[PATCH -next v3 10/15] hwmon: (corsair-cpro) Use devm_hid_hw_start_and_open in ccp_probe()

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

Currently, the corsair-cpro 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 out_hw_close and hid_hw_stop
lables, and directly return the error code when an error occurs.

Acked-by: Marius Zachmann <mail@mariuszachmann.de>
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/20240909012313.500341-11-lizetao1@huawei.com/
v1 -> v2: Adjust commit information
v1: https://lore.kernel.org/all/20240904123607.3407364-15-lizetao1@huawei.com/

drivers/hwmon/corsair-cpro.c | 24 +++++-------------------
1 file changed, 5 insertions(+), 19 deletions(-)

diff --git a/drivers/hwmon/corsair-cpro.c b/drivers/hwmon/corsair-cpro.c
index e1a7f7aa7f80..7bba30840f32 100644
--- a/drivers/hwmon/corsair-cpro.c
+++ b/drivers/hwmon/corsair-cpro.c
@@ -601,14 +601,10 @@ static int ccp_probe(struct hid_device *hdev, const struct hid_device_id *id)
if (ret)
return ret;

- ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+ ret = devm_hid_hw_start_and_open(hdev, HID_CONNECT_HIDRAW);
if (ret)
return ret;

- ret = hid_hw_open(hdev);
- if (ret)
- goto out_hw_stop;
-
ccp->hdev = hdev;
hid_set_drvdata(hdev, ccp);

@@ -621,28 +617,20 @@ static int ccp_probe(struct hid_device *hdev, const struct hid_device_id *id)
/* temp and fan connection status only updates when device is powered on */
ret = get_temp_cnct(ccp);
if (ret)
- goto out_hw_close;
+ return ret;

ret = get_fan_cnct(ccp);
if (ret)
- goto out_hw_close;
+ return ret;

ccp_debugfs_init(ccp);

ccp->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "corsaircpro",
ccp, &ccp_chip_info, NULL);
- if (IS_ERR(ccp->hwmon_dev)) {
- ret = PTR_ERR(ccp->hwmon_dev);
- goto out_hw_close;
- }
+ if (IS_ERR(ccp->hwmon_dev))
+ return PTR_ERR(ccp->hwmon_dev);

return 0;
-
-out_hw_close:
- hid_hw_close(hdev);
-out_hw_stop:
- hid_hw_stop(hdev);
- return ret;
}

static void ccp_remove(struct hid_device *hdev)
@@ -651,8 +639,6 @@ static void ccp_remove(struct hid_device *hdev)

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

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