diff options
author | Charles Keepax <ckeepax@opensource.wolfsonmicro.com> | 2014-04-03 15:32:17 +0100 |
---|---|---|
committer | Mark Brown <broonie@linaro.org> | 2014-04-14 17:01:24 +0100 |
commit | 63c7c9e16c8e92cc069854f2babdf82d2d38e4c7 (patch) | |
tree | cefd292824e43e2923f82316275e803fb5ddab7a /drivers/regulator | |
parent | 3764806440149ea9024dff039497d1e45d6ed027 (diff) |
regulator: core: Get and put regulator of_node
Currently the regulator core does not take an additional reference to
the of_node it is passed. This means that the caller must ensure that
the of_node is valid for the duration of the regulator's existance.
It is reasonable for the framework to assume it is passed a valid
of_node but seems onerous for it to assume the caller will keep the node
valid for the life-time of the regulator, especially when
devm_regulator_register is used and there will likely be no code in the
driver called at the point it would be safe to put the of_node.
This patch adds an additional of_node_get when the regulator is
registered and an of_node_put when it is unregistered in the core. This
means individual drivers are free to put their of_node references at the
end of probe letting the regulator core handling it from there. This
simplifies code on the driver side.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/regulator')
-rw-r--r-- | drivers/regulator/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 9a09f3cdbabb..b97ffd2365d3 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -3447,7 +3447,7 @@ regulator_register(const struct regulator_desc *regulator_desc, /* register with sysfs */ rdev->dev.class = ®ulator_class; - rdev->dev.of_node = config->of_node; + rdev->dev.of_node = of_node_get(config->of_node); rdev->dev.parent = dev; dev_set_name(&rdev->dev, "regulator.%d", atomic_inc_return(®ulator_no) - 1); @@ -3589,6 +3589,7 @@ void regulator_unregister(struct regulator_dev *rdev) list_del(&rdev->list); kfree(rdev->constraints); regulator_ena_gpio_free(rdev); + of_node_put(rdev->dev.of_node); device_unregister(&rdev->dev); mutex_unlock(®ulator_list_mutex); } |