From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Ulf Hansson <ulf.hansson@linaro.org>,
Peter Geis <pgwipeout@gmail.com>,
Nicolas Chauvet <kwizart@gmail.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Kevin Hilman <khilman@kernel.org>,
Peter De Schrijver <pdeschrijver@nvidia.com>,
Viresh Kumar <vireshk@kernel.org>,
Stephen Boyd <sboyd@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Matt Merhar <mattmerhar@protonmail.com>
Cc: linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-pm@vger.kernel.org
Subject: [PATCH v4 2/3] PM: domains: Make of_genpd_add_subdomain() to return -EPROBE_DEFER
Date: Wed, 20 Jan 2021 04:50:09 +0300 [thread overview]
Message-ID: <20210120015010.14191-3-digetx@gmail.com> (raw)
In-Reply-To: <20210120015010.14191-1-digetx@gmail.com>
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(-)
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,
out:
mutex_unlock(&gpd_list_lock);
- return ret;
+ return ret == -ENOENT ? -EPROBE_DEFER : ret;
}
EXPORT_SYMBOL_GPL(of_genpd_add_subdomain);
--
2.29.2
next prev parent reply other threads:[~2021-01-20 1:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 1:50 [PATCH v4 0/3] GENPD API improvements Dmitry Osipenko
2021-01-20 1:50 ` [PATCH v4 1/3] PM: domains: Make set_performance_state() callback optional Dmitry Osipenko
2021-01-20 4:39 ` Viresh Kumar
2021-01-20 9:46 ` Ulf Hansson
2021-01-20 1:50 ` Dmitry Osipenko [this message]
2021-01-20 1:50 ` [PATCH v4 3/3] PM: domains: Add "performance" column to debug summary Dmitry Osipenko
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