linux-kernel - Re: [PATCH v5 1/2] serial: core: Update uart_poll_timeout() function to return unsigned long

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Date:   Mon, 30 Oct 2023 11:25:37 +0200 (EET)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     Vamshi Gajjela <vamshigajjela@...gle.com>
cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        ilpo.jarvinen@...ux.intel.com, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, manugautam@...gle.com,
        Subhash Jadavani <sjadavani@...gle.com>,
        Channa Kadabi <kadabi@...gle.com>
Subject: Re: [PATCH v5 1/2] serial: core: Update uart_poll_timeout() function
 to return unsigned long

On Mon, 30 Oct 2023, Vamshi Gajjela wrote:

> The function uart_fifo_timeout() returns an unsigned long value, which
> is the number of jiffies. Therefore, change the variable timeout in the
> function uart_poll_timeout() from int to unsigned long.
> Change the return type of the function uart_poll_timeout() from int to
> unsigned long to be consistent with the type of timeout values.
> 
> Signed-off-by: Vamshi Gajjela <vamshigajjela@...gle.com>
> ---
> v5:
> - no change. Consistent version for series
> v4:
> - author name in capitals to lowercase
> v3:
> - updated description
> v2:
> - unsigned long instead of unsigned int
> - added () after function name in short log
> - updated description
> 
>  include/linux/serial_core.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
> index bb6f073bc159..6916a1d7e477 100644
> --- a/include/linux/serial_core.h
> +++ b/include/linux/serial_core.h
> @@ -773,9 +773,9 @@ static inline unsigned long uart_fifo_timeout(struct uart_port *port)
>  }
>  
>  /* Base timer interval for polling */
> -static inline int uart_poll_timeout(struct uart_port *port)
> +static inline unsigned long uart_poll_timeout(struct uart_port *port)
>  {
> -	int timeout = uart_fifo_timeout(port);
> +	unsigned long timeout = uart_fifo_timeout(port);
>  
>  	return timeout > 6 ? (timeout / 2 - 2) : 1;
>  }
> 

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

-- 
 i.