From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alek Du Subject: [PATCH v2] INPUT: Change timer function to workqueue for gpio_keys driver Date: Thu, 11 Jun 2009 15:41:29 +0800 Message-ID: <20090611154129.29cb1e2d@dxy.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 8BIT Return-path: Received: from mga03.intel.com ([143.182.124.21]:33511 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751579AbZFKHrI convert rfc822-to-8bit (ORCPT ); Thu, 11 Jun 2009 03:47:08 -0400 Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: dmitry.torokhov@gmail.com, linux-input@vger.kernel.org >>From d1ed6162cf483968d2d22d9ae400f8dacd72dba8 Mon Sep 17 00:00:00 2001 From: Alek Du Date: Fri, 8 May 2009 12:25:34 +0800 Subject: [PATCH] INPUT: Change timer function to workqueue for gpio_keys driver The gpio_get_value function of I2C/SPI GPIO expander may sleep thus this function call can not be called in a timer function. Signed-off-by: Alek Du --- drivers/input/keyboard/gpio_keys.c | 32 ++++++++++++++------------------ 1 files changed, 14 insertions(+), 18 deletions(-) diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c index ad67d76..5e9fb79 100644 --- a/drivers/input/keyboard/gpio_keys.c +++ b/drivers/input/keyboard/gpio_keys.c @@ -22,13 +22,17 @@ #include #include #include +#include #include struct gpio_button_data { struct gpio_keys_button *button; struct input_dev *input; - struct timer_list timer; +/* Change timer func to workqueue func due to the fact that gpio_get_value + * may block for some i2c and spi GPIO expander + */ + struct delayed_work work; }; struct gpio_keys_drvdata { @@ -36,8 +40,10 @@ struct gpio_keys_drvdata { struct gpio_button_data data[0]; }; -static void gpio_keys_report_event(struct gpio_button_data *bdata) +static void gpio_keys_report_event(struct work_struct *work) { + struct gpio_button_data *bdata = container_of(work, + struct gpio_button_data, work.work); struct gpio_keys_button *button = bdata->button; struct input_dev *input = bdata->input; unsigned int type = button->type ?: EV_KEY; @@ -47,13 +53,6 @@ static void gpio_keys_report_event(struct gpio_button_data *bdata) input_sync(input); } -static void gpio_check_button(unsigned long _data) -{ - struct gpio_button_data *data = (struct gpio_button_data *)_data; - - gpio_keys_report_event(data); -} - static irqreturn_t gpio_keys_isr(int irq, void *dev_id) { struct gpio_button_data *bdata = dev_id; @@ -62,10 +61,10 @@ static irqreturn_t gpio_keys_isr(int irq, void *dev_id) BUG_ON(irq != gpio_to_irq(button->gpio)); if (button->debounce_interval) - mod_timer(&bdata->timer, - jiffies + msecs_to_jiffies(button->debounce_interval)); + schedule_delayed_work(&bdata->work, + msecs_to_jiffies(button->debounce_interval)); else - gpio_keys_report_event(bdata); + schedule_delayed_work(&bdata->work, 0); return IRQ_HANDLED; } @@ -112,8 +111,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) bdata->input = input; bdata->button = button; - setup_timer(&bdata->timer, - gpio_check_button, (unsigned long)bdata); + INIT_DELAYED_WORK(&bdata->work, gpio_keys_report_event); error = gpio_request(button->gpio, button->desc ?: "gpio_keys"); if (error < 0) { @@ -173,8 +171,7 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev) fail2: while (--i >= 0) { free_irq(gpio_to_irq(pdata->buttons[i].gpio), &ddata->data[i]); - if (pdata->buttons[i].debounce_interval) - del_timer_sync(&ddata->data[i].timer); + cancel_delayed_work_sync(&ddata->data[i].work); gpio_free(pdata->buttons[i].gpio); } @@ -198,8 +195,7 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev) for (i = 0; i < pdata->nbuttons; i++) { int irq = gpio_to_irq(pdata->buttons[i].gpio); free_irq(irq, &ddata->data[i]); - if (pdata->buttons[i].debounce_interval) - del_timer_sync(&ddata->data[i].timer); + cancel_delayed_work_sync(&ddata->data[i].work); gpio_free(pdata->buttons[i].gpio); } -- 1.6.0.4