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authorNiklas Cassel <niklas.cassel@linaro.org>2018-07-16 15:32:51 +0200
committerMark Brown <broonie@kernel.org>2018-07-20 17:40:46 +0100
commitfffe7f52eb5db41eedadba9a8038e982dcfaee0c (patch)
tree39b48bf3971fbcffbab345c6e8c1fd77e52e67d9 /drivers/regulator
parentcf18fd01466d59263c615165341684a055206dd5 (diff)
downloadlinux-fffe7f52eb5db41eedadba9a8038e982dcfaee0c.tar.bz2
regulator: qcom_spmi: Fix warning Bad of_node_put()
For of_find_node_by_name(), you typically pass what the previous call returned. Therefore, of_find_node_by_name() increases the refcount of the returned node, and decreases the refcount of the node passed as the first argument. of_find_node_by_name() is incorrectly used, and produces a warning. Fix the warning by using the more suitable function of_get_child_by_name(). Also add a missing of_node_put() for the returned value, since this was previously being leaked. OF: ERROR: Bad of_node_put() on /soc/qcom,spmi@400f000/pmic@3/regulators CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 4.18.0-rc4-00223-gefd7b360b70e #12 Hardware name: Qualcomm Technologies, Inc. DB820c (DT) Call trace: dump_backtrace+0x0/0x1a8 show_stack+0x14/0x20 dump_stack+0x90/0xb4 of_node_release+0x74/0x78 kobject_put+0x90/0x1f0 of_node_put+0x14/0x20 of_find_node_by_name+0x80/0xd8 qcom_spmi_regulator_probe+0x30c/0x508 Fixes: 0caecaa87202 ("regulator: qcom_spmi: Add support for SAW") Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/qcom_spmi-regulator.c32
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/regulator/qcom_spmi-regulator.c b/drivers/regulator/qcom_spmi-regulator.c
index 9817f1a75342..4cc14c65d86b 100644
--- a/drivers/regulator/qcom_spmi-regulator.c
+++ b/drivers/regulator/qcom_spmi-regulator.c
@@ -1752,7 +1752,8 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
const char *name;
struct device *dev = &pdev->dev;
struct device_node *node = pdev->dev.of_node;
- struct device_node *syscon;
+ struct device_node *syscon, *reg_node;
+ struct property *reg_prop;
int ret, lenp;
struct list_head *vreg_list;
@@ -1780,10 +1781,13 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
for (reg = match->data; reg->name; reg++) {
- if (saw_regmap && \
- of_find_property(of_find_node_by_name(node, reg->name), \
- "qcom,saw-slave", &lenp)) {
- continue;
+ if (saw_regmap) {
+ reg_node = of_get_child_by_name(node, reg->name);
+ reg_prop = of_find_property(reg_node, "qcom,saw-slave",
+ &lenp);
+ of_node_put(reg_node);
+ if (reg_prop)
+ continue;
}
vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
@@ -1816,13 +1820,17 @@ static int qcom_spmi_regulator_probe(struct platform_device *pdev)
if (ret)
continue;
- if (saw_regmap && \
- of_find_property(of_find_node_by_name(node, reg->name), \
- "qcom,saw-leader", &lenp)) {
- spmi_saw_ops = *(vreg->desc.ops);
- spmi_saw_ops.set_voltage_sel = \
- spmi_regulator_saw_set_voltage;
- vreg->desc.ops = &spmi_saw_ops;
+ if (saw_regmap) {
+ reg_node = of_get_child_by_name(node, reg->name);
+ reg_prop = of_find_property(reg_node, "qcom,saw-leader",
+ &lenp);
+ of_node_put(reg_node);
+ if (reg_prop) {
+ spmi_saw_ops = *(vreg->desc.ops);
+ spmi_saw_ops.set_voltage_sel =
+ spmi_regulator_saw_set_voltage;
+ vreg->desc.ops = &spmi_saw_ops;
+ }
}
config.dev = dev;