ACK: [PATCH] acpi: cstates: fix clang build warning on zero CPUs.

[Alex Hung]

On 12/16/2015 10:53 PM, Colin King wrote:
> From: Colin Ian King <colin.king at canonical.com>
>
> A small corner case were zero CPUs are available in
> /sys/devices/system/cpu can cause a division by zero when
> computing the tests progress.  Bail out early and don't test
> any CPUs rather if the number of CPUs is zero.  This can
> potentially occur if the /sys entries are not mounted.
>
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
> ---
>   src/acpi/cstates/cstates.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/src/acpi/cstates/cstates.c b/src/acpi/cstates/cstates.c
> index 4bced4d..5e15732 100644
> --- a/src/acpi/cstates/cstates.c
> +++ b/src/acpi/cstates/cstates.c
> @@ -217,7 +217,7 @@ static int cstates_test1(fwts_framework *fw)
>   	}
>
>   	/* How many CPUs are there? */
> -	for (cpus=0;(entry = readdir(dir)) != NULL;)
> +	for (cpus = 0; (entry = readdir(dir)) != NULL;)
>   		if (entry &&
>   		    (strlen(entry->d_name)>3) &&
>   		    (strncmp(entry->d_name, "cpu", 3) == 0) &&
> @@ -226,7 +226,7 @@ static int cstates_test1(fwts_framework *fw)
>
>   	rewinddir(dir);
>
> -	for (i=0;(entry = readdir(dir)) != NULL;) {
> +	for (i = 0; (cpus > 0) && (entry = readdir(dir)) != NULL;) {
>   		if (entry &&
>   		    (strlen(entry->d_name)>3) &&
>   		    (strncmp(entry->d_name, "cpu", 3) == 0) &&
>

Acked-by: Alex Hung <alex.hung at canonical.com>