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| author | Bastien Nocera <hadess@hadess.net> | 2023-01-25 13:17:22 +0100 |
|---|---|---|
| committer | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2023-02-10 14:29:50 +0100 |
| commit | 498ba20690357691103de0f766960355247c78be (patch) | |
| tree | 0d4c6d7ca27782f1b96831c7f04ad9256317ce48 /drivers/hid/hid-logitech-hidpp.c | |
| parent | 43551d9bea826cec4a40a98984ae2db6dac476b3 (diff) | |
| download | linux-stable-498ba20690357691103de0f766960355247c78be.tar.gz linux-stable-498ba20690357691103de0f766960355247c78be.tar.bz2 linux-stable-498ba20690357691103de0f766960355247c78be.zip | |
HID: logitech-hidpp: Don't restart communication if not necessary
Don't stop and restart communication with the device unless we need to
modify the connect flags used because of a device quirk.
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Link: https://lore.kernel.org/r/20230125121723.3122-1-hadess@hadess.net
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Diffstat (limited to 'drivers/hid/hid-logitech-hidpp.c')
| -rw-r--r-- | drivers/hid/hid-logitech-hidpp.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 7ffc15cec055..1325fc0e4b73 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -4106,6 +4106,7 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) bool connected; unsigned int connect_mask = HID_CONNECT_DEFAULT; struct hidpp_ff_private_data data; + bool will_restart = false; /* report_fixup needs drvdata to be set before we call hid_parse */ hidpp = devm_kzalloc(&hdev->dev, sizeof(*hidpp), GFP_KERNEL); @@ -4156,6 +4157,10 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) return ret; } + if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT || + hidpp->quirks & HIDPP_QUIRK_UNIFYING) + will_restart = true; + INIT_WORK(&hidpp->work, delayed_work_cb); mutex_init(&hidpp->send_mutex); init_waitqueue_head(&hidpp->wait); @@ -4170,7 +4175,7 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) * Plain USB connections need to actually call start and open * on the transport driver to allow incoming data. */ - ret = hid_hw_start(hdev, 0); + ret = hid_hw_start(hdev, will_restart ? 0 : connect_mask); if (ret) { hid_err(hdev, "hw start failed\n"); goto hid_hw_start_fail; @@ -4207,6 +4212,7 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) hidpp->wireless_feature_index = 0; else if (ret) goto hid_hw_init_fail; + ret = 0; } if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)) { @@ -4221,19 +4227,21 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id) hidpp_connect_event(hidpp); - /* Reset the HID node state */ - hid_device_io_stop(hdev); - hid_hw_close(hdev); - hid_hw_stop(hdev); + if (will_restart) { + /* Reset the HID node state */ + hid_device_io_stop(hdev); + hid_hw_close(hdev); + hid_hw_stop(hdev); - if (hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT) - connect_mask &= ~HID_CONNECT_HIDINPUT; + if (hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT) + connect_mask &= ~HID_CONNECT_HIDINPUT; - /* Now export the actual inputs and hidraw nodes to the world */ - ret = hid_hw_start(hdev, connect_mask); - if (ret) { - hid_err(hdev, "%s:hid_hw_start returned error\n", __func__); - goto hid_hw_start_fail; + /* Now export the actual inputs and hidraw nodes to the world */ + ret = hid_hw_start(hdev, connect_mask); + if (ret) { + hid_err(hdev, "%s:hid_hw_start returned error\n", __func__); + goto hid_hw_start_fail; + } } if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) { |