linux-kernel - RE: [PATCH] clk: zynqmp: pll: Remove some dead code

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Date:   Mon, 3 May 2021 04:56:43 +0000
From:   Rajan Vaja <RAJANV@...inx.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        Michal Simek <michals@...inx.com>,
        "quanyang.wang@...driver.com" <quanyang.wang@...driver.com>,
        Jolly Shah <JOLLYS@...inx.com>,
        Tejas Patel <tejasp@...x.xilinx.com>,
        Shubhrajyoti Datta <shubhraj@...inx.com>
CC:     "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH] clk: zynqmp: pll: Remove some dead code

Hi,

Thanks for the patch.

> -----Original Message-----
> From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> Sent: 01 May 2021 04:55 PM
> To: mturquette@...libre.com; sboyd@...nel.org; Michal Simek
> <michals@...inx.com>; quanyang.wang@...driver.com; Rajan Vaja
> <RAJANV@...inx.com>; Jolly Shah <JOLLYS@...inx.com>; Tejas Patel
> <tejasp@...x.xilinx.com>; Shubhrajyoti Datta <shubhraj@...inx.com>
> Cc: linux-clk@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; linux-
> kernel@...r.kernel.org; kernel-janitors@...r.kernel.org; Christophe JAILLET
> <christophe.jaillet@...adoo.fr>
> Subject: [PATCH] clk: zynqmp: pll: Remove some dead code
> 
> 'clk_hw_set_rate_range()' does not return any error code and 'ret' is
> known to be 0 at this point, so this message can never be displayed.
> 
> Remove it.
> 
> Fixes: 3fde0e16d016 ("drivers: clk: Add ZynqMP clock driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
> HOWEVER, the message is about 'clk_set_rate_range()', not
> 'clk_hw_set_rate_range()'. So the message is maybe correct and the
> 'xxx_rate_range()' function incorrect.
> ---
>  drivers/clk/zynqmp/pll.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/clk/zynqmp/pll.c b/drivers/clk/zynqmp/pll.c
> index abe6afbf3407..af11e9400058 100644
> --- a/drivers/clk/zynqmp/pll.c
> +++ b/drivers/clk/zynqmp/pll.c
> @@ -331,8 +331,6 @@ struct clk_hw *zynqmp_clk_register_pll(const char *name,
> u32 clk_id,
>  	}
> 
>  	clk_hw_set_rate_range(hw, PS_PLL_VCO_MIN, PS_PLL_VCO_MAX);
> -	if (ret < 0)
> -		pr_err("%s:ERROR clk_set_rate_range failed %d\n", name, ret);
[Rajan] Instead of removing, can we get return value of clk_hw_set_rate_range() and
print in case of an error.

> 
>  	return hw;
>  }
> --
> 2.30.2