Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5b2a08262a8c952fef008154933953f083ca5766
Commit: 5b2a08262a8c952fef008154933953f083ca5766
Parent: 6e782584e0713ea89da151333e7fe754c8f40324
Author: Dmitry Torokhov <[EMAIL PROTECTED]>
AuthorDate: Thu Apr 12 01:29:46 2007 -0400
Committer: Dmitry Torokhov <[EMAIL PROTECTED]>
CommitDate: Thu Apr 12 01:29:46 2007 -0400
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 <[EMAIL PROTECTED]>
---
drivers/char/keyboard.c | 28 ++++++++++----
drivers/input/evbug.c | 32 +++++++++++-----
drivers/input/evdev.c | 47 +++++++++++++++++++------
drivers/input/input.c | 88 +++++++++++++++++++++++++++-------------------
drivers/input/joydev.c | 48 +++++++++++++++++++------
drivers/input/mousedev.c | 61 ++++++++++++++++++++++++--------
drivers/input/power.c | 46 ++++++++++++++++--------
drivers/input/tsdev.c | 58 +++++++++++++++++++++---------
include/linux/input.h | 5 ++-
9 files changed, 288 insertions(+), 125 deletions(-)
diff --git a/drivers/char/keyboard.c b/drivers/char/keyboard.c
index 3d211e8..5971254 100644
--- a/drivers/char/keyboard.c
+++ b/drivers/char/keyboard.c
@@ -41,7 +41,6 @@
#include <linux/input.h>
#include <linux/reboot.h>
-static void kbd_disconnect(struct input_handle *handle);
extern void ctrl_alt_del(void);
/*
@@ -1260,11 +1259,11 @@ static void kbd_event(struct input_handle *handle,
unsigned int event_type,
* likes it, it can open it and get events from it. In this (kbd_connect)
* function, we should decide which VT to bind that keyboard to initially.
*/
-static struct input_handle *kbd_connect(struct input_handler *handler,
- struct input_dev *dev,
- const struct input_device_id *id)
+static int kbd_connect(struct input_handler *handler, struct input_dev *dev,
+ const struct input_device_id *id)
{
struct input_handle *handle;
+ int error;
int i;
for (i = KEY_RESERVED; i < BTN_MISC; i++)
@@ -1272,24 +1271,37 @@ static struct input_handle *kbd_connect(struct
input_handler *handler,
break;
if (i == BTN_MISC && !test_bit(EV_SND, dev->evbit))
- return NULL;
+ return -ENODEV;
handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
if (!handle)
- return NULL;
+ return -ENOMEM;
handle->dev = dev;
handle->handler = handler;
handle->name = "kbd";
- input_open_device(handle);
+ error = input_register_handle(handle);
+ if (error)
+ goto err_free_handle;
+
+ error = input_open_device(handle);
+ if (error)
+ goto err_unregister_handle;
+
+ return 0;
- return handle;
+ err_unregister_handle:
+ input_unregister_handle(handle);
+ err_free_handle:
+ kfree(handle);
+ return error;
}
static void kbd_disconnect(struct input_handle *handle)
{
input_close_device(handle);
+ input_unregister_handle(handle);
kfree(handle);
}
diff --git a/drivers/input/evbug.c b/drivers/input/evbug.c
index 5a9653c..c21f2f1 100644
--- a/drivers/input/evbug.c
+++ b/drivers/input/evbug.c
@@ -38,31 +38,43 @@ MODULE_AUTHOR("Vojtech Pavlik <[EMAIL PROTECTED]>");
MODULE_DESCRIPTION("Input driver event debug module");
MODULE_LICENSE("GPL");
-static char evbug_name[] = "evbug";
-
static void evbug_event(struct input_handle *handle, unsigned int type,
unsigned int code, int value)
{
printk(KERN_DEBUG "evbug.c: Event. Dev: %s, Type: %d, Code: %d, Value:
%d\n",
handle->dev->phys, type, code, value);
}
-static struct input_handle *evbug_connect(struct input_handler *handler,
struct input_dev *dev,
- const struct input_device_id *id)
+static int evbug_connect(struct input_handler *handler, struct input_dev *dev,
+ const struct input_device_id *id)
{
struct input_handle *handle;
+ int error;
- if (!(handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL)))
- return NULL;
+ handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
+ if (!handle)
+ return -ENOMEM;
handle->dev = dev;
handle->handler = handler;
- handle->name = evbug_name;
