linux-kernel - Re: [PATCH 02/27] tty: mmc: sdio_uart: switch sdio

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Message-ID: <CAPDyKFqV+TqW9eWkgGsLUp68DdTFrAhgp1H0Mwc6vuV4Bw0Mnw@mail.gmail.com>
Date:   Thu, 7 Dec 2023 15:09:59 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
Cc:     gregkh@...uxfoundation.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org
Subject: Re: [PATCH 02/27] tty: mmc: sdio_uart: switch sdio_in() to return u8

On Wed, 6 Dec 2023 at 08:37, Jiri Slaby (SUSE) <jirislaby@...nel.org> wrote:
>
> sdio_in() returns a value returned from sdio_readb(). The latter returns
> u8. So should the former. Therefore, switch sdio_in() return type to u8
> and all its callers too.
>
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
> Cc: Ulf Hansson <ulf.hansson@...aro.org>
> Cc: linux-mmc@...r.kernel.org

Acked-by: Ulf Hansson <ulf.hansson@...aro.org>

> ---
>  drivers/mmc/core/sdio_uart.c | 19 ++++++++-----------
>  1 file changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/core/sdio_uart.c b/drivers/mmc/core/sdio_uart.c
> index ef38dcd3a887..a05322f15771 100644
> --- a/drivers/mmc/core/sdio_uart.c
> +++ b/drivers/mmc/core/sdio_uart.c
> @@ -178,11 +178,9 @@ static inline void sdio_uart_release_func(struct sdio_uart_port *port)
>                 sdio_release_host(port->func);
>  }
>
> -static inline unsigned int sdio_in(struct sdio_uart_port *port, int offset)
> +static inline u8 sdio_in(struct sdio_uart_port *port, int offset)
>  {
> -       unsigned char c;
> -       c = sdio_readb(port->func, port->regs_offset + offset, NULL);
> -       return c;
> +       return sdio_readb(port->func, port->regs_offset + offset, NULL);
>  }
>
>  static inline void sdio_out(struct sdio_uart_port *port, int offset, int value)
> @@ -192,8 +190,8 @@ static inline void sdio_out(struct sdio_uart_port *port, int offset, int value)
>
>  static unsigned int sdio_uart_get_mctrl(struct sdio_uart_port *port)
>  {
> -       unsigned char status;
>         unsigned int ret;
> +       u8 status;
>
>         /* FIXME: What stops this losing the delta bits and breaking
>            sdio_uart_check_modem_status ? */
> @@ -354,14 +352,13 @@ static void sdio_uart_stop_rx(struct sdio_uart_port *port)
>         sdio_out(port, UART_IER, port->ier);
>  }
>
> -static void sdio_uart_receive_chars(struct sdio_uart_port *port,
> -                                   unsigned int *status)
> +static void sdio_uart_receive_chars(struct sdio_uart_port *port, u8 *status)
>  {
> -       unsigned int ch, flag;
> +       unsigned int flag;
>         int max_count = 256;
>
>         do {
> -               ch = sdio_in(port, UART_RX);
> +               u8 ch = sdio_in(port, UART_RX);
>                 flag = TTY_NORMAL;
>                 port->icount.rx++;
>
> @@ -449,8 +446,8 @@ static void sdio_uart_transmit_chars(struct sdio_uart_port *port)
>
>  static void sdio_uart_check_modem_status(struct sdio_uart_port *port)
>  {
> -       int status;
>         struct tty_struct *tty;
> +       u8 status;
>
>         status = sdio_in(port, UART_MSR);
>
> @@ -499,7 +496,7 @@ static void sdio_uart_check_modem_status(struct sdio_uart_port *port)
>  static void sdio_uart_irq(struct sdio_func *func)
>  {
>         struct sdio_uart_port *port = sdio_get_drvdata(func);
> -       unsigned int iir, lsr;
> +       u8 iir, lsr;
>
>         /*
>          * In a few places sdio_uart_irq() is called directly instead of
> --
> 2.43.0
>