linux-kernel - Re: [PATCH 1/4] tty: serial: 8250

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Date:	Mon, 4 May 2015 11:32:09 +0200
From:	Matthias Brugger <matthias.bgg@...il.com>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	linux-mediatek@...ts.infradead.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-serial@...r.kernel.org, Alan Cox <alan@...ux.intel.com>
Subject: Re: [PATCH 1/4] tty: serial: 8250_mtk: remove unnecessary test

2015-04-27 8:49 GMT+02:00 Sascha Hauer <s.hauer@...gutronix.de>:
> When the driver has probed successfully the clk pointer is always valid,
> so no need to test for it.
>
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> ---
>  drivers/tty/serial/8250/8250_mtk.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
>

Acked-by: Matthias Brugger <matthias.bgg@...il.com>

> diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c
> index 7a11fac..1297827 100644
> --- a/drivers/tty/serial/8250/8250_mtk.c
> +++ b/drivers/tty/serial/8250/8250_mtk.c
> @@ -214,10 +214,8 @@ static int mtk8250_remove(struct platform_device *pdev)
>         pm_runtime_get_sync(&pdev->dev);
>
>         serial8250_unregister_port(data->line);
> -       if (!IS_ERR(data->uart_clk)) {
> -               clk_disable_unprepare(data->uart_clk);
> -               clk_put(data->uart_clk);
> -       }
> +       clk_disable_unprepare(data->uart_clk);
> +       clk_put(data->uart_clk);
>
>         pm_runtime_disable(&pdev->dev);
>         pm_runtime_put_noidle(&pdev->dev);
> @@ -249,8 +247,7 @@ static int mtk8250_runtime_suspend(struct device *dev)
>  {
>         struct mtk8250_data *data = dev_get_drvdata(dev);
>
> -       if (!IS_ERR(data->uart_clk))
> -               clk_disable_unprepare(data->uart_clk);
> +       clk_disable_unprepare(data->uart_clk);
>
>         return 0;
>  }
> @@ -259,8 +256,7 @@ static int mtk8250_runtime_resume(struct device *dev)
>  {
>         struct mtk8250_data *data = dev_get_drvdata(dev);
>
> -       if (!IS_ERR(data->uart_clk))
> -               clk_prepare_enable(data->uart_clk);
> +       clk_prepare_enable(data->uart_clk);
>
>         return 0;
>  }
> --
> 2.1.4
>



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