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authorNishanth Menon <nm@ti.com>2016-05-05 19:29:51 -0500
committerMark Brown <broonie@kernel.org>2016-05-06 18:15:18 +0100
commit7f091e53c9efc52b2b3a03a8a1d479a47956fecd (patch)
tree54827945addf98d7688d14e09ca1ddcd0762cba7 /drivers/regulator
parent1b42443db670dde5e3cb4261f77b29010b163fc6 (diff)
downloadlinux-7f091e53c9efc52b2b3a03a8a1d479a47956fecd.tar.bz2
regulator: tps65917/palmas: Handle possible memory allocation failure
Stop the palmas regulator driver from imagining that the allocations will always succeed. Since regulator dt nodes are optional in nature and can be described in downstream drivers via platform data, continue to maintain code flow as prior when of node is not found. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/palmas-regulator.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c
index 3b9206224cd1..faa389be7ca3 100644
--- a/drivers/regulator/palmas-regulator.c
+++ b/drivers/regulator/palmas-regulator.c
@@ -1467,10 +1467,10 @@ static struct palmas_pmic_driver_data tps65917_ddata = {
.ldo_register = tps65917_ldo_registration,
};
-static void palmas_dt_to_pdata(struct device *dev,
- struct device_node *node,
- struct palmas_pmic_platform_data *pdata,
- struct palmas_pmic_driver_data *ddata)
+static int palmas_dt_to_pdata(struct device *dev,
+ struct device_node *node,
+ struct palmas_pmic_platform_data *pdata,
+ struct palmas_pmic_driver_data *ddata)
{
struct device_node *regulators;
u32 prop;
@@ -1479,7 +1479,7 @@ static void palmas_dt_to_pdata(struct device *dev,
regulators = of_get_child_by_name(node, "regulators");
if (!regulators) {
dev_info(dev, "regulator node not found\n");
- return;
+ return 0;
}
ret = of_regulator_match(dev, regulators, ddata->palmas_matches,
@@ -1487,7 +1487,7 @@ static void palmas_dt_to_pdata(struct device *dev,
of_node_put(regulators);
if (ret < 0) {
dev_err(dev, "Error parsing regulator init data: %d\n", ret);
- return;
+ return 0;
}
for (idx = 0; idx < ddata->max_reg; idx++) {
@@ -1500,6 +1500,9 @@ static void palmas_dt_to_pdata(struct device *dev,
continue;
rinit = devm_kzalloc(dev, sizeof(*rinit), GFP_KERNEL);
+ if (!rinit)
+ return -ENOMEM;
+
pdata->reg_data[idx] = match->init_data;
pdata->reg_init[idx] = rinit;
@@ -1552,6 +1555,8 @@ static void palmas_dt_to_pdata(struct device *dev,
}
pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
+
+ return 0;
}
static const struct of_device_id of_palmas_match_tbl[] = {
@@ -1633,7 +1638,9 @@ static int palmas_regulators_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, pmic);
pmic->palmas->pmic_ddata = driver_data;
- palmas_dt_to_pdata(&pdev->dev, node, pdata, driver_data);
+ ret = palmas_dt_to_pdata(&pdev->dev, node, pdata, driver_data);
+ if (ret)
+ return ret;
ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
if (ret)