From 5b2a08262a8c952fef008154933953f083ca5766 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Thu, 12 Apr 2007 01:29:46 -0400 Subject: Input: rework handle creation code - consolidate code for binding handlers to a device - return error codes from handlers connect() methods back to input core and log failures Signed-off-by: Dmitry Torokhov --- drivers/input/evdev.c | 47 ++++++++++++++++++++++++++++++++++++----------- 1 file changed, 36 insertions(+), 11 deletions(-) (limited to 'drivers/input/evdev.c') diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 64b47de052bb..840fa1986527 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -605,21 +605,24 @@ static const struct file_operations evdev_fops = { .flush = evdev_flush }; -static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, - const struct input_device_id *id) +static int evdev_connect(struct input_handler *handler, struct input_dev *dev, + const struct input_device_id *id) { struct evdev *evdev; struct class_device *cdev; + dev_t devt; int minor; + int error; for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++); if (minor == EVDEV_MINORS) { printk(KERN_ERR "evdev: no more free evdev devices\n"); - return NULL; + return -ENFILE; } - if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL))) - return NULL; + evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL); + if (!evdev) + return -ENOMEM; INIT_LIST_HEAD(&evdev->list); init_waitqueue_head(&evdev->wait); @@ -634,15 +637,35 @@ static struct input_handle *evdev_connect(struct input_handler *handler, struct evdev_table[minor] = evdev; - cdev = class_device_create(&input_class, &dev->cdev, - MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor), - dev->cdev.dev, evdev->name); + devt = MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor), + + cdev = class_device_create(&input_class, &dev->cdev, devt, + dev->cdev.dev, evdev->name); + if (IS_ERR(cdev)) { + error = PTR_ERR(cdev); + goto err_free_evdev; + } /* temporary symlink to keep userspace happy */ - sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj, - evdev->name); + error = sysfs_create_link(&input_class.subsys.kset.kobj, + &cdev->kobj, evdev->name); + if (error) + goto err_cdev_destroy; + + error = input_register_handle(&evdev->handle); + if (error) + goto err_remove_link; - return &evdev->handle; + return 0; + + err_remove_link: + sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name); + err_cdev_destroy: + class_device_destroy(&input_class, devt); + err_free_evdev: + kfree(evdev); + evdev_table[minor] = NULL; + return error; } static void evdev_disconnect(struct input_handle *handle) @@ -650,6 +673,8 @@ static void evdev_disconnect(struct input_handle *handle) struct evdev *evdev = handle->private; struct evdev_list *list; + input_unregister_handle(handle); + sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name); class_device_destroy(&input_class, MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor)); -- cgit v1.2.3