From patchwork Mon May 26 12:51:26 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Ciocaltea X-Patchwork-Id: 892670 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 73CC9207A18; Mon, 26 May 2025 12:51:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748263918; cv=none; b=glCxKxNTbgsrYjvfj9J8TK6bMNENROFhqJSKDrzVqr5MUkwPJsp+Hj8eLdOhjMxMj8bDoGb2AXC7D5qyjiaWa7yiFEUBwbkBfSOxr2CfSSp8msQDtrHeTlwBl3x6LPIS84k8R1BYqYhVhhmf5mUkph1OTnFZn2ftLSDVY3L9hyU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748263918; c=relaxed/simple; bh=D6Zh6qwiZnu0F8NoTTUTar7/LLtI4Sj3UCd8uQ5ovw8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=HeXlPgXCsS01EUoXyLRMvGi+2WwOiJG4AeyDkRyNbdtZPsvZzKn6p4LP/rFUmMv1+Tx3H+9HAHd/GbwISCHU5pf8AJRlmRsm5WpvLPpjoIL5J+bOc3Rd8bjevBFcbB0K7RDa/937bBRmmqRi1OX+83yCA8dM5z3OBF6UQte9CDw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=FDNtQJF6; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="FDNtQJF6" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1748263914; bh=D6Zh6qwiZnu0F8NoTTUTar7/LLtI4Sj3UCd8uQ5ovw8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=FDNtQJF6vuIXhOmgy3lueQ1fgUuqEoP80bVqvq+Dmgy219LDVzDaQM+4Sf1C3kGr+ 0Btr66Xv7W3OndUc/kQHeTQV+b0ZlCBq6ZcWuwyZItLKyYF9/w6fCrUvCgUPNa4yOC l7iJSAyO3Bt8GTDTrrZRNlVEuwREK9p0KRDCQQ34yPfYeL/hfJiJK0oriXawpppi8w tPRRqBX3qmj3E0psEPxa1RQRSy3AsHUWnQ2FmEB2qEN23/kcCAzFNm/ObWWY73iUfx kjgfy1sYV9Qd4qKyEdCEWUh63Tg2YiVdyCU5sZbg9lka9Pj/koVgnupDgmKMztr+rV O2JqS98oqCcLA== Received: from localhost (unknown [82.76.59.134]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: cristicc) by bali.collaboradmins.com (Postfix) with UTF8SMTPSA id 783F617E36AC; Mon, 26 May 2025 14:51:54 +0200 (CEST) From: Cristian Ciocaltea Date: Mon, 26 May 2025 15:51:26 +0300 Subject: [PATCH 03/11] HID: playstation: Simplify locking with guard() and scoped_guard() Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250526-dualsense-hid-jack-v1-3-a65fee4a60cc@collabora.com> References: <20250526-dualsense-hid-jack-v1-0-a65fee4a60cc@collabora.com> In-Reply-To: <20250526-dualsense-hid-jack-v1-0-a65fee4a60cc@collabora.com> To: Roderick Colenbrander , Jiri Kosina , Benjamin Tissoires , Henrik Rydberg Cc: kernel@collabora.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 Use guard() and scoped_guard() infrastructure instead of explicitly acquiring and releasing spinlocks and mutexes to simplify the code and ensure that all locks are released properly. Signed-off-by: Cristian Ciocaltea --- drivers/hid/hid-playstation.c | 216 ++++++++++++++++++------------------------ 1 file changed, 93 insertions(+), 123 deletions(-) diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c index a82174a21dcce6523a69a8ec374a72504614cedc..16c576cc74284cc680cc7fc17e1bbe6bbcf84177 100644 --- a/drivers/hid/hid-playstation.c +++ b/drivers/hid/hid-playstation.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -567,26 +568,25 @@ static int ps_devices_list_add(struct ps_device *dev) { struct ps_device *entry; - mutex_lock(&ps_devices_lock); + guard(mutex)(&ps_devices_lock); + list_for_each_entry(entry, &ps_devices_list, list) { if (!memcmp(entry->mac_address, dev->mac_address, sizeof(dev->mac_address))) { hid_err(dev->hdev, "Duplicate device found for MAC address %pMR.