[PATCH] serial: meson: remove redundant initialization of variable id

[PATCH] serial: meson: remove redundant initialization of variable id

[Colin King]

From: Colin Ian King <colin.king@canonical.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@canonical.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

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

[Kevin Hilman]

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

> From: Colin Ian King <colin.king@canonical.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@canonical.com>

Reviewed-by: Kevin Hilman <khilman@baylibre.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

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

[Martin Blumenstingl]

On Mon, Apr 26, 2021 at 12:11 PM Colin King <colin.king@canonical.com> wrote:
>
> From: Colin Ian King <colin.king@canonical.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@canonical.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>