diff options
Diffstat (limited to 'drivers/base/power/domain.c')
| -rw-r--r-- | drivers/base/power/domain.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 4b5714199490..7f38a92b444a 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -467,6 +467,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on, return -EAGAIN; } + /* Default to shallowest state. */ + if (!genpd->gov) + genpd->state_idx = 0; + if (genpd->power_off) { int ret; @@ -1687,6 +1691,8 @@ int pm_genpd_init(struct generic_pm_domain *genpd, ret = genpd_set_default_power_state(genpd); if (ret) return ret; + } else if (!gov) { + pr_warn("%s : no governor for states\n", genpd->name); } device_initialize(&genpd->dev); @@ -2478,8 +2484,8 @@ static int genpd_iterate_idle_states(struct device_node *dn, * * Returns the device states parsed from the OF node. The memory for the states * is allocated by this function and is the responsibility of the caller to - * free the memory after use. If no domain idle states is found it returns - * -EINVAL and in case of errors, a negative error code. + * free the memory after use. If any or zero compatible domain idle states is + * found it returns 0 and in case of errors, a negative error code is returned. */ int of_genpd_parse_idle_states(struct device_node *dn, struct genpd_power_state **states, int *n) @@ -2488,8 +2494,14 @@ int of_genpd_parse_idle_states(struct device_node *dn, int ret; ret = genpd_iterate_idle_states(dn, NULL); - if (ret <= 0) - return ret < 0 ? ret : -EINVAL; + if (ret < 0) + return ret; + + if (!ret) { + *states = NULL; + *n = 0; + return 0; + } st = kcalloc(ret, sizeof(*st), GFP_KERNEL); if (!st) |