From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 658d04e6eb6be1601ae95d7bee92bbf4096cdc1e ]
Fix the following issues with lenovo_led_set_tp10ubkbd() error handling:
1. On success hid_hw_raw_request() returns the number of bytes sent. So we should check for (ret != 3) rather then for (ret != 0).
2. Actually propagate errors to the caller.
3. Since the LEDs are part of an USB keyboard-dock the mute LEDs can go away at any time. Don't log an error when ret == -ENODEV and set the LED_HW_PLUGGABLE flag to avoid errors getting logged when the USB gets disconnected.
Fixes: bc04b37ea0ec ("HID: lenovo: Add ThinkPad 10 Ultrabook Keyboard support") Reviewed-by: Marek Behún kabel@kernel.org Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hid/hid-lenovo.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-)
diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c index 4dc5e5f932ed..ee175ab54281 100644 --- a/drivers/hid/hid-lenovo.c +++ b/drivers/hid/hid-lenovo.c @@ -62,8 +62,8 @@ struct lenovo_drvdata { #define TP10UBKBD_LED_OFF 1 #define TP10UBKBD_LED_ON 2
-static void lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code, - enum led_brightness value) +static int lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code, + enum led_brightness value) { struct lenovo_drvdata *data = hid_get_drvdata(hdev); int ret; @@ -75,10 +75,18 @@ static void lenovo_led_set_tp10ubkbd(struct hid_device *hdev, u8 led_code, data->led_report[2] = value ? TP10UBKBD_LED_ON : TP10UBKBD_LED_OFF; ret = hid_hw_raw_request(hdev, data->led_report[0], data->led_report, 3, HID_OUTPUT_REPORT, HID_REQ_SET_REPORT); - if (ret) - hid_err(hdev, "Set LED output report error: %d\n", ret); + if (ret != 3) { + if (ret != -ENODEV) + hid_err(hdev, "Set LED output report error: %d\n", ret); + + ret = ret < 0 ? ret : -EIO; + } else { + ret = 0; + }
mutex_unlock(&data->led_report_mutex); + + return ret; }
static void lenovo_tp10ubkbd_sync_fn_lock(struct work_struct *work) @@ -349,7 +357,7 @@ static ssize_t attr_fn_lock_store(struct device *dev, { struct hid_device *hdev = to_hid_device(dev); struct lenovo_drvdata *data = hid_get_drvdata(hdev); - int value; + int value, ret;
if (kstrtoint(buf, 10, &value)) return -EINVAL; @@ -364,7 +372,9 @@ static ssize_t attr_fn_lock_store(struct device *dev, lenovo_features_set_cptkbd(hdev); break; case USB_DEVICE_ID_LENOVO_TP10UBKBD: - lenovo_led_set_tp10ubkbd(hdev, TP10UBKBD_FN_LOCK_LED, value); + ret = lenovo_led_set_tp10ubkbd(hdev, TP10UBKBD_FN_LOCK_LED, value); + if (ret) + return ret; break; }
@@ -785,6 +795,7 @@ static int lenovo_led_brightness_set(struct led_classdev *led_cdev, struct lenovo_drvdata *data_pointer = hid_get_drvdata(hdev); u8 tp10ubkbd_led[] = { TP10UBKBD_MUTE_LED, TP10UBKBD_MICMUTE_LED }; int led_nr = 0; + int ret = 0;
if (led_cdev == &data_pointer->led_micmute) led_nr = 1; @@ -799,11 +810,11 @@ static int lenovo_led_brightness_set(struct led_classdev *led_cdev, lenovo_led_set_tpkbd(hdev); break; case USB_DEVICE_ID_LENOVO_TP10UBKBD: - lenovo_led_set_tp10ubkbd(hdev, tp10ubkbd_led[led_nr], value); + ret = lenovo_led_set_tp10ubkbd(hdev, tp10ubkbd_led[led_nr], value); break; }
- return 0; + return ret; }
static int lenovo_register_leds(struct hid_device *hdev) @@ -825,6 +836,7 @@ static int lenovo_register_leds(struct hid_device *hdev) data->led_mute.name = name_mute; data->led_mute.brightness_get = lenovo_led_brightness_get; data->led_mute.brightness_set_blocking = lenovo_led_brightness_set; + data->led_mute.flags = LED_HW_PLUGGABLE; data->led_mute.dev = &hdev->dev; ret = led_classdev_register(&hdev->dev, &data->led_mute); if (ret < 0) @@ -833,6 +845,7 @@ static int lenovo_register_leds(struct hid_device *hdev) data->led_micmute.name = name_micm; data->led_micmute.brightness_get = lenovo_led_brightness_get; data->led_micmute.brightness_set_blocking = lenovo_led_brightness_set; + data->led_micmute.flags = LED_HW_PLUGGABLE; data->led_micmute.dev = &hdev->dev; ret = led_classdev_register(&hdev->dev, &data->led_micmute); if (ret < 0) {