+ handle->name = "evbug";
+
+ error = input_register_handle(handle);
+ if (error)
+ goto err_free_handle;
- input_open_device(handle);
+ error = input_open_device(handle);
+ if (error)
+ goto err_unregister_handle;
printk(KERN_DEBUG "evbug.c: Connected device: \"%s\", %s\n", dev->name,
dev->phys);
- return handle;
+ return 0;
+
+ err_unregister_handle:
+ input_unregister_handle(handle);
+ err_free_handle:
+ kfree(handle);
+ return error;
}
static void evbug_disconnect(struct input_handle *handle)
@@ -70,7 +82,7 @@ static void evbug_disconnect(struct input_handle *handle)
printk(KERN_DEBUG "evbug.c: Disconnected device: %s\n",
handle->dev->phys);
input_close_device(handle);
-
+ input_unregister_handle(handle);
kfree(handle);
}
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 64b47de..840fa19 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));
diff --git a/drivers/input/input.c b/drivers/input/input.c
index 5629e39..86b2707 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];
diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index 9f3529a..cf24a5b 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -465,21 +465,24 @@ static const struct file_operations joydev_fops = {
.fasync = joydev_fasync,
};
-static struct input_handle *joydev_connect(struct input_handler *handler,
struct input_dev *dev,
- const struct input_device_id *id)
+static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
+ const struct input_device_id *id)
{
struct joydev *joydev;
struct class_device *cdev;
+ dev_t devt;
int i, j, t, minor;
+ int error;
for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
if (minor == JOYDEV_MINORS) {
printk(KERN_ERR "joydev: no more free joydev devices\n");
- return NULL;
+ return -ENFILE;
}
- if (!(joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL)))
- return NULL;
+ joydev = kzalloc(sizeof(struct joydev), GFP_KERNEL);
+ if (!joydev)
+ return -ENOMEM;
INIT_LIST_HEAD(&joydev->list);
init_waitqueue_head(&joydev->wait);
@@ -534,22 +537,45 @@ static struct input_handle *joydev_connect(struct
input_handler *handler, struct
joydev_table[minor] = joydev;
- cdev = class_device_create(&input_class, &dev->cdev,
- MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
- dev->cdev.dev, joydev->name);
+ devt = MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
+
+ cdev = class_device_create(&input_class, &dev->cdev, devt,
+ dev->cdev.dev, joydev->name);
+ if (IS_ERR(cdev)) {
+ error = PTR_ERR(cdev);
+ goto err_free_joydev;
+ }
/* temporary symlink to keep userspace happy */
- sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
- joydev->name);
+ error = sysfs_create_link(&input_class.subsys.kset.kobj,
+ &cdev->kobj, joydev->name);
+ if (error)
+ goto err_cdev_destroy;
+
+ error = input_register_handle(&joydev->handle);
+ if (error)
+ goto err_remove_link;
+
+ return 0;
- return &joydev->handle;
+ err_remove_link:
+ sysfs_remove_link(&input_class.subsys.kset.kobj, joydev->name);
+ err_cdev_destroy:
+ class_device_destroy(&input_class, devt);
+ err_free_joydev:
+ joydev_table[minor] = NULL;
+ kfree(joydev);
+ return error;
}
+
static void joydev_disconnect(struct input_handle *handle)
{
struct joydev *joydev = handle->private;
struct joydev_list *list;
+ input_unregister_handle(handle);
+
sysfs_remove_link(&input_class.subsys.kset.kobj, joydev->name);
class_device_destroy(&input_class, MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE
+ joydev->minor));
joydev->exist = 0;
diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index 664bcc8..007e72f 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -624,23 +624,27 @@ static const struct file_operations mousedev_fops = {
.fasync = mousedev_fasync,
};
-static struct input_handle *mousedev_connect(struct input_handler *handler,
struct input_dev *dev,