\n", dev->mac_address); - mutex_unlock(&ps_devices_lock); return -EEXIST; } } list_add_tail(&dev->list, &ps_devices_list); - mutex_unlock(&ps_devices_lock); return 0; } static int ps_devices_list_remove(struct ps_device *dev) { - mutex_lock(&ps_devices_lock); + guard(mutex)(&ps_devices_lock); + list_del(&dev->list); - mutex_unlock(&ps_devices_lock); return 0; } @@ -650,13 +650,12 @@ static int ps_battery_get_property(struct power_supply *psy, struct ps_device *dev = power_supply_get_drvdata(psy); uint8_t battery_capacity; int battery_status; - unsigned long flags; int ret = 0; - spin_lock_irqsave(&dev->lock, flags); - battery_capacity = dev->battery_capacity; - battery_status = dev->battery_status; - spin_unlock_irqrestore(&dev->lock, flags); + scoped_guard(spinlock_irqsave, &dev->lock) { + battery_capacity = dev->battery_capacity; + battery_status = dev->battery_status; + } switch (psp) { case POWER_SUPPLY_PROP_STATUS: @@ -1174,19 +1173,17 @@ static int dualsense_player_led_set_brightness(struct led_classdev *led, enum le { struct hid_device *hdev = to_hid_device(led->dev->parent); struct dualsense *ds = hid_get_drvdata(hdev); - unsigned long flags; unsigned int led_index; - spin_lock_irqsave(&ds->base.lock, flags); - - led_index = led - ds->player_leds; - if (value == LED_OFF) - ds->player_leds_state &= ~BIT(led_index); - else - ds->player_leds_state |= BIT(led_index); + scoped_guard(spinlock_irqsave, &ds->base.lock) { + led_index = led - ds->player_leds; + if (value == LED_OFF) + ds->player_leds_state &= ~BIT(led_index); + else + ds->player_leds_state |= BIT(led_index); - ds->update_player_leds = true; - spin_unlock_irqrestore(&ds->base.lock, flags); + ds->update_player_leds = true; + } dualsense_schedule_work(ds); @@ -1235,12 +1232,9 @@ static void dualsense_init_output_report(struct dualsense *ds, struct dualsense_ static inline void dualsense_schedule_work(struct dualsense *ds) { - unsigned long flags; - - spin_lock_irqsave(&ds->base.lock, flags); + guard(spinlock_irqsave)(&ds->base.lock); if (ds->output_worker_initialized) schedule_work(&ds->output_worker); - spin_unlock_irqrestore(&ds->base.lock, flags); } /* @@ -1338,7 +1332,6 @@ static int dualsense_parse_report(struct ps_device *ps_dev, struct hid_report *r int battery_status; uint32_t sensor_timestamp; bool btn_mic_state; - unsigned long flags; int i; /* @@ -1400,10 +1393,10 @@ static int dualsense_parse_report(struct ps_device *ps_dev, struct hid_report *r */ btn_mic_state = !!(ds_report->buttons[2] & DS_BUTTONS2_MIC_MUTE); if (btn_mic_state && !ds->last_btn_mic_state) { - spin_lock_irqsave(&ps_dev->lock, flags); - ds->update_mic_mute = true; - ds->mic_muted = !ds->mic_muted; /* toggle */ - spin_unlock_irqrestore(&ps_dev->lock, flags); + scoped_guard(spinlock_irqsave, &ps_dev->lock) { + ds->update_mic_mute = true; + ds->mic_muted = !ds->mic_muted; /* toggle */ + } /* Schedule updating of microphone state at hardware level. */ dualsense_schedule_work(ds); @@ -1496,10 +1489,10 @@ static int dualsense_parse_report(struct ps_device *ps_dev, struct hid_report *r battery_status = POWER_SUPPLY_STATUS_UNKNOWN; } - spin_lock_irqsave(&ps_dev->lock, flags); - ps_dev->battery_capacity = battery_capacity; - ps_dev->battery_status = battery_status; - spin_unlock_irqrestore(&ps_dev->lock, flags); + scoped_guard(spinlock_irqsave, &ps_dev->lock) { + ps_dev->battery_capacity = battery_capacity; + ps_dev->battery_status = battery_status; + } return 0; } @@ -1508,16 +1501,15 @@ static int dualsense_play_effect(struct input_dev *dev, void *data, struct ff_ef { struct hid_device *hdev = input_get_drvdata(dev); struct dualsense *ds = hid_get_drvdata(hdev); - unsigned long flags; if (effect->type != FF_RUMBLE) return 0; - spin_lock_irqsave(&ds->base.lock, flags); - ds->update_rumble = true; - ds->motor_left = effect->u.rumble.strong_magnitude / 256; - ds->motor_right = effect->u.rumble.weak_magnitude / 256; - spin_unlock_irqrestore(&ds->base.lock, flags); + scoped_guard(spinlock_irqsave, &ds->base.lock) { + ds->update_rumble = true; + ds->motor_left = effect->u.rumble.strong_magnitude / 256; + ds->motor_right = effect->u.rumble.weak_magnitude / 256; + } dualsense_schedule_work(ds); return 0; @@ -1526,11 +1518,9 @@ static int dualsense_play_effect(struct input_dev *dev, void *data, struct ff_ef static void dualsense_remove(struct ps_device *ps_dev) { struct dualsense *ds = container_of(ps_dev, struct dualsense, base); - unsigned long flags; - spin_lock_irqsave(&ds->base.lock, flags); - ds->output_worker_initialized = false; - spin_unlock_irqrestore(&ds->base.lock, flags); + scoped_guard(spinlock_irqsave, &ds->base.lock) + ds->output_worker_initialized = false; cancel_work_sync(&ds->output_worker); } @@ -1562,14 +1552,12 @@ static int dualsense_reset_leds(struct dualsense *ds) static void dualsense_set_lightbar(struct dualsense *ds, uint8_t red, uint8_t green, uint8_t blue) { - unsigned long flags; - - spin_lock_irqsave(&ds->base.lock, flags); - ds->update_lightbar = true; - ds->lightbar_red = red; - ds->lightbar_green = green; - ds->lightbar_blue = blue; - spin_unlock_irqrestore(&ds->base.lock, flags); + scoped_guard(spinlock_irqsave, &ds->base.lock) { + ds->update_lightbar = true; + ds->lightbar_red = red; + ds->lightbar_green = green; + ds->lightbar_blue = blue; + } dualsense_schedule_work(ds); } @@ -1756,7 +1744,6 @@ static struct ps_device *dualsense_create(struct hid_device *hdev) static void dualshock4_dongle_calibration_work(struct work_struct *work) { struct dualshock4 *ds4 = container_of(work, struct dualshock4, dongle_hotplug_worker); - unsigned long flags; enum dualshock4_dongle_state dongle_state; int ret; @@ -1775,9 +1762,8 @@ static void dualshock4_dongle_calibration_work(struct work_struct *work) dongle_state = DONGLE_CONNECTED; } - spin_lock_irqsave(&ds4->base.lock, flags); - ds4->dongle_state = dongle_state; - spin_unlock_irqrestore(&ds4->base.lock, flags); + scoped_guard(spinlock_irqsave, &ds4->base.lock) + ds4->dongle_state = dongle_state; } static int dualshock4_get_calibration_data(struct dualshock4 *ds4) @@ -2049,26 +2035,23 @@ static int dualshock4_led_set_blink(struct led_classdev *led, unsigned long *del { struct hid_device *hdev = to_hid_device(led->dev->parent); struct dualshock4 *ds4 = hid_get_drvdata(hdev); - unsigned long flags; - spin_lock_irqsave(&ds4->base.lock, flags); + scoped_guard(spinlock_irqsave, &ds4->base.lock) { + if (!