From patchwork Thu May 2 21:14:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 13652108 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 D23CD181313 for ; Thu, 2 May 2024 21:14:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684479; cv=none; b=U1jkArpn+XDHihQKmRascyVpXbMJwzTiePMFqXodsyUJzIV+Gg4rBs9V8Az7v9QdzWipv8iyHQbxPGSOy+1ZkiJnudKKMzDzmnXESggh5v7qEp1TmmfL4pEXBuk+fQFpHmZZNo49jJHgnlODT/cLioW/Fq2e3Y5msTXmtByHtF8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714684479; c=relaxed/simple; bh=1S+4GNAUpKXds7LcVmMe/jrs2SUyekeWRn931fwnhR8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SJkNMZiY8M+6LajISJJS4eHn20cLeruciWm2lw4mvyJj26sY2ZYd3gNEtMGumpgKMSv7SciUjQRsXXSFDTepChQo/vEpr3xlkT/dq6O6DFPqdM0Qxc/3YoDd71ifC5ZSdY+nM5NnNGJHH0Lx4o/wz8csIL20j5JGMJDyMYHTe1A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Lyz4gmHi; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Lyz4gmHi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1714684475; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ckF8SmGaQ0kzJOrgoMLDkNyaWhgKpKt8VrEVFWryMwc=; b=Lyz4gmHiaRPj3pzxS1ewTUZlx+Q7+g46DIbG99fBjKuEFef0HTaDLRB0Grb7skxddRN7Xr wqfynH46ZgFDncAYk1Nn29nZLJHoZg8SSTck6N0CdtfxbhMujtRHtdWA6VizUSPTME8Ckz YNsU7JhpTU9sjMaW1JLFft9VmnW0izI= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-258-sda8g02mNUSwXxz-Kbw2bg-1; Thu, 02 May 2024 17:14:32 -0400 X-MC-Unique: sda8g02mNUSwXxz-Kbw2bg-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2AE313C0256A; Thu, 2 May 2024 21:14:32 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.33]) by smtp.corp.redhat.com (Postfix) with ESMTP id CDDD340BAA2; Thu, 2 May 2024 21:14:30 +0000 (UTC) From: Hans de Goede To: =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Andy Shevchenko , Pavel Machek , Lee Jones , Kate Hsuan , Sebastian Reichel Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, =?utf-8?q?Andr=C3=A9_Apitzsch?= , linux-leds@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v8 3/7] leds: rgb: leds-ktd202x: Initialize mutex earlier Date: Thu, 2 May 2024 23:14:21 +0200 Message-ID: <20240502211425.8678-4-hdegoede@redhat.com> In-Reply-To: <20240502211425.8678-1-hdegoede@redhat.com> References: <20240502211425.8678-1-hdegoede@redhat.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 The mutex must be initialized before the LED class device is registered otherwise there is a race where it may get used before it is initialized: DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: CPU: 2 PID: 2045 at kernel/locking/mutex.c:587 __mutex_lock ... RIP: 0010:__mutex_lock+0x7db/0xc10 ... set_brightness_delayed_set_brightness.part.0+0x17/0x60 set_brightness_delayed+0xf1/0x100 process_one_work+0x222/0x5a0 Signed-off-by: Hans de Goede --- drivers/leds/rgb/leds-ktd202x.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/leds/rgb/leds-ktd202x.c b/drivers/leds/rgb/leds-ktd202x.c index 60ca6ec34336..77247a98fe66 100644 --- a/drivers/leds/rgb/leds-ktd202x.c +++ b/drivers/leds/rgb/leds-ktd202x.c @@ -572,21 +572,25 @@ static int ktd202x_probe(struct i2c_client *client) return ret; } + mutex_init(&chip->mutex); + ret = ktd202x_probe_fw(chip); if (ret < 0) { regulator_bulk_disable(ARRAY_SIZE(chip->regulators), chip->regulators); - return ret; + goto destroy_mutex; } ret = regulator_bulk_disable(ARRAY_SIZE(chip->regulators), chip->regulators); if (ret) { dev_err_probe(dev, ret, "Failed to disable regulators.\n"); - return ret; + goto destroy_mutex; } - mutex_init(&chip->mutex); - return 0; + +destroy_mutex: + mutex_destroy(&chip->mutex); + return ret; } static void ktd202x_remove(struct i2c_client *client)