Re: [Xen-devel] [PATCH 7/8] ns16550: command line parsing adjustments

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 11/09/12 11:20, Jan Beulich wrote:
> Allow intermediate parts of the command line options to be absent
> (expressed by two immediately succeeding commas).
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Can you also update com{1,2} in the docs to reflect this?

>
> --- a/xen/drivers/char/ns16550.c
> +++ b/xen/drivers/char/ns16550.c
> @@ -556,26 +556,23 @@ static void __init ns16550_parse_port_co
>      else if ( (baud = simple_strtoul(conf, &conf, 10)) != 0 )
>          uart->baud = baud;
>  
> -    if ( *conf == '/')
> +    if ( *conf == '/' )
>      {
>          conf++;
>          uart->clock_hz = simple_strtoul(conf, &conf, 0) << 4;
>      }
>  
> -    if ( *conf != ',' )
> -        goto config_parsed;
> -    conf++;
> -
> -    uart->data_bits = simple_strtoul(conf, &conf, 10);
> +    if ( *conf == ',' && *++conf != ',' )
> +    {
> +        uart->data_bits = simple_strtoul(conf, &conf, 10);
>  
> -    uart->parity = parse_parity_char(*conf);
> -    conf++;
> +        uart->parity = parse_parity_char(*conf);
>  
> -    uart->stop_bits = simple_strtoul(conf, &conf, 10);
> +        uart->stop_bits = simple_strtoul(conf + 1, &conf, 10);
> +    }
>  
> -    if ( *conf == ',' )
> +    if ( *conf == ',' && *++conf != ',' )
>      {
> -        conf++;
>          if ( strncmp(conf, "pci", 3) == 0 )
>          {
>              if ( pci_uart_config(uart, 1/* skip AMT */, uart - ns16550_com) )
> @@ -592,24 +589,21 @@ static void __init ns16550_parse_port_co
>          {
>              uart->io_base = simple_strtoul(conf, &conf, 0);
>          }
> +    }
>  
> -        if ( *conf == ',' )
> -        {
> -            conf++;
> -            uart->irq = simple_strtoul(conf, &conf, 10);
> -            if ( *conf == ',' )
> -            {
> -                conf++;
> -                uart->ps_bdf_enable = 1;
> -                parse_pci_bdf(&conf, &uart->ps_bdf[0]);
> -                if ( *conf == ',' )
> -                {
> -                    conf++;
> -                    uart->pb_bdf_enable = 1;
> -                    parse_pci_bdf(&conf, &uart->pb_bdf[0]);
> -                }
> -            }
> -        }
> +    if ( *conf == ',' && *++conf != ',' )
> +        uart->irq = simple_strtol(conf, &conf, 10);
> +
> +    if ( *conf == ',' && *++conf != ',' )
> +    {
> +        uart->ps_bdf_enable = 1;
> +        parse_pci_bdf(&conf, &uart->ps_bdf[0]);
> +    }
> +
> +    if ( *conf == ',' && *++conf != ',' )
> +    {
> +        uart->pb_bdf_enable = 1;
> +        parse_pci_bdf(&conf, &uart->pb_bdf[0]);
>      }
>  
>   config_parsed:
>
>
>

-- 
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com


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