linux-kernel - Re: [PATCHv2] edd: support original Phoenix EDD 3.0 information

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Date:	Thu, 21 May 2015 09:40:49 +0200
From:	Hannes Reinecke <hare@...e.de>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
CC:	linux-kernel@...r.kernel.org,
	Johannes Thumshirn <jtumshirn@...e.com>,
	Paul Bolle <pebolle@...cali.nl>
Subject: Re: [PATCHv2] edd: support original Phoenix EDD 3.0 information

On 05/21/2015 09:39 AM, Hannes Reinecke wrote:
> The original Phoenix EDD 3.0 specification (as found in
> eg http://mbldr.sourceforge.net/specsedd30.pdf) has a
> device path length of 36, not 44.
> All the other fields are identical, so we can trivially support
> both formats.
> 
> Cc: Paul Bolle <pebolle@...cali.nl>
> Signed-off-by: Hannes Reinecke <hare@...e.de>
> ---
>  drivers/firmware/edd.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/firmware/edd.c b/drivers/firmware/edd.c
> index e229576..92bc0e8 100644
> --- a/drivers/firmware/edd.c
> +++ b/drivers/firmware/edd.c
> @@ -8,6 +8,8 @@
>   * BIOS Enhanced Disk Drive Services (EDD)
>   * conformant to T13 Committee www.t13.org
>   *   projects 1572D, 1484D, 1386D, 1226DT
> + * and the original Phoenix BIOS EDD 3.0 spec from
> + * <http://mbldr.sourceforge.net/specsedd30.pdf>
>   *
>   * This code takes information provided by BIOS EDD calls
>   * fn41 - Check Extensions Present and
> @@ -545,8 +547,9 @@ edd_has_edd30(struct edd_device *edev)
>  	}
>  
>  
> -	/* We support only T13 spec */
> -	if (info->params.device_path_info_length != 44)
> +	/* We support T13 d1572 and the original Phoenix spec */
> +	if (info->params.device_path_info_length != 44 &&
> +	    info->params.device_path_info_lenght != 36)
>  		return 0;
>  
>  	for (i = 30; i < info->params.device_path_info_length + 30; i++)
> 
No for gods sake.
My mailer must really hate me.

Next try will follow ...

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		               zSeries & Storage
hare@...e.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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