linux-kernel - Re: [PATCH 14/15] tty: don't check for signal_pending() in send

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Date:   Tue, 19 Sep 2023 13:14:49 +0300 (EEST)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
cc:     gregkh@...uxfoundation.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/15] tty: don't check for signal_pending() in
 send_break()

On Tue, 19 Sep 2023, Jiri Slaby (SUSE) wrote:

> msleep_interruptible() will check on its own. So no need to do the check

For clarity:

... will check !signal_pending() on its own.

> in send_break() before calling the above.
> 
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
> ---
>  drivers/tty/tty_io.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
> index 87bb5094e0bb..24833b31b81c 100644
> --- a/drivers/tty/tty_io.c
> +++ b/drivers/tty/tty_io.c
> @@ -2484,8 +2484,7 @@ static int send_break(struct tty_struct *tty, unsigned int duration)
>  	retval = tty->ops->break_ctl(tty, -1);
>  	if (retval)
>  		goto out;
> -	if (!signal_pending(current))
> -		msleep_interruptible(duration);
> +	msleep_interruptible(duration);
>  	retval = tty->ops->break_ctl(tty, 0);
>  out:
>  	tty_write_unlock(tty);
> 

-- 
 i.