linux-kernel - Re: [PATCH 09/15] tty: serial: qcom-geni-serial: drop the return value from handle

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Date:   Fri, 18 Nov 2022 14:28:10 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Vinod Koul <vkoul@...nel.org>, Alex Elder <elder@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-serial@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 09/15] tty: serial: qcom-geni-serial: drop the return
 value from handle_rx



On 18/11/2022 13:25, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> The return value of the handle_rx() callback is never checked. Drop it.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>   drivers/tty/serial/qcom_geni_serial.c | 14 ++++++--------
>   1 file changed, 6 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
> index 4b155ca0ac74..72d0e7b91080 100644
> --- a/drivers/tty/serial/qcom_geni_serial.c
> +++ b/drivers/tty/serial/qcom_geni_serial.c
> @@ -114,7 +114,7 @@ struct qcom_geni_serial_port {
>   	u32 tx_fifo_width;
>   	u32 rx_fifo_depth;
>   	bool setup;
> -	int (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
> +	void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
>   	unsigned int baud;
>   	void *rx_fifo;
>   	u32 loopback;
> @@ -499,7 +499,7 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s,
>   		spin_unlock_irqrestore(&uport->lock, flags);
>   }
>   
> -static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
> +static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
>   {
>   	u32 i;
>   	unsigned char buf[sizeof(u32)];
> @@ -534,16 +534,15 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
>   	}
>   	if (!drop)
>   		tty_flip_buffer_push(tport);
> -	return 0;
>   }
>   #else
> -static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
> +static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop)
>   {
> -	return -EPERM;
> +
>   }
>   #endif /* CONFIG_SERIAL_QCOM_GENI_CONSOLE */
>   
> -static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
> +static void handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
>   {
>   	struct tty_port *tport;
>   	struct qcom_geni_serial_port *port = to_dev_port(uport);
> @@ -554,7 +553,7 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
>   	tport = &uport->state->port;
>   	ioread32_rep(uport->membase + SE_GENI_RX_FIFOn, port->rx_fifo, words);
>   	if (drop)
> -		return 0;
> +		return;
>   
>   	ret = tty_insert_flip_string(tport, port->rx_fifo, bytes);
>   	if (ret != bytes) {
> @@ -564,7 +563,6 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
>   	}
>   	uport->icount.rx += ret;
>   	tty_flip_buffer_push(tport);
> -	return ret;
>   }
>   
>   static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)