[PATCH -next v3 12/15] hwmon: (gigabyte_waterforce) Use devm_hid_hw_start_and_open in waterforce_probe()

Li Zetao
2024-09-10T15:36:59Z

Currently, the waterforce module needs to maintain hid resources
by itself. Use devm_hid_hw_start_and_open helper to ensure that hid
resources are consistent with the device life cycle, and release
hid resources before device is released. At the same time, it can avoid
the goto-release encoding, drop the fail_and_close and fail_and_stop
lables, and directly return the error code when an error occurs.

Reviewed-by: Aleksa Savic <savicaleksa83@gmail.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Li Zetao <lizetao1@huawei.com>
---
v2 -> v3: None
v2: https://lore.kernel.org/all/20240909012313.500341-13-lizetao1@huawei.com/
v1 -> v2: Adjust commit information
v1: https://lore.kernel.org/all/20240904123607.3407364-16-lizetao1@huawei.com/

drivers/hwmon/gigabyte_waterforce.c | 29 +++++------------------------
1 file changed, 5 insertions(+), 24 deletions(-)

diff --git a/drivers/hwmon/gigabyte_waterforce.c b/drivers/hwmon/gigabyte_waterforce.c
index 8129d7b3ceaf..9052d1c3d5aa 100644
--- a/drivers/hwmon/gigabyte_waterforce.c
+++ b/drivers/hwmon/gigabyte_waterforce.c
@@ -337,23 +337,13 @@ static int waterforce_probe(struct hid_device *hdev, const struct hid_device_id
/*
* Enable hidraw so existing user-space tools can continue to work.
*/
- ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
- if (ret) {
- hid_err(hdev, "hid hw start failed with %d\n", ret);
+ ret = devm_hid_hw_start_and_open(hdev, HID_CONNECT_HIDRAW);
+ if (ret)
return ret;
- }
-
- ret = hid_hw_open(hdev);
- if (ret) {
- hid_err(hdev, "hid hw open failed with %d\n", ret);
- goto fail_and_stop;
- }

priv->buffer = devm_kzalloc(&hdev->dev, MAX_REPORT_LENGTH, GFP_KERNEL);
- if (!priv->buffer) {
- ret = -ENOMEM;
- goto fail_and_close;
- }
+ if (!priv->buffer)
+ return -ENOMEM;

mutex_init(&priv->status_report_request_mutex);
mutex_init(&priv->buffer_lock);
@@ -371,18 +361,12 @@ static int waterforce_probe(struct hid_device *hdev, const struct hid_device_id
if (IS_ERR(priv->hwmon_dev)) {
ret = PTR_ERR(priv->hwmon_dev);
hid_err(hdev, "hwmon registration failed with %d\n", ret);
- goto fail_and_close;
+ return ret;
}

waterforce_debugfs_init(priv);

return 0;
-
-fail_and_close:
- hid_hw_close(hdev);
-fail_and_stop:
- hid_hw_stop(hdev);
- return ret;
}

static void waterforce_remove(struct hid_device *hdev)
@@ -391,9 +375,6 @@ static void waterforce_remove(struct hid_device *hdev)

debugfs_remove_recursive(priv->debugfs);
hwmon_device_unregister(priv->hwmon_dev);
-
- hid_hw_close(hdev);
- hid_hw_stop(hdev);
}

static const struct hid_device_id waterforce_table[] = {
--
2.34.1