[Accel-config] Re: [PATCH v1] accel-config: Return error if DSA environment not found

On 2/10/2021 11:00 AM, ramesh.thomas(a)intel.com wrote:
> From: Ramesh Thomas <ramesh.thomas(a)intel.com>
>
> Check for presence of DSA sysfs folder /sys/bus/dsa before running
> commands. If not found print an error message and return -ENOENT
>
> Signed-off-by: Ramesh Thomas <ramesh.thomas(a)intel.com>
> ---
>   accfg/accel-config.c | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/accfg/accel-config.c b/accfg/accel-config.c
> index f963fc7..01a1cd9 100644
> --- a/accfg/accel-config.c
> +++ b/accfg/accel-config.c
> @@ -95,6 +95,12 @@ int main(int argc, const char **argv)
>   		return 0;
>   	}
>   
> +	if (access("/sys/bus/dsa", R_OK)) {
For the most part this is fine. I wonder if there will ever be a 
platform with IAX and no DSA. Maybe check for dsa || iax?
> +		fprintf(stderr,
> +			"DSA environment not found. Is the driver loaded?\n");
> +		return -ENOENT;
> +	}
> +
>   	rc = accfg_new(&ctx);
>   	if (rc)
>   		return 0;