diff options
| author | Ulf Hansson <ulf.hansson@linaro.org> | 2018-10-03 16:38:14 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-10-18 12:25:09 +0200 |
| commit | 2c361684803e0129007806b1ce42cbf9c52f8cd0 (patch) | |
| tree | 11e374e382ed046dc30cd4c6f679f5aa8cbabe81 /drivers/base | |
| parent | 35a7f35ad1b150ddf59a41dcac7b2fa32982be0e (diff) | |
| download | linux-2c361684803e0129007806b1ce42cbf9c52f8cd0.tar.bz2 | |
PM / Domains: Don't treat zero found compatible idle states as an error
Instead of returning -EINVAL from of_genpd_parse_idle_states() in case none
compatible states was found, let's return 0 to indicate success. Assign
also the out-parameter *states to NULL and *n to 0, to indicate to the
caller that zero states have been found/allocated.
This enables the caller of of_genpd_parse_idle_states() to easier act on
the returned error code.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Lina Iyer <ilina@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 4b5714199490..e1bbddb02871 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2478,8 +2478,8 @@ 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 +2488,14 @@ 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) |