From nobody Tue Dec 16 21:58:57 2025 Received: from a.peacevolution.org (a.peacevolution.org [206.189.193.133]) (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 3B29F244E9D; Sat, 8 Feb 2025 21:26:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=206.189.193.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739050000; cv=none; b=mkCu8ams2bVQrInxnKE6wQIBpGX1XggArykG6S8S7sFJ9rX7ckVQQ9GrI7U4K+o7yXScIc7zEr8lyit76ZUcWSIY98AEUe9O73V+MJSbjZyrLpT897Ioa6JoOiMrM8CTmuhG4k0OhVNBGt5mcfcjqRUg95v4NswBvoMTOFK44Q0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739050000; c=relaxed/simple; bh=GZyHLxobtg6JhQ/Epup0iThUafaDOuPr9Nd9awNA71U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Nk864w57x2eqeyUidP74ysxnNafIvpLHPnrTxTSPcatWFXm6tYRQIfTZYNxDrMm30O1M4/gl6o2j7DZlXMIfcuqWv+LFuWwpWLZF9HbJphC4EYMuOWwIjZThYptqzmRzi6pzmvHdH9Veto0HV0LtlVYopoAa8nGD5VsxZzgWuoQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=peacevolution.org; spf=pass smtp.mailfrom=peacevolution.org; dkim=pass (1024-bit key) header.d=peacevolution.org header.i=@peacevolution.org header.b=SxsuCYAL; arc=none smtp.client-ip=206.189.193.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=peacevolution.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=peacevolution.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=peacevolution.org header.i=@peacevolution.org header.b="SxsuCYAL" Received: from authenticated-user (PRIMARY_HOSTNAME [PUBLIC_IP]) by a.peacevolution.org (Postfix) with ESMTPA id C55B741B58; Sat, 8 Feb 2025 21:16:34 +0000 (UTC) From: Aren Moynihan To: Jonathan Cameron , Lars-Peter Clausen , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: Aren Moynihan , Kaustabh Chakraborty , =?UTF-8?q?Barnab=C3=A1s=20Cz=C3=A9m=C3=A1n?= , Julien Stephan , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, Ondrej Jirman , Dragan Simic , phone-devel@vger.kernel.org Subject: [PATCH v5 2/8] iio: light: stk3310: handle all remove logic with devm callbacks Date: Sat, 8 Feb 2025 16:13:20 -0500 Message-ID: <20250208211325.992280-4-aren@peacevolution.org> In-Reply-To: <20250208211325.992280-2-aren@peacevolution.org> References: <20250208211325.992280-2-aren@peacevolution.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: auth=pass smtp.auth=aren@peacevolution.org smtp.mailfrom=aren@peacevolution.org X-Spam-Level: ***** X-Spamd-Bar: +++++ DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=peacevolution.org; s=dkim; t=1739049396; h=from:subject:date:message-id:to:cc:mime-version:content-transfer-encoding:in-reply-to:references; bh=LK3jemsDqV0sI5vp6vEaRz8iaDF3x6LJJQtbIKnsO3Q=; b=SxsuCYALuYawrH+McBMsT9cPn+MWX7JE7zYcQN7LbqqBevblVT10OP4u1jBlCGiNMaU54X MccDuTCMTMEnQsPfrOJ0jRblxrOE3L7HO0M3ZPAgrj7iV4zxJkigHUilMLW/MvnbwKYG/I hFrsW+IpFGNR6FKBkNOTK/3lyNJBG1g= Content-Type: text/plain; charset="utf-8" Using devm callbacks helps to make the ordering of probe / remove operations easier to reason about and removes some duplicate code between the probe error path and driver remove. Signed-off-by: Aren Moynihan --- Notes: Changes in v4: - also replace mutex_init with devm_mutex_init =20 Added in v3 drivers/iio/light/stk3310.c | 40 +++++++++++++++++++++---------------- 1 file changed, 23 insertions(+), 17 deletions(-) diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c index b81cc44db43c3..73ea36fa3acec 100644 --- a/drivers/iio/light/stk3310.c +++ b/drivers/iio/light/stk3310.c @@ -481,6 +481,17 @@ static int stk3310_set_state(struct stk3310_data *data= , u8 state) return ret; } =20 +static void stk3310_set_state_disable(void *private) +{ + int ret; + struct stk3310_data *data =3D private; + struct device *dev =3D &data->client->dev; + + ret =3D stk3310_set_state(data, STK3310_STATE_STANDBY); + if (ret) + dev_err(dev, "failed to set state to standby: %d\n", ret); +} + static int stk3310_init(struct iio_dev *indio_dev) { int ret; @@ -488,6 +499,7 @@ static int stk3310_init(struct iio_dev *indio_dev) u8 state; struct stk3310_data *data =3D iio_priv(indio_dev); struct i2c_client *client =3D data->client; + struct device *dev =3D &client->dev; =20 ret =3D regmap_read(data->regmap, STK3310_REG_ID, &chipid); if (ret < 0) @@ -504,6 +516,10 @@ static int stk3310_init(struct iio_dev *indio_dev) return ret; } =20 + ret =3D devm_add_action_or_reset(dev, stk3310_set_state_disable, data); + if (ret) + return dev_err_probe(dev, ret, "failed to register cleanup function\n"); + /* Enable PS interrupts */ ret =3D regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN); if (ret < 0) @@ -607,6 +623,7 @@ static int stk3310_probe(struct i2c_client *client) int ret; struct iio_dev *indio_dev; struct stk3310_data *data; + struct device *dev =3D &client->dev; =20 indio_dev =3D devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) { @@ -621,7 +638,9 @@ static int stk3310_probe(struct i2c_client *client) device_property_read_u32(&client->dev, "proximity-near-level", &data->ps_near_level); =20 - mutex_init(&data->lock); + ret =3D devm_mutex_init(dev, &data->lock); + if (ret) + return ret; =20 ret =3D stk3310_regmap_init(data); if (ret < 0) @@ -647,29 +666,17 @@ static int stk3310_probe(struct i2c_client *client) if (ret < 0) { dev_err(&client->dev, "request irq %d failed\n", client->irq); - goto err_standby; + return ret; } } =20 - ret =3D iio_device_register(indio_dev); + ret =3D devm_iio_device_register(dev, indio_dev); if (ret < 0) { dev_err(&client->dev, "device_register failed\n"); - goto err_standby; + return ret; } =20 return 0; - -err_standby: - stk3310_set_state(data, STK3310_STATE_STANDBY); - return ret; -} - -static void stk3310_remove(struct i2c_client *client) -{ - struct iio_dev *indio_dev =3D i2c_get_clientdata(client); - - iio_device_unregister(indio_dev); - stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY); } =20 static int stk3310_suspend(struct device *dev) @@ -733,7 +740,6 @@ static struct i2c_driver stk3310_driver =3D { .acpi_match_table =3D stk3310_acpi_id, }, .probe =3D stk3310_probe, - .remove =3D stk3310_remove, .id_table =3D stk3310_i2c_id, }; =20 --=20 2.48.1