[PATCH v5 3/3] extcon: Add extcon_alloc_groups to simplify extcon register function

From: Bumwoo Lee
Date: Sun Mar 19 2023 - 23:20:17 EST


The alloc groups is functionalized from extcon_dev_register.

Signed-off-by: Bumwoo Lee <bw365.lee@xxxxxxxxxxx>
---
drivers/extcon/extcon.c | 61 ++++++++++++++++++++++++++---------------
1 file changed, 39 insertions(+), 22 deletions(-)

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 86290afa35fb..26a84bed0874 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -1187,6 +1187,42 @@ static int extcon_alloc_muex(struct extcon_dev *edev)
return 0;
}

+/**
+ * extcon_alloc_groups() - alloc the groups for extcon device
+ * @edev: extcon device
+ *
+ * Returns 0 if success or error number if fail.
+ */
+static int extcon_alloc_groups(struct extcon_dev *edev)
+{
+ int index;
+
+ if (!edev)
+ return -EINVAL;
+
+ if (!edev->max_supported)
+ return 0;
+
+ edev->extcon_dev_type.groups = kcalloc(edev->max_supported + 2,
+ sizeof(struct attribute_group *),
+ GFP_KERNEL);
+ if (!edev->extcon_dev_type.groups)
+ return -ENOMEM;
+
+ edev->extcon_dev_type.name = dev_name(&edev->dev);
+ edev->extcon_dev_type.release = dummy_sysfs_dev_release;
+
+ for (index = 0; index < edev->max_supported; index++)
+ edev->extcon_dev_type.groups[index] = &edev->cables[index].attr_g;
+
+ if (edev->mutually_exclusive)
+ edev->extcon_dev_type.groups[index] = &edev->attr_g_muex;
+
+ edev->dev.type = &edev->extcon_dev_type;
+
+ return 0;
+}
+
/**
* extcon_dev_register() - Register an new extcon device
* @edev: the extcon device to be registered
@@ -1242,28 +1278,9 @@ int extcon_dev_register(struct extcon_dev *edev)
if (ret < 0)
goto err_alloc_muex;

- if (edev->max_supported) {
- edev->extcon_dev_type.groups =
- kcalloc(edev->max_supported + 2,
- sizeof(struct attribute_group *),
- GFP_KERNEL);
- if (!edev->extcon_dev_type.groups) {
- ret = -ENOMEM;
- goto err_alloc_groups;
- }
-
- edev->extcon_dev_type.name = dev_name(&edev->dev);
- edev->extcon_dev_type.release = dummy_sysfs_dev_release;
-
- for (index = 0; index < edev->max_supported; index++)
- edev->extcon_dev_type.groups[index] =
- &edev->cables[index].attr_g;
- if (edev->mutually_exclusive)
- edev->extcon_dev_type.groups[index] =
- &edev->attr_g_muex;
-
- edev->dev.type = &edev->extcon_dev_type;
- }
+ ret = extcon_alloc_groups(edev);
+ if (ret < 0)
+ goto err_alloc_groups;

spin_lock_init(&edev->lock);
if (edev->max_supported) {
--
2.35.1