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[v4,2/3] PM: domains: Make of_genpd_add_subdomain() to return -EPROBE_DEFER

Message ID 20210120015010.14191-3-digetx@gmail.com
State New
Headers show
Series GENPD API improvements | expand

Commit Message

Dmitry Osipenko Jan. 20, 2021, 1:50 a.m. UTC
Driver of a power domain provider may not be ready at the time of
of_genpd_add_subdomain() invocation. Make this function to return
-EPROBE_DEFER instead of -ENOENT in order to remove a need from
power domain drivers to handle the error code specially.

Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Tested-by: Matt Merhar <mattmerhar@protonmail.com>
[tested on NVIDIA Tegra20/30/124 SoCs]
Suggested-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
 drivers/base/power/domain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 0bd0cdc30393..def1299ad085 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2466,7 +2466,7 @@  int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
-	return ret;
+	return ret == -ENOENT ? -EPROBE_DEFER : ret;