From cc070a847bc0b6fb66e4c05b5bd036d2ea80fb9a Mon Sep 17 00:00:00 2001 From: Hanno Zulla Date: Thu, 14 Jun 2018 16:29:08 +0200 Subject: HID: hid-sony.c: Use devm_ api to simplify sony_register_touchpad() HID: hid-sony.c: Use devm_ api to simplify sony_register_touchpad() Using devm_ calls, the resources of the Sony game devices's features are tied to the main device handle, making it easier to handle errors and teardown inside the device driver. Altogether, this reduces complexity of the driver source. Signed-off-by: Hanno Zulla Reviewed-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- drivers/hid/hid-sony.c | 40 ++++++---------------------------------- 1 file changed, 6 insertions(+), 34 deletions(-) (limited to 'drivers/hid') diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index e475c5073c99..f14286e62e15 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -1353,7 +1353,7 @@ static int sony_register_touchpad(struct sony_sc *sc, int touch_count, char *name; int ret; - sc->touchpad = input_allocate_device(); + sc->touchpad = devm_input_allocate_device(&sc->hdev->dev); if (!sc->touchpad) return -ENOMEM; @@ -1370,11 +1370,9 @@ static int sony_register_touchpad(struct sony_sc *sc, int touch_count, * DS4 compatible non-Sony devices with different names. */ name_sz = strlen(sc->hdev->name) + sizeof(DS4_TOUCHPAD_SUFFIX); - name = kzalloc(name_sz, GFP_KERNEL); - if (!name) { - ret = -ENOMEM; - goto err; - } + name = devm_kzalloc(&sc->hdev->dev, name_sz, GFP_KERNEL); + if (!name) + return -ENOMEM; snprintf(name, name_sz, "%s" DS4_TOUCHPAD_SUFFIX, sc->hdev->name); sc->touchpad->name = name; @@ -1403,34 +1401,13 @@ static int sony_register_touchpad(struct sony_sc *sc, int touch_count, ret = input_mt_init_slots(sc->touchpad, touch_count, INPUT_MT_POINTER); if (ret < 0) - goto err; + return ret; ret = input_register_device(sc->touchpad); if (ret < 0) - goto err; + return ret; return 0; - -err: - kfree(sc->touchpad->name); - sc->touchpad->name = NULL; - - input_free_device(sc->touchpad); - sc->touchpad = NULL; - - return ret; -} - -static void sony_unregister_touchpad(struct sony_sc *sc) -{ - if (!sc->touchpad) - return; - - kfree(sc->touchpad->name); - sc->touchpad->name = NULL; - - input_unregister_device(sc->touchpad); - sc->touchpad = NULL; } static int sony_register_sensors(struct sony_sc *sc) @@ -2883,8 +2860,6 @@ err_stop: sony_leds_remove(sc); if (sc->quirks & SONY_BATTERY_SUPPORT) sony_battery_remove(sc); - if (sc->touchpad) - sony_unregister_touchpad(sc); if (sc->sensor_dev) sony_unregister_sensors(sc); sony_cancel_work_sync(sc); @@ -2971,9 +2946,6 @@ static void sony_remove(struct hid_device *hdev) if (sc->quirks & SONY_BATTERY_SUPPORT) sony_battery_remove(sc); - if (sc->touchpad) - sony_unregister_touchpad(sc); - if (sc->sensor_dev) sony_unregister_sensors(sc); -- cgit v1.2.3-59-g8ed1b