Re: [patch 16/17] s390: multiple subchannel sets support.

[Greg Smith <gsmith@nc.rr.com>]

On Mon, 2006-02-27 at 09:15 +0100, Cornelia Huck wrote:

> The architecture seems to disagree somewhat :)

You mean you all got doc??  What kind of hackers R u guys ;-)

> anyway... I'd prefer the following patch:

Works for me (tm)

> s390: Improve response code handling in chsc_enable_facility().
> 
> Rather than checking for some known failures, check positively for the
> success response code 0x0001 and return -EIO for unrecognized failure
> response codes.
> 
> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
> 
>  chsc.c |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
> index 8cf9905..f4183d6 100644
> --- a/drivers/s390/cio/chsc.c
> +++ b/drivers/s390/cio/chsc.c
> @@ -1115,6 +1115,9 @@ chsc_enable_facility(int operation_code)
>  		goto out;
>  	}
>  	switch (sda_area->response.code) {
> +	case 0x0001: /* everything ok */
> +		ret = 0;
> +		break;
>  	case 0x0003: /* invalid request block */
>  	case 0x0007:
>  		ret = -EINVAL;
> @@ -1123,6 +1126,8 @@ chsc_enable_facility(int operation_code)
>  	case 0x0101: /* facility not provided */
>  		ret = -EOPNOTSUPP;
>  		break;
> +	default: /* something went wrong */
> +		ret = -EIO;
>  	}
>   out:
>  	free_page((unsigned long)sda_area);

Many thanks,
Greg Smith

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