43829731dd
flush[_delayed]_work_sync() are now spurious. Mark them deprecated and convert all users to flush[_delayed]_work(). If you're cc'd and wondering what's going on: Now all workqueues are non-reentrant and the regular flushes guarantee that the work item is not pending or running on any CPU on return, so there's no reason to use the sync flushes at all and they're going away. This patch doesn't make any functional difference. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Mattia Dongili <malattia@linux.it> Cc: Kent Yoder <key@linux.vnet.ibm.com> Cc: David Airlie <airlied@linux.ie> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: Bryan Wu <bryan.wu@canonical.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: linux-wireless@vger.kernel.org Cc: Anton Vorontsov <cbou@mail.ru> Cc: Sangbeom Kim <sbkim73@samsung.com> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Takashi Iwai <tiwai@suse.de> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Petr Vandrovec <petr@vandrovec.name> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Avi Kivity <avi@redhat.com>
143 lines
3.1 KiB
C
143 lines
3.1 KiB
C
/*
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* Generic push-switch framework
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*
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* Copyright (C) 2006 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <asm/push-switch.h>
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#define DRV_NAME "push-switch"
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#define DRV_VERSION "0.1.1"
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static ssize_t switch_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct push_switch_platform_info *psw_info = dev->platform_data;
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return sprintf(buf, "%s\n", psw_info->name);
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}
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static DEVICE_ATTR(switch, S_IRUGO, switch_show, NULL);
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static void switch_timer(unsigned long data)
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{
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struct push_switch *psw = (struct push_switch *)data;
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schedule_work(&psw->work);
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}
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static void switch_work_handler(struct work_struct *work)
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{
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struct push_switch *psw = container_of(work, struct push_switch, work);
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struct platform_device *pdev = psw->pdev;
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psw->state = 0;
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kobject_uevent(&pdev->dev.kobj, KOBJ_CHANGE);
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}
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static int switch_drv_probe(struct platform_device *pdev)
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{
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struct push_switch_platform_info *psw_info;
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struct push_switch *psw;
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int ret, irq;
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psw = kzalloc(sizeof(struct push_switch), GFP_KERNEL);
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if (unlikely(!psw))
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return -ENOMEM;
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irq = platform_get_irq(pdev, 0);
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if (unlikely(irq < 0)) {
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ret = -ENODEV;
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goto err;
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}
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psw_info = pdev->dev.platform_data;
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BUG_ON(!psw_info);
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ret = request_irq(irq, psw_info->irq_handler,
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psw_info->irq_flags,
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psw_info->name ? psw_info->name : DRV_NAME, pdev);
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if (unlikely(ret < 0))
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goto err;
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if (psw_info->name) {
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ret = device_create_file(&pdev->dev, &dev_attr_switch);
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if (unlikely(ret)) {
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dev_err(&pdev->dev, "Failed creating device attrs\n");
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ret = -EINVAL;
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goto err_irq;
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}
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}
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INIT_WORK(&psw->work, switch_work_handler);
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init_timer(&psw->debounce);
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psw->debounce.function = switch_timer;
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psw->debounce.data = (unsigned long)psw;
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/* Workqueue API brain-damage */
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psw->pdev = pdev;
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platform_set_drvdata(pdev, psw);
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return 0;
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err_irq:
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free_irq(irq, pdev);
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err:
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kfree(psw);
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return ret;
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}
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static int switch_drv_remove(struct platform_device *pdev)
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{
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struct push_switch *psw = platform_get_drvdata(pdev);
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struct push_switch_platform_info *psw_info = pdev->dev.platform_data;
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int irq = platform_get_irq(pdev, 0);
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if (psw_info->name)
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device_remove_file(&pdev->dev, &dev_attr_switch);
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platform_set_drvdata(pdev, NULL);
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flush_work(&psw->work);
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del_timer_sync(&psw->debounce);
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free_irq(irq, pdev);
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kfree(psw);
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return 0;
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}
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static struct platform_driver switch_driver = {
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.probe = switch_drv_probe,
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.remove = switch_drv_remove,
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.driver = {
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.name = DRV_NAME,
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},
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};
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static int __init switch_init(void)
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{
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printk(KERN_NOTICE DRV_NAME ": version %s loaded\n", DRV_VERSION);
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return platform_driver_register(&switch_driver);
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}
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static void __exit switch_exit(void)
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{
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platform_driver_unregister(&switch_driver);
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}
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module_init(switch_init);
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module_exit(switch_exit);
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MODULE_VERSION(DRV_VERSION);
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MODULE_AUTHOR("Paul Mundt");
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MODULE_LICENSE("GPL v2");
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