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/input.c | 88 ++++++++++++++++++++++++++++++--------------------- 1 file changed, 52 insertions(+), 36 deletions(-) (limited to 'drivers/input/input.c') diff --git a/drivers/input/input.c b/drivers/input/input.c index 5629e397520..86b27079004 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -380,12 +380,6 @@ static int input_default_setkeycode(struct input_dev *dev, } -static void input_link_handle(struct input_handle *handle) -{ - list_add_tail(&handle->d_node, &handle->dev->h_list); - list_add_tail(&handle->h_node, &handle->handler->h_list); -} - #define MATCH_BIT(bit, max) \ for (i = 0; i < NBITS(max); i++) \ if ((id->bit[i] & dev->bit[i]) != id->bit[i]) \ @@ -432,6 +426,29 @@ static const struct input_device_id *input_match_device(const struct input_devic return NULL; } +static int input_attach_handler(struct input_dev *dev, struct input_handler *handler) +{ + const struct input_device_id *id; + int error; + + if (handler->blacklist && input_match_device(handler->blacklist, dev)) + return -ENODEV; + + id = input_match_device(handler->id_table, dev); + if (!id) + return -ENODEV; + + error = handler->connect(handler, dev, id); + if (error && error != -ENODEV) + printk(KERN_ERR + "input: failed to attach handler %s to device %s, " + "error: %d\n", + handler->name, kobject_name(&dev->cdev.kobj), error); + + return error; +} + + #ifdef CONFIG_PROC_FS static struct proc_dir_entry *proc_bus_input_dir; @@ -1032,9 +1049,7 @@ EXPORT_SYMBOL(input_free_device); int input_register_device(struct input_dev *dev) { static atomic_t input_no = ATOMIC_INIT(0); - struct input_handle *handle; struct input_handler *handler; - const struct input_device_id *id; const char *path; int error; @@ -1074,13 +1089,7 @@ int input_register_device(struct input_dev *dev) kfree(path); list_for_each_entry(handler, &input_handler_list, node) - if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) - if ((id = input_match_device(handler->id_table, dev))) - if ((handle = handler->connect(handler, dev, id))) { - input_link_handle(handle); - if (handler->start) - handler->start(handle); - } + input_attach_handler(dev, handler); input_wakeup_procfs_readers(); @@ -1090,7 +1099,7 @@ EXPORT_SYMBOL(input_register_device); void input_unregister_device(struct input_dev *dev) { - struct list_head *node, *next; + struct input_handle *handle, *next; int code; for (code = 0; code <= KEY_MAX; code++) @@ -1100,12 +1109,9 @@ void input_unregister_device(struct input_dev *dev) del_timer_sync(&dev->timer); - list_for_each_safe(node, next, &dev->h_list) { - struct input_handle * handle = to_handle(node); - list_del_init(&handle->d_node); - list_del_init(&handle->h_node); + list_for_each_entry_safe(handle, next, &dev->h_list, d_node) handle->handler->disconnect(handle); - } + WARN_ON(!list_empty(&dev->h_list)); list_del_init(&dev->node); @@ -1118,8 +1124,6 @@ EXPORT_SYMBOL(input_unregister_device); int input_register_handler(struct input_handler *handler) { struct input_dev *dev; - struct input_handle *handle; - const struct input_device_id *id; INIT_LIST_HEAD(&handler->h_list); @@ -1133,13 +1137,7 @@ int input_register_handler(struct input_handler *handler) list_add_tail(&handler->node, &input_handler_list); list_for_each_entry(dev, &input_dev_list, node) - if (!handler->blacklist || !input_match_device(handler->blacklist, dev)) - if ((id = input_match_device(handler->id_table, dev))) - if ((handle = handler->connect(handler, dev, id))) { - input_link_handle(handle); - if (handler->start) - handler->start(handle); - } + input_attach_handler(dev, handler); input_wakeup_procfs_readers(); return 0; @@ -1148,14 +1146,11 @@ EXPORT_SYMBOL(input_register_handler); void input_unregister_handler(struct input_handler *handler) { - struct list_head *node, *next; + struct input_handle *handle, *next; - list_for_each_safe(node, next, &handler->h_list) { - struct input_handle * handle = to_handle_h(node); - list_del_init(&handle->h_node); - list_del_init(&handle->d_node); + list_for_each_entry_safe(handle, next, &handler->h_list, h_node) handler->disconnect(handle); - } + WARN_ON(!list_empty(&handler->h_list)); list_del_init(&handler->node); @@ -1166,6 +1161,27 @@ void input_unregister_handler(struct input_handler *handler) } EXPORT_SYMBOL(input_unregister_handler); +int input_register_handle(struct input_handle *handle) +{ + struct input_handler *handler = handle->handler; + + list_add_tail(&handle->d_node, &handle->dev->h_list); + list_add_tail(&handle->h_node, &handler->h_list); + + if (handler->start) + handler->start(handle); + + return 0; +} +EXPORT_SYMBOL(input_register_handle); + +void input_unregister_handle(struct input_handle *handle) +{ + list_del_init(&handle->h_node); + list_del_init(&handle->d_node); +} +EXPORT_SYMBOL(input_unregister_handle); + static int input_open_file(struct inode *inode, struct file *file) { struct input_handler *handler = input_table[iminor(inode) >> 5]; 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