - struct s2mps11_clk *s2mps11_clks, *s2mps11_clk;
> + struct s2mps11_clk *s2mps11_clks;
> unsigned int s2mps11_reg;
> struct clk_init_data *clks_init;
> int i, ret = 0;
>
> s2mps11_clks = devm_kcalloc(&pdev->dev, S2MPS11_CLKS_NUM,
> - sizeof(*s2mps11_clk), GFP_KERNEL);
> + sizeof(*s2mps11_clks), GFP_KERNEL);
> if (!s2mps11_clks)
> return -ENOMEM;
>
> - s2mps11_clk = s2mps11_clks;
> -
> clk_table = devm_kcalloc(&pdev->dev, S2MPS11_CLKS_NUM,
> sizeof(struct clk *), GFP_KERNEL);
> if (!clk_table)
> @@ -221,26 +219,26 @@ static int s2mps11_clk_probe(struct platform_device *pdev)
> if (IS_ERR(s2mps11_clks->clk_np))
> return PTR_ERR(s2mps11_clks->clk_np);
>
> - for (i = 0; i < S2MPS11_CLKS_NUM; i++, s2mps11_clk++) {
> + for (i = 0; i < S2MPS11_CLKS_NUM; i++) {
> if (!clks_init[i].name)
> continue; /* Skip clocks not present in some devices */
> - s2mps11_clk->iodev = iodev;
> - s2mps11_clk->hw.init = &clks_init[i];
> - s2mps11_clk->mask = 1 << i;
> - s2mps11_clk->reg = s2mps11_reg;
> -
> - s2mps11_clk->clk = devm_clk_register(&pdev->dev,
> - &s2mps11_clk->hw);
> - if (IS_ERR(s2mps11_clk->clk)) {
> + s2mps11_clks[i].iodev = iodev;
> + s2mps11_clks[i].hw.init = &clks_init[i];
> + s2mps11_clks[i].mask = 1 << i;
> + s2mps11_clks[i].reg = s2mps11_reg;
> +
> + s2mps11_clks[i].clk = devm_clk_register(&pdev->dev,
> + &s2mps11_clks[i].hw);
> + if (IS_ERR(s2mps11_clks[i].clk)) {
> dev_err(&pdev->dev, "Fail to register : %s\n",
> - s2mps11_name(s2mps11_clk));
> - ret = PTR_ERR(s2mps11_clk->clk);
> + s2mps11_name(s2mps11_clks[i]));
> + ret = PTR_ERR(s2mps11_clks[i].clk);
> goto err_reg;
> }
>
> - s2mps11_clk->lookup = clkdev_create(s2mps11_clk->clk,
> - s2mps11_name(s2mps11_clk), NULL);
> - if (!s2mps11_clk->lookup) {
> + s2mps11_clks[i].lookup = clkdev_create(s2mps11_clks[i].clk,
> + s2mps11_name(s2mps11_clks[i]), NULL);
> + if (!s2mps11_clks[i].lookup) {
> ret = -ENOMEM;
> goto err_reg;
> }
>


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