*delay_on && !*delay_off) { + /* Default to 1 Hz (50 centiseconds on, 50 centiseconds off). */ + ds4->lightbar_blink_on = 50; + ds4->lightbar_blink_off = 50; + } else { + /* Blink delays in centiseconds. */ + ds4->lightbar_blink_on = min_t(unsigned long, *delay_on / 10, + DS4_LIGHTBAR_MAX_BLINK); + ds4->lightbar_blink_off = min_t(unsigned long, *delay_off / 10, + DS4_LIGHTBAR_MAX_BLINK); + } - if (!*delay_on && !*delay_off) { - /* Default to 1 Hz (50 centiseconds on, 50 centiseconds off). */ - ds4->lightbar_blink_on = 50; - ds4->lightbar_blink_off = 50; - } else { - /* Blink delays in centiseconds. */ - ds4->lightbar_blink_on = min_t(unsigned long, *delay_on / 10, - DS4_LIGHTBAR_MAX_BLINK); - ds4->lightbar_blink_off = min_t(unsigned long, *delay_off / 10, - DS4_LIGHTBAR_MAX_BLINK); + ds4->update_lightbar_blink = true; } - ds4->update_lightbar_blink = true; - - spin_unlock_irqrestore(&ds4->base.lock, flags); - dualshock4_schedule_work(ds4); /* Report scaled values back to LED subsystem */ @@ -2082,36 +2065,33 @@ static int dualshock4_led_set_brightness(struct led_classdev *led, enum led_brig { struct hid_device *hdev = to_hid_device(led->dev->parent); struct dualshock4 *ds4 = hid_get_drvdata(hdev); - unsigned long flags; unsigned int led_index; - spin_lock_irqsave(&ds4->base.lock, flags); - - led_index = led - ds4->lightbar_leds; - switch (led_index) { - case 0: - ds4->lightbar_red = value; - break; - case 1: - ds4->lightbar_green = value; - break; - case 2: - ds4->lightbar_blue = value; - break; - case 3: - ds4->lightbar_enabled = !!value; - - /* brightness = 0 also cancels blinking in Linux. */ - if (!ds4->lightbar_enabled) { - ds4->lightbar_blink_off = 0; - ds4->lightbar_blink_on = 0; - ds4->update_lightbar_blink = true; + scoped_guard(spinlock_irqsave, &ds4->base.lock) { + led_index = led - ds4->lightbar_leds; + switch (led_index) { + case 0: + ds4->lightbar_red = value; + break; + case 1: + ds4->lightbar_green = value; + break; + case 2: + ds4->lightbar_blue = value; + break; + case 3: + ds4->lightbar_enabled = !!value; + + /* brightness = 0 also cancels blinking in Linux. */ + if (!ds4->lightbar_enabled) { + ds4->lightbar_blink_off = 0; + ds4->lightbar_blink_on = 0; + ds4->update_lightbar_blink = true; + } } - } - - ds4->update_lightbar = true; - spin_unlock_irqrestore(&ds4->base.lock, flags); + ds4->update_lightbar = true; + } dualshock4_schedule_work(ds4); @@ -2243,7 +2223,6 @@ static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report * uint8_t battery_capacity, num_touch_reports, value; int battery_status, i, j; uint16_t sensor_timestamp; - unsigned long flags; bool is_minimal = false; /* @@ -2421,10 +2400,10 @@ static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report * battery_status = POWER_SUPPLY_STATUS_DISCHARGING; } - spin_lock_irqsave(&ps_dev->lock, flags); - ps_dev->battery_capacity = battery_capacity; - ps_dev->battery_status = battery_status; - spin_unlock_irqrestore(&ps_dev->lock, flags); + scoped_guard(spinlock_irqsave, &ps_dev->lock) { + ps_dev->battery_capacity = battery_capacity; + ps_dev->battery_status = battery_status; + } return 0; } @@ -2442,7 +2421,6 @@ static int dualshock4_dongle_parse_report(struct ps_device *ps_dev, struct hid_r */ if (data[0] == DS4_INPUT_REPORT_USB && size == DS4_INPUT_REPORT_USB_SIZE) { struct dualshock4_input_report_common *ds4_report = (struct dualshock4_input_report_common *)&data[1]; - unsigned long flags; connected = ds4_report->status[1] & DS4_STATUS1_DONGLE_STATE ? false : true; @@ -2451,9 +2429,8 @@ static int dualshock4_dongle_parse_report(struct ps_device *ps_dev, struct hid_r dualshock4_set_default_lightbar_colors(ds4); - spin_lock_irqsave(&ps_dev->lock, flags); - ds4->dongle_state = DONGLE_CALIBRATING; - spin_unlock_irqrestore(&ps_dev->lock, flags); + scoped_guard(spinlock_irqsave, &ps_dev->lock) + ds4->dongle_state = DONGLE_CALIBRATING; schedule_work(&ds4->dongle_hotplug_worker); @@ -2465,9 +2442,8 @@ static int dualshock4_dongle_parse_report(struct ps_device *ps_dev, struct hid_r ds4->dongle_state == DONGLE_DISABLED) && !connected) { hid_info(ps_dev->hdev, "DualShock 4 USB dongle: controller disconnected\n"); - spin_lock_irqsave(&ps_dev->lock, flags); - ds4->dongle_state = DONGLE_DISCONNECTED; - spin_unlock_irqrestore(&ps_dev->lock, flags); + scoped_guard(spinlock_irqsave, &ps_dev->lock) + ds4->dongle_state = DONGLE_DISCONNECTED; /* Return 0, so hidraw can get the report. */ return 0; @@ -2489,16 +2465,15 @@ static int dualshock4_play_effect(struct input_dev *dev, void *data, struct ff_e { struct hid_device *hdev = input_get_drvdata(dev); struct dualshock4 *ds4 = hid_get_drvdata(hdev); - unsigned long flags; if (effect->type != FF_RUMBLE) return 0; - spin_lock_irqsave(&ds4->base.lock, flags); - ds4->update_rumble = true; - ds4->motor_left = effect->u.rumble.strong_magnitude / 256; - ds4->motor_right = effect->u.rumble.weak_magnitude / 256; - spin_unlock_irqrestore(&ds4->base.lock, flags); + scoped_guard(spinlock_irqsave, &ds4->base.lock) { + ds4->update_rumble = true; + ds4->motor_left = effect->u.rumble.strong_magnitude / 256; + ds4->motor_right = effect->u.rumble.weak_magnitude / 256; + } dualshock4_schedule_work(ds4); return 0; @@ -2507,11 +2482,9 @@ static int dualshock4_play_effect(struct input_dev *dev, void *data, struct ff_e static void dualshock4_remove(struct ps_device *ps_dev) { struct dualshock4 *ds4 = container_of(ps_dev, struct dualshock4, base); - unsigned long flags; - spin_lock_irqsave(&ds4->base.lock, flags); - ds4->output_worker_initialized = false; - spin_unlock_irqrestore(&ds4->base.lock, flags); + scoped_guard(spinlock_irqsave, &ds4->base.lock) + ds4->output_worker_initialized = false; cancel_work_sync(&ds4->output_worker); @@ -2521,12 +2494,9 @@ static void dualshock4_remove(struct ps_device *ps_dev) static inline void dualshock4_schedule_work(struct dualshock4 *ds4) { - unsigned long flags; - - spin_lock_irqsave(&ds4->base.lock, flags); + guard(spinlock_irqsave)(&ds4->base.lock); if (ds4->output_worker_initialized) schedule_work(&ds4->output_worker); - spin_unlock_irqrestore(&ds4->base.lock, flags); } static void dualshock4_set_bt_poll_interval(struct dualshock4 *ds4, uint8_t interval)