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PM / Domains: check for negative return from of_count_phandle_with_args()

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The return from of_count_phandle_with_args can be negative, so we
should avoid kcalloc of a negative count of genpd_power_stat structs
by sanity checking if count is zero or less.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Colin Ian King 2016-10-25 17:33:27 +01:00 committed by Rafael J. Wysocki
parent 411bf2a8db
commit a1fee00dc9
1 changed files with 1 additions and 1 deletions
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2
drivers/base/power/domain.c
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@ -2113,7 +2113,7 @@ int of_genpd_parse_idle_states(struct device_node *dn,
struct of_phandle_iterator it;
count = of_count_phandle_with_args(dn, "domain-idle-states", NULL);
if (!count)
if (count <= 0)
return -EINVAL;
st = kcalloc(count, sizeof(*st), GFP_KERNEL);