Use __free for device_node values, and thus drop calls to
of_node_put.
The variable attribute __free adds a scope based cleanup to
the device node. The goal is to reduce memory management issues
in the kernel code.
The of_node_put calls were removed, and the
for_each_available_child_of_node was replaced to the equivalent
for_each_available_child_of_node_scoped which use the __free.
Suggested-by: Julia Lawall <[email protected]>
Signed-off-by: MarileneGarcia <[email protected]>
---
Changes:
These changes intend to add the new __free cleanup handler
to device_node initialisations, which ensures that the resource is
freed as soon as the variable goes out of scope. Thus removing the
need to manually free up the resource using of_node_put
Thank you.
drivers/leds/leds-powernv.c | 29 +++++++++--------------------
1 file changed, 9 insertions(+), 20 deletions(-)
diff --git a/drivers/leds/leds-powernv.c b/drivers/leds/leds-powernv.c
index 4f01acb75727..68fe47cd1a4f 100644
--- a/drivers/leds/leds-powernv.c
+++ b/drivers/leds/leds-powernv.c
@@ -246,29 +246,25 @@ static int powernv_led_classdev(struct platform_device *pdev,
const char *cur = NULL;
int rc = -1;
struct property *p;
- struct device_node *np;
struct powernv_led_data *powernv_led;
struct device *dev = &pdev->dev;
- for_each_available_child_of_node(led_node, np) {
+ for_each_available_child_of_node_scoped(led_node, np) {
p = of_find_property(np, "led-types", NULL);
while ((cur = of_prop_next_string(p, cur)) != NULL) {
powernv_led = devm_kzalloc(dev, sizeof(*powernv_led),
GFP_KERNEL);
- if (!powernv_led) {
- of_node_put(np);
+ if (!powernv_led)
return -ENOMEM;
- }
powernv_led->common = powernv_led_common;
powernv_led->loc_code = (char *)np->name;
rc = powernv_led_create(dev, powernv_led, cur);
- if (rc) {
- of_node_put(np);
+ if (rc)
return rc;
- }
+
} /* while end */
}
@@ -278,12 +274,10 @@ static int powernv_led_classdev(struct platform_device *pdev,
/* Platform driver probe */
static int powernv_led_probe(struct platform_device *pdev)
{
- struct device_node *led_node;
struct powernv_led_common *powernv_led_common;
struct device *dev = &pdev->dev;
- int rc;
-
- led_node = of_find_node_by_path("/ibm,opal/leds");
+ struct device_node *led_node __free(device_node) =
+ of_find_node_by_path("/ibm,opal/leds");
if (!led_node) {
dev_err(dev, "%s: LED parent device node not found\n",
__func__);
@@ -292,20 +286,15 @@ static int powernv_led_probe(struct platform_device *pdev)
powernv_led_common = devm_kzalloc(dev, sizeof(*powernv_led_common),
GFP_KERNEL);
- if (!powernv_led_common) {
- rc = -ENOMEM;
- goto out;
- }
+ if (!powernv_led_common)
+ return -ENOMEM;
mutex_init(&powernv_led_common->lock);
powernv_led_common->max_led_type = cpu_to_be64(OPAL_SLOT_LED_TYPE_MAX);
platform_set_drvdata(pdev, powernv_led_common);
- rc = powernv_led_classdev(pdev, led_node, powernv_led_common);
-out:
- of_node_put(led_node);
- return rc;
+ return powernv_led_classdev(pdev, led_node, powernv_led_common);
}
/* Platform driver remove */
--
2.34.1