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regulator: Copy config passed during registration 

Copy the 'regulator_config' structure passed to regulator_register()
function so the driver could safely modify it after parsing init data.

The driver may want to change the config as a result of specific init
data parsed by regulator core (e.g. when core handled parsing device
tree).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2015-01-05 12:48:41 +01:00 committed by Mark Brown
parent 97bf6af1f9
commit 1b3de22338
1 changed files with 15 additions and 3 deletions
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18
drivers/regulator/core.c
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@ -3581,20 +3581,21 @@ static void rdev_init_debugfs(struct regulator_dev *rdev)
*/
struct regulator_dev *
regulator_register(const struct regulator_desc *regulator_desc,
const struct regulator_config *config)
const struct regulator_config *cfg)
{
const struct regulation_constraints *constraints = NULL;
const struct regulator_init_data *init_data;
struct regulator_config *config = NULL;
static atomic_t regulator_no = ATOMIC_INIT(0);
struct regulator_dev *rdev;
struct device *dev;
int ret, i;
const char *supply = NULL;
if (regulator_desc == NULL || config == NULL)
if (regulator_desc == NULL || cfg == NULL)
return ERR_PTR(-EINVAL);
dev = config->dev;
dev = cfg->dev;
WARN_ON(!dev);
if (regulator_desc->name == NULL || regulator_desc->ops == NULL)
@ -3624,6 +3625,16 @@ regulator_register(const struct regulator_desc *regulator_desc,
if (rdev == NULL)
return ERR_PTR(-ENOMEM);
/*
* Duplicate the config so the driver could override it after
* parsing init data.
*/
config = kmemdup(cfg, sizeof(*cfg), GFP_KERNEL);
if (config == NULL) {
kfree(rdev);
return ERR_PTR(-ENOMEM);
}
init_data = regulator_of_get_init_data(dev, regulator_desc,
&rdev->dev.of_node);
if (!init_data) {
@ -3752,6 +3763,7 @@ add_dev:
rdev_init_debugfs(rdev);
out:
mutex_unlock(&regulator_list_mutex);
kfree(config);
return rdev;
unset_supplies: