linux-kernel - Re: [PATCH] tty: metag_da: Convert timers to use timer

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Message-ID: <20171017121226.GN15235@jhogan-linux>
Date:   Tue, 17 Oct 2017 13:12:27 +0100
From:   James Hogan <james.hogan@...s.com>
To:     Kees Cook <keescook@...omium.org>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>, <linux-metag@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tty: metag_da: Convert timers to use timer_setup()

On Mon, Oct 16, 2017 at 04:28:36PM -0700, Kees Cook wrote:
> In preparation for unconditionally passing the struct timer_list pointer to
> all timer callbacks, switch to using the new timer_setup() and from_timer()
> to pass the timer pointer explicitly.
> 
> Cc: James Hogan <james.hogan@...tec.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Jiri Slaby <jslaby@...e.com>
> Cc: linux-metag@...r.kernel.org
> Signed-off-by: Kees Cook <keescook@...omium.org>

Looks good to me and seems to work.

Acked-by: James Hogan <jhogan@...nel.org>

Cheers
James

> ---
>  drivers/tty/metag_da.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/tty/metag_da.c b/drivers/tty/metag_da.c
> index 25ccef2fe748..82ccf3982b25 100644
> --- a/drivers/tty/metag_da.c
> +++ b/drivers/tty/metag_da.c
> @@ -309,7 +309,7 @@ static int put_data(void *arg)
>  /*
>   *	This gets called every DA_TTY_POLL and polls the channels for data
>   */
> -static void dashtty_timer(unsigned long ignored)
> +static void dashtty_timer(struct timer_list *poll_timer)
>  {
>  	int channel;
>  
> @@ -323,12 +323,12 @@ static void dashtty_timer(unsigned long ignored)
>  	if (channel >= 0)
>  		fetch_data(channel);
>  
> -	mod_timer(&poll_timer, jiffies + DA_TTY_POLL);
> +	mod_timer(poll_timer, jiffies + DA_TTY_POLL);
>  }
>  
>  static void add_poll_timer(struct timer_list *poll_timer)
>  {
> -	setup_pinned_timer(poll_timer, dashtty_timer, 0);
> +	timer_setup(poll_timer, dashtty_timer, TIMER_PINNED);
>  	poll_timer->expires = jiffies + DA_TTY_POLL;
>  
>  	/*
> @@ -461,7 +461,7 @@ static void dashtty_hangup(struct tty_struct *tty)
>   * buffers. It is used to delay the expensive writeout until the writer has
>   * stopped writing.
>   */
> -static void dashtty_put_timer(unsigned long ignored)
> +static void dashtty_put_timer(struct timer_list *unused)
>  {
>  	if (atomic_read(&dashtty_xmit_cnt))
>  		wake_up_interruptible(&dashtty_waitqueue);
> @@ -603,7 +603,7 @@ static int __init dashtty_init(void)
>  		complete(&dport->xmit_empty);
>  	}
>  
> -	setup_timer(&put_timer, dashtty_put_timer, 0);
> +	timer_setup(&put_timer, dashtty_put_timer, 0);
>  
>  	init_waitqueue_head(&dashtty_waitqueue);
>  	dashtty_thread = kthread_create(put_data, NULL, "ttyDA");
> -- 
> 2.7.4
> 
> 
> -- 
> Kees Cook
> Pixel Security

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