linux-kernel - Re: [PATCH 04/27] tty: make tty_operations::send

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Message-ID: <CAPDyKFo=X+ESxuYov1TDvLEWk1XCSU2o98=+5Y8LvHWr2nKF6Q@mail.gmail.com>
Date:   Thu, 7 Dec 2023 15:09:21 +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, Karsten Keil <isdn@...ux-pingi.de>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        netdev@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-bluetooth@...r.kernel.org
Subject: Re: [PATCH 04/27] tty: make tty_operations::send_xchar accept u8 char

On Wed, 6 Dec 2023 at 08:37, Jiri Slaby (SUSE) <jirislaby@...nel.org> wrote:
>
> tty_operations::send_xchar is one of the last users of 'char' type for
> characters in the tty layer. Convert it to u8 now.
>
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
> Cc: Karsten Keil <isdn@...ux-pingi.de>
> Cc: Ulf Hansson <ulf.hansson@...aro.org>
> Cc: Marcel Holtmann <marcel@...tmann.org>
> Cc: Johan Hedberg <johan.hedberg@...il.com>
> Cc: Luiz Augusto von Dentz <luiz.dentz@...il.com>
> Cc: netdev@...r.kernel.org
> Cc: linux-mmc@...r.kernel.org
> Cc: linux-bluetooth@...r.kernel.org

