linux-kernel - Re: [PATCH net-next 2/2] net: stmmac: dwmac-starfive: remove unnecessary clk_get

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Message-ID: <CANBLGcwFW_Y4PC1hxJ7OQN-h025e5wwoCNwnk8OXh3ALFQPcXg@mail.gmail.com>
Date:   Sun, 27 Aug 2023 19:33:10 +0200
From:   Emil Renner Berthing <kernel@...il.dk>
To:     Jisheng Zhang <jszhang@...nel.org>
Cc:     Samin Guo <samin.guo@...rfivetech.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/2] net: stmmac: dwmac-starfive: remove
 unnecessary clk_get_rate()

On Sun, 27 Aug 2023 at 15:53, Jisheng Zhang <jszhang@...nel.org> wrote:
>
> In starfive_dwmac_fix_mac_speed(), the rate gotten by clk_get_rate()
> is not necessary, remove the clk_get_rate() calling.

Thanks. I suggested this change during the initial review, but someone
wanted the code as it is. I must admit I don't understand why, so
Reviewed-by: Emil Renner Berthing <emil.renner.berthing@...onical.com>

> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
> index b68f42795eaa..422138ef565e 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
> @@ -30,8 +30,6 @@ static void starfive_dwmac_fix_mac_speed(void *priv, unsigned int speed, unsigne
>         unsigned long rate;
>         int err;
>
> -       rate = clk_get_rate(dwmac->clk_tx);
> -
>         switch (speed) {
>         case SPEED_1000:
>                 rate = 125000000;
> @@ -44,7 +42,7 @@ static void starfive_dwmac_fix_mac_speed(void *priv, unsigned int speed, unsigne
>                 break;
>         default:
>                 dev_err(dwmac->dev, "invalid speed %u\n", speed);
> -               break;
> +               return;
>         }
>
>         err = clk_set_rate(dwmac->clk_tx, rate);
> --
> 2.40.1
>