linux-kernel - Re: [PATCH] serial: meson: remove redundant initialization of variable id

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Date:   Mon, 26 Apr 2021 08:18:53 -0700
From:   Kevin Hilman <khilman@...libre.com>
To:     Colin King <colin.king@...onical.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] serial: meson: remove redundant initialization of
 variable id

Colin King <colin.king@...onical.com> writes:

> From: Colin Ian King <colin.king@...onical.com>
>
> The variable id being initialized with a value that is never read
> and it is being updated later with a new value. The initialization is
> redundant and can be removed. Since id is just being used in a for-loop
> inside a local scope, move the declaration of id to that scope.
>
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

Reviewed-by: Kevin Hilman <khilman@...libre.com>

> ---
>  drivers/tty/serial/meson_uart.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
> index 529cd0289056..d7f55031b2cf 100644
> --- a/drivers/tty/serial/meson_uart.c
> +++ b/drivers/tty/serial/meson_uart.c
> @@ -716,12 +716,13 @@ static int meson_uart_probe(struct platform_device *pdev)
>  	struct resource *res_mem, *res_irq;
>  	struct uart_port *port;
>  	int ret = 0;
> -	int id = -1;
>  
>  	if (pdev->dev.of_node)
>  		pdev->id = of_alias_get_id(pdev->dev.of_node, "serial");
>  
>  	if (pdev->id < 0) {
> +		int id;
> +
>  		for (id = AML_UART_PORT_OFFSET; id < AML_UART_PORT_NUM; id++) {
>  			if (!meson_ports[id]) {
>  				pdev->id = id;
> -- 
> 2.30.2