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

Kind regards
Uffe

> ---
>  drivers/isdn/capi/capi.c         | 4 ++--
>  drivers/mmc/core/sdio_uart.c     | 2 +-
>  drivers/tty/amiserial.c          | 2 +-
>  drivers/tty/serial/serial_core.c | 2 +-
>  drivers/tty/tty_io.c             | 2 +-
>  include/linux/tty.h              | 2 +-
>  include/linux/tty_driver.h       | 4 ++--
>  net/bluetooth/rfcomm/tty.c       | 2 +-
>  8 files changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
> index 2f3789515445..6e80d7bd3c4d 100644
> --- a/drivers/isdn/capi/capi.c
> +++ b/drivers/isdn/capi/capi.c
> @@ -1231,9 +1231,9 @@ static void capinc_tty_hangup(struct tty_struct *tty)
>         tty_port_hangup(&mp->port);
>  }
>
> -static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
> +static void capinc_tty_send_xchar(struct tty_struct *tty, u8 ch)
>  {
> -       pr_debug("capinc_tty_send_xchar(%d)\n", ch);
> +       pr_debug("capinc_tty_send_xchar(%u)\n", ch);
>  }
>
>  static const struct tty_operations capinc_ops = {
> diff --git a/drivers/mmc/core/sdio_uart.c b/drivers/mmc/core/sdio_uart.c
> index a05322f15771..370fadf1d6d1 100644
> --- a/drivers/mmc/core/sdio_uart.c
> +++ b/drivers/mmc/core/sdio_uart.c
> @@ -792,7 +792,7 @@ static unsigned int sdio_uart_chars_in_buffer(struct tty_struct *tty)
>         return kfifo_len(&port->xmit_fifo);
>  }
>
> -static void sdio_uart_send_xchar(struct tty_struct *tty, char ch)
> +static void sdio_uart_send_xchar(struct tty_struct *tty, u8 ch)
>  {
>         struct sdio_uart_port *port = tty->driver_data;
>
> diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
> index a80f059f77bf..a30dc054ffbf 100644
> --- a/drivers/tty/amiserial.c
> +++ b/drivers/tty/amiserial.c
> @@ -811,7 +811,7 @@ static void rs_flush_buffer(struct tty_struct *tty)
>   * This function is used to send a high-priority XON/XOFF character to
>   * the device
>   */
> -static void rs_send_xchar(struct tty_struct *tty, char ch)
> +static void rs_send_xchar(struct tty_struct *tty, u8 ch)
>  {
>         struct serial_state *info = tty->driver_data;
>          unsigned long flags;
> diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
> index 0393853b9947..80085b151b34 100644
> --- a/drivers/tty/serial/serial_core.c
> +++ b/drivers/tty/serial/serial_core.c
> @@ -687,7 +687,7 @@ EXPORT_SYMBOL_GPL(uart_xchar_out);
>   * This function is used to send a high-priority XON/XOFF character to
>   * the device
>   */
> -static void uart_send_xchar(struct tty_struct *tty, char ch)
> +static void uart_send_xchar(struct tty_struct *tty, u8 ch)
>  {
>         struct uart_state *state = tty->driver_data;
>         struct uart_port *port;
> diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
> index 005d91c63707..6a502110da61 100644
> --- a/drivers/tty/tty_io.c
> +++ b/drivers/tty/tty_io.c
> @@ -1149,7 +1149,7 @@ ssize_t redirected_tty_write(struct kiocb *iocb, struct iov_iter *iter)
>   *
>   * Locking: none for xchar method, write ordering for write method.
>   */
> -int tty_send_xchar(struct tty_struct *tty, char ch)
> +int tty_send_xchar(struct tty_struct *tty, u8 ch)
>  {
>         bool was_stopped = tty->flow.stopped;
>
> diff --git a/include/linux/tty.h b/include/linux/tty.h
> index e96c85f4f91e..d3bedcc08738 100644
> --- a/include/linux/tty.h
> +++ b/include/linux/tty.h
> @@ -410,7 +410,7 @@ void tty_wait_until_sent(struct tty_struct *tty, long timeout);
>  void stop_tty(struct tty_struct *tty);
>  void start_tty(struct tty_struct *tty);
>  void tty_write_message(struct tty_struct *tty, char *msg);
> -int tty_send_xchar(struct tty_struct *tty, char ch);
> +int tty_send_xchar(struct tty_struct *tty, u8 ch);
>  int tty_put_char(struct tty_struct *tty, unsigned char c);
>  unsigned int tty_chars_in_buffer(struct tty_struct *tty);
>  unsigned int tty_write_room(struct tty_struct *tty);
> diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
> index f428c1b784a2..7372124fbf90 100644
> --- a/include/linux/tty_driver.h
> +++ b/include/linux/tty_driver.h
> @@ -242,7 +242,7 @@ struct serial_struct;
>   *     Optional: If not provided, the device is assumed to have no FIFO.
>   *     Usually correct to invoke via tty_wait_until_sent(). May sleep.
>   *
> - * @send_xchar: ``void ()(struct tty_struct *tty, char ch)``
> + * @send_xchar: ``void ()(struct tty_struct *tty, u8 ch)``
>   *
>   *     This routine is used to send a high-priority XON/XOFF character (@ch)
>   *     to the @tty device.
> @@ -374,7 +374,7 @@ struct tty_operations {
>         void (*flush_buffer)(struct tty_struct *tty);
>         void (*set_ldisc)(struct tty_struct *tty);
>         void (*wait_until_sent)(struct tty_struct *tty, int timeout);
> -       void (*send_xchar)(struct tty_struct *tty, char ch);
> +       void (*send_xchar)(struct tty_struct *tty, u8 ch);
>         int (*tiocmget)(struct tty_struct *tty);
>         int (*tiocmset)(struct tty_struct *tty,
>                         unsigned int set, unsigned int clear);
> diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
> index 94ec913dfb76..69c75c041fe1 100644
> --- a/net/bluetooth/rfcomm/tty.c
> +++ b/net/bluetooth/rfcomm/tty.c
> @@ -1041,7 +1041,7 @@ static void rfcomm_tty_flush_buffer(struct tty_struct *tty)
>         tty_wakeup(tty);
>  }
>
> -static void rfcomm_tty_send_xchar(struct tty_struct *tty, char ch)
> +static void rfcomm_tty_send_xchar(struct tty_struct *tty, u8 ch)
>  {
>         BT_DBG("tty %p ch %c", tty, ch);
>  }
> --
> 2.43.0
>