Re: [PATCH] clk: socfpga: remove set but not used variable 'rc'

[Stephen Boyd <sboyd@kernel.org>]

Quoting Yu Kuai (2021-05-13 23:22:34)
> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> drivers/clk/socfpga/clk-pll.c:83:6: warning: variable ‘rc’ set but
> not used [-Wunused-but-set-variable]
> 
> The returned value of of_clk_add_provider() is never used, and so
> can be removed.
> 
> Fixes: 97259e99bdc9 ("clk: socfpga: split clk code")
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>
> ---
>  drivers/clk/socfpga/clk-pll.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/clk/socfpga/clk-pll.c b/drivers/clk/socfpga/clk-pll.c
> index dcb573d44034..127cc849c5ee 100644
> --- a/drivers/clk/socfpga/clk-pll.c
> +++ b/drivers/clk/socfpga/clk-pll.c
> @@ -80,7 +80,6 @@ static __init struct clk_hw *__socfpga_pll_init(struct device_node *node,
>         const char *parent_name[SOCFPGA_MAX_PARENTS];
>         struct clk_init_data init;
>         struct device_node *clkmgr_np;
> -       int rc;
>         int err;
>  
>         of_property_read_u32(node, "reg", &reg);
> @@ -114,7 +113,7 @@ static __init struct clk_hw *__socfpga_pll_init(struct device_node *node,
>                 kfree(pll_clk);
>                 return ERR_PTR(err);
>         }
> -       rc = of_clk_add_provider(node, of_clk_src_simple_get, hw_clk);
> +       of_clk_add_provider(node, of_clk_src_simple_get, hw_clk);

Shouldn't we fail if of_clk_add_provider() fails? So return some sort of
error pointer and unwind allocations, etc.

>         return hw_clk;
>  }
>