From patchwork Mon Jul 18 16:45:07 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Guo X-Patchwork-Id: 987132 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p6IGZOHw015134 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 18 Jul 2011 16:35:45 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qiqmp-0003qI-4W; Mon, 18 Jul 2011 16:35:15 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qiqmo-0007em-Lo; Mon, 18 Jul 2011 16:35:14 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qiqmg-0007dD-Ca for linux-arm-kernel@canuck.infradead.org; Mon, 18 Jul 2011 16:35:06 +0000 Received: from mail-iy0-f177.google.com ([209.85.210.177]) by casper.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QiqmZ-0005Qc-G4 for linux-arm-kernel@lists.infradead.org; Mon, 18 Jul 2011 16:35:04 +0000 Received: by iyn15 with SMTP id 15so3664088iyn.36 for ; Mon, 18 Jul 2011 09:34:07 -0700 (PDT) Received: by 10.42.135.10 with SMTP id n10mr7583529ict.420.1311006847185; Mon, 18 Jul 2011 09:34:07 -0700 (PDT) Received: from localhost.localdomain ([114.216.147.56]) by mx.google.com with ESMTPS id v16sm3019187ibe.34.2011.07.18.09.33.47 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 18 Jul 2011 09:34:06 -0700 (PDT) From: Shawn Guo To: linux-input@vger.kernel.org Subject: [PATCH 1/2] Input: gpio-keys: do not reference platform_data after .probe exits Date: Tue, 19 Jul 2011 00:45:07 +0800 Message-Id: <1311007508-8096-2-git-send-email-shawn.guo@linaro.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1311007508-8096-1-git-send-email-shawn.guo@linaro.org> References: <1311007508-8096-1-git-send-email-shawn.guo@linaro.org> X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110718_173459_878727_53AFA6A0 X-CRM114-Status: GOOD ( 18.73 ) X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on casper.infradead.org summary: Content analysis details: (-2.6 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.210.177 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: patches@linaro.org, Dmitry Torokhov , devicetree-discuss@lists.ozlabs.org, Phil Blundell , Shawn Guo , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Mon, 18 Jul 2011 16:35:45 +0000 (UTC) The patch makes a copy of platform data into driver data, so that any reference to platform_data after .probe exits can be avoided. Signed-off-by: Shawn Guo Cc: Phil Blundell Cc: Dmitry Torokhov --- drivers/input/keyboard/gpio_keys.c | 45 +++++++++++++++++------------------ 1 files changed, 22 insertions(+), 23 deletions(-) diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index 97bada4..85b5685 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -27,7 +27,7 @@ #include struct gpio_button_data { - struct gpio_keys_button *button; + struct gpio_keys_button button; struct input_dev *input; struct timer_list timer; struct work_struct work; @@ -111,7 +111,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata) /* * Disable IRQ and possible debouncing timer. */ - disable_irq(gpio_to_irq(bdata->button->gpio)); + disable_irq(gpio_to_irq(bdata->button.gpio)); if (bdata->timer_debounce) del_timer_sync(&bdata->timer); @@ -132,7 +132,7 @@ static void gpio_keys_disable_button(struct gpio_button_data *bdata) static void gpio_keys_enable_button(struct gpio_button_data *bdata) { if (bdata->disabled) { - enable_irq(gpio_to_irq(bdata->button->gpio)); + enable_irq(gpio_to_irq(bdata->button.gpio)); bdata->disabled = false; } } @@ -167,13 +167,13 @@ static ssize_t gpio_keys_attr_show_helper(struct gpio_keys_drvdata *ddata, for (i = 0; i < ddata->n_buttons; i++) { struct gpio_button_data *bdata = &ddata->data[i]; - if (bdata->button->type != type) + if (bdata->button.type != type) continue; if (only_disabled && !bdata->disabled) continue; - __set_bit(bdata->button->code, bits); + __set_bit(bdata->button.code, bits); } ret = bitmap_scnlistprintf(buf, PAGE_SIZE - 2, bits, n_events); @@ -215,11 +215,11 @@ static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata, for (i = 0; i < ddata->n_buttons; i++) { struct gpio_button_data *bdata = &ddata->data[i]; - if (bdata->button->type != type) + if (bdata->button.type != type) continue; - if (test_bit(bdata->button->code, bits) && - !bdata->button->can_disable) { + if (test_bit(bdata->button.code, bits) && + !bdata->button.can_disable) { error = -EINVAL; goto out; } @@ -230,10 +230,10 @@ static ssize_t gpio_keys_attr_store_helper(struct gpio_keys_drvdata *ddata, for (i = 0; i < ddata->n_buttons; i++) { struct gpio_button_data *bdata = &ddata->data[i]; - if (bdata->button->type != type) + if (bdata->button.type != type) continue; - if (test_bit(bdata->button->code, bits)) + if (test_bit(bdata->button.code, bits)) gpio_keys_disable_button(bdata); else gpio_keys_enable_button(bdata); @@ -319,7 +319,7 @@ static struct attribute_group gpio_keys_attr_group = { static void gpio_keys_report_event(struct gpio_button_data *bdata) { - struct gpio_keys_button *button = bdata->button; + struct gpio_keys_button *button = &bdata->button; struct input_dev *input = bdata->input; unsigned int type = button->type ?: EV_KEY; int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0) ^ button->active_low; @@ -351,7 +351,7 @@ static void gpio_keys_timer(unsigned long _data) static irqreturn_t gpio_keys_isr(int irq, void *dev_id) { struct gpio_button_data *bdata = dev_id; - struct gpio_keys_button *button = bdata->button; + struct gpio_keys_button *button = &bdata->button; BUG_ON(irq != gpio_to_irq(button->gpio)); @@ -494,7 +494,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) unsigned int type = button->type ?: EV_KEY; bdata->input = input; - bdata->button = button; + bdata->button = *button; error = gpio_keys_setup_key(pdev, bdata, button); if (error) @@ -550,7 +550,6 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) static int __devexit gpio_keys_remove(struct platform_device *pdev) { - struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); struct input_dev *input = ddata->input; int i; @@ -559,13 +558,13 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 0); - for (i = 0; i < pdata->nbuttons; i++) { - int irq = gpio_to_irq(pdata->buttons[i].gpio); + for (i = 0; i < ddata->n_buttons; i++) { + int irq = gpio_to_irq(ddata->data[i].button.gpio); free_irq(irq, &ddata->data[i]); if (ddata->data[i].timer_debounce) del_timer_sync(&ddata->data[i].timer); cancel_work_sync(&ddata->data[i].work); - gpio_free(pdata->buttons[i].gpio); + gpio_free(ddata->data[i].button.gpio); } input_unregister_device(input); @@ -579,12 +578,13 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) static int gpio_keys_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); - struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; + struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); int i; if (device_may_wakeup(&pdev->dev)) { - for (i = 0; i < pdata->nbuttons; i++) { - struct gpio_keys_button *button = &pdata->buttons[i]; + for (i = 0; i < ddata->n_buttons; i++) { + struct gpio_keys_button *button = + &ddata->data[i].button; if (button->wakeup) { int irq = gpio_to_irq(button->gpio); enable_irq_wake(irq); @@ -599,12 +599,11 @@ static int gpio_keys_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct gpio_keys_drvdata *ddata = platform_get_drvdata(pdev); - struct gpio_keys_platform_data *pdata = pdev->dev.platform_data; int i; - for (i = 0; i < pdata->nbuttons; i++) { + for (i = 0; i < ddata->n_buttons; i++) { - struct gpio_keys_button *button = &pdata->buttons[i]; + struct gpio_keys_button *button = &ddata->data[i].button; if (button->wakeup && device_may_wakeup(&pdev->dev)) { int irq = gpio_to_irq(button->gpio); disable_irq_wake(irq);