From patchwork Wed Dec 2 10:07:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 7744191 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 39262BEEE1 for ; Wed, 2 Dec 2015 10:12:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4A83020638 for ; Wed, 2 Dec 2015 10:12:17 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8C21320501 for ; Wed, 2 Dec 2015 10:12:08 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1a44MP-0003Sm-CA; Wed, 02 Dec 2015 10:10:05 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1a44K9-0000t7-PT for linux-arm-kernel@lists.infradead.org; Wed, 02 Dec 2015 10:07:52 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1a44Jf-0001Ik-Po; Wed, 02 Dec 2015 11:07:15 +0100 Received: from ukl by dude.hi.pengutronix.de with local (Exim 4.86) (envelope-from ) id 1a44Jn-0008HN-Su; Wed, 02 Dec 2015 11:07:23 +0100 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= To: =?UTF-8?q?Guido=20Mart=C3=ADnez?= , Ezequiel Garcia , Rob Herring , Dmitry Torokhov , Sylvain Rochet , Johan Hovold , Daniel Mack , Haojian Zhuang , Robert Jarzmik Subject: [PATCH RFC 1/3] input: rotary_encoder: make use of devm_* to simplify .probe and .remove Date: Wed, 2 Dec 2015 11:07:12 +0100 Message-Id: <1449050834-31779-2-git-send-email-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.6.2 In-Reply-To: <1449050834-31779-1-git-send-email-u.kleine-koenig@pengutronix.de> References: <1449050834-31779-1-git-send-email-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151202_020746_559373_0180AB9B X-CRM114-Status: GOOD ( 16.65 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For all operations called in .probe there are devm_* variants. (input_register_device is clever enough to be devm aware on its own.) This allows to get rid of the error unwind code paths in .probe and the complete .remove function. Signed-off-by: Uwe Kleine-König --- drivers/input/misc/rotary_encoder.c | 74 +++++++++++-------------------------- 1 file changed, 22 insertions(+), 52 deletions(-) diff --git a/drivers/input/misc/rotary_encoder.c b/drivers/input/misc/rotary_encoder.c index 8aee71986430..386bdb5314e6 100644 --- a/drivers/input/misc/rotary_encoder.c +++ b/drivers/input/misc/rotary_encoder.c @@ -211,8 +211,8 @@ static struct rotary_encoder_platform_data *rotary_encoder_parse_dt(struct devic if (!of_id || !np) return NULL; - pdata = kzalloc(sizeof(struct rotary_encoder_platform_data), - GFP_KERNEL); + pdata = devm_kzalloc(dev, sizeof(struct rotary_encoder_platform_data), + GFP_KERNEL); if (!pdata) return ERR_PTR(-ENOMEM); @@ -277,11 +277,11 @@ static int rotary_encoder_probe(struct platform_device *pdev) } } - encoder = kzalloc(sizeof(struct rotary_encoder), GFP_KERNEL); - input = input_allocate_device(); + encoder = devm_kzalloc(dev, sizeof(struct rotary_encoder), GFP_KERNEL); + input = devm_input_allocate_device(&pdev->dev); if (!encoder || !input) { - err = -ENOMEM; - goto exit_free_mem; + dev_err(dev, "unable to allocate memory\n"); + return -ENOMEM; } encoder->input = input; @@ -301,16 +301,18 @@ static int rotary_encoder_probe(struct platform_device *pdev) } /* request the GPIOs */ - err = gpio_request_one(pdata->gpio_a, GPIOF_IN, dev_name(dev)); + err = devm_gpio_request_one(dev, pdata->gpio_a, + GPIOF_IN, dev_name(dev)); if (err) { dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_a); - goto exit_free_mem; + return err; } - err = gpio_request_one(pdata->gpio_b, GPIOF_IN, dev_name(dev)); + err = devm_gpio_request_one(dev, pdata->gpio_b, + GPIOF_IN, dev_name(dev)); if (err) { dev_err(dev, "unable to request GPIO %d\n", pdata->gpio_b); - goto exit_free_gpio_a; + return err; } encoder->irq_a = gpio_to_irq(pdata->gpio_a); @@ -331,30 +333,29 @@ static int rotary_encoder_probe(struct platform_device *pdev) default: dev_err(dev, "'%d' is not a valid steps-per-period value\n", pdata->steps_per_period); - err = -EINVAL; - goto exit_free_gpio_b; + return -EINVAL; } - err = request_irq(encoder->irq_a, handler, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - DRV_NAME, encoder); + err = devm_request_irq(dev, encoder->irq_a, handler, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + DRV_NAME, encoder); if (err) { dev_err(dev, "unable to request IRQ %d\n", encoder->irq_a); - goto exit_free_gpio_b; + return err; } - err = request_irq(encoder->irq_b, handler, - IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, - DRV_NAME, encoder); + err = devm_request_irq(dev, encoder->irq_b, handler, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, + DRV_NAME, encoder); if (err) { dev_err(dev, "unable to request IRQ %d\n", encoder->irq_b); - goto exit_free_irq_a; + return err; } err = input_register_device(input); if (err) { dev_err(dev, "failed to register input device\n"); - goto exit_free_irq_b; + return err; } device_init_wakeup(&pdev->dev, pdata->wakeup_source); @@ -362,42 +363,11 @@ static int rotary_encoder_probe(struct platform_device *pdev) platform_set_drvdata(pdev, encoder); return 0; - -exit_free_irq_b: - free_irq(encoder->irq_b, encoder); -exit_free_irq_a: - free_irq(encoder->irq_a, encoder); -exit_free_gpio_b: - gpio_free(pdata->gpio_b); -exit_free_gpio_a: - gpio_free(pdata->gpio_a); -exit_free_mem: - input_free_device(input); - kfree(encoder); - if (!dev_get_platdata(&pdev->dev)) - kfree(pdata); - - return err; } static int rotary_encoder_remove(struct platform_device *pdev) { - struct rotary_encoder *encoder = platform_get_drvdata(pdev); - const struct rotary_encoder_platform_data *pdata = encoder->pdata; - device_init_wakeup(&pdev->dev, false); - - free_irq(encoder->irq_a, encoder); - free_irq(encoder->irq_b, encoder); - gpio_free(pdata->gpio_a); - gpio_free(pdata->gpio_b); - - input_unregister_device(encoder->input); - kfree(encoder); - - if (!dev_get_platdata(&pdev->dev)) - kfree(pdata); - return 0; }