[PATCH -next v3 04/15] HID: mcp2200: Use devm_hid_hw_start_and_open in mcp2200_probe()
From: Li Zetao <hidden>
Date: 2024-09-10 15:37:04
Also in:
linux-hwmon, linux-i2c
Subsystem:
hid core layer, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Linus Torvalds
Currently, the mcp2200 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. So there is no need to close and stop hid when an error occurs. At the same time, since there is no need to do any operations in mcp2200_remove() now, so delete .remote operation. Signed-off-by: Li Zetao <redacted> --- v2 -> v3: None v2: https://lore.kernel.org/all/20240909012313.500341-5-lizetao1@huawei.com/ (local) v1 -> v2: Adjust commit information v1: https://lore.kernel.org/all/20240904123607.3407364-5-lizetao1@huawei.com/ (local) drivers/hid/hid-mcp2200.c | 22 ++-------------------- 1 file changed, 2 insertions(+), 20 deletions(-)
diff --git a/drivers/hid/hid-mcp2200.c b/drivers/hid/hid-mcp2200.c
index bf57f7f6caa0..56d72fc5623d 100644
--- a/drivers/hid/hid-mcp2200.c
+++ b/drivers/hid/hid-mcp2200.c@@ -329,22 +329,13 @@ static int mcp2200_probe(struct hid_device *hdev, const struct hid_device_id *id return ret; } - ret = hid_hw_start(hdev, 0); - if (ret) { - hid_err(hdev, "can't start hardware\n"); + ret = devm_hid_hw_start_and_open(hdev, 0); + if (ret) return ret; - } hid_info(hdev, "USB HID v%x.%02x Device [%s] on %s\n", hdev->version >> 8, hdev->version & 0xff, hdev->name, hdev->phys); - ret = hid_hw_open(hdev); - if (ret) { - hid_err(hdev, "can't open device\n"); - hid_hw_stop(hdev); - return ret; - } - mutex_init(&mcp->lock); init_completion(&mcp->wait_in_report); hid_set_drvdata(hdev, mcp);
@@ -356,20 +347,12 @@ static int mcp2200_probe(struct hid_device *hdev, const struct hid_device_id *id ret = devm_gpiochip_add_data(&hdev->dev, &mcp->gc, mcp); if (ret < 0) { hid_err(hdev, "Unable to register gpiochip\n"); - hid_hw_close(hdev); - hid_hw_stop(hdev); return ret; } return 0; } -static void mcp2200_remove(struct hid_device *hdev) -{ - hid_hw_close(hdev); - hid_hw_stop(hdev); -} - static const struct hid_device_id mcp2200_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_MCP2200) }, { }
@@ -380,7 +363,6 @@ static struct hid_driver mcp2200_driver = { .name = "mcp2200", .id_table = mcp2200_devices, .probe = mcp2200_probe, - .remove = mcp2200_remove, .raw_event = mcp2200_raw_event, };
--
2.34.1