- const struct input_device_id *id)
+static int mousedev_connect(struct input_handler *handler, struct input_dev
*dev,
+ const struct input_device_id *id)
{
struct mousedev *mousedev;
struct class_device *cdev;
- int minor = 0;
+ dev_t devt;
+ int minor;
+ int error;
for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor];
minor++);
if (minor == MOUSEDEV_MINORS) {
printk(KERN_ERR "mousedev: no more free mousedev devices\n");
- return NULL;
+ return -ENFILE;
}
- if (!(mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL)))
- return NULL;
+ mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL);
+ if (!mousedev)
+ return -ENOMEM;
INIT_LIST_HEAD(&mousedev->list);
+ INIT_LIST_HEAD(&mousedev->mixdev_node);
init_waitqueue_head(&mousedev->wait);
mousedev->minor = minor;
@@ -651,20 +655,45 @@ static struct input_handle *mousedev_connect(struct
input_handler *handler, stru
mousedev->handle.private = mousedev;
sprintf(mousedev->name, "mouse%d", minor);
- if (mousedev_mix.open)
- input_open_device(&mousedev->handle);
-
mousedev_table[minor] = mousedev;
- cdev = class_device_create(&input_class, &dev->cdev,
- MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
- dev->cdev.dev, mousedev->name);
+ devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
+
+ cdev = class_device_create(&input_class, &dev->cdev, devt,
+ dev->cdev.dev, mousedev->name);
+ if (IS_ERR(cdev)) {
+ error = PTR_ERR(cdev);
+ goto err_free_mousedev;
+ }
/* temporary symlink to keep userspace happy */
- sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
- mousedev->name);
+ error = sysfs_create_link(&input_class.subsys.kset.kobj,
+ &cdev->kobj, mousedev->name);
+ if (error)
+ goto err_cdev_destroy;
- return &mousedev->handle;
+ error = input_register_handle(&mousedev->handle);
+ if (error)
+ goto err_remove_link;
+
+ if (mousedev_mix.open) {
+ error = input_open_device(&mousedev->handle);
+ if (error)
+ goto err_unregister_handle;
+ }
+
+ return 0;
+
+ err_unregister_handle:
+ input_unregister_handle(&mousedev->handle);
+ err_remove_link:
+ sysfs_remove_link(&input_class.subsys.kset.kobj, mousedev->name);
+ err_cdev_destroy:
+ class_device_destroy(&input_class, devt);
+ err_free_mousedev:
+ mousedev_table[minor] = NULL;
+ kfree(mousedev);
+ return error;
}
static void mousedev_disconnect(struct input_handle *handle)
@@ -672,6 +701,8 @@ static void mousedev_disconnect(struct input_handle *handle)
struct mousedev *mousedev = handle->private;
struct mousedev_list *list;
+ input_unregister_handle(handle);
+
sysfs_remove_link(&input_class.subsys.kset.kobj, mousedev->name);
class_device_destroy(&input_class,
MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE +
mousedev->minor));
diff --git a/drivers/input/power.c b/drivers/input/power.c
index ee82464..e28d264 100644
--- a/drivers/input/power.c
+++ b/drivers/input/power.c
@@ -41,14 +41,14 @@ static struct input_handler power_handler;
* Power management can't be done in a interrupt context. So we have to
* use keventd.
*/
-static int suspend_button_pushed = 0;
-static void suspend_button_task_handler(void *data)
+static int suspend_button_pushed;
+static void suspend_button_task_handler(struct work_struct *work)
{
udelay(200); /* debounce */
suspend_button_pushed = 0;
}
-static DECLARE_WORK(suspend_button_task, suspend_button_task_handler, NULL);
+static DECLARE_WORK(suspend_button_task, suspend_button_task_handler);
static void power_event(struct input_handle *handle, unsigned int type,
unsigned int code, int down)
@@ -63,9 +63,9 @@ static void power_event(struct input_handle *handle, unsigned
int type,
printk("Powering down entire device\n");
if (!suspend_button_pushed) {
- suspend_button_pushed = 1;
- schedule_work(&suspend_button_task);
- }
+ suspend_button_pushed = 1;
+ schedule_work(&suspend_button_task);
+ }
break;
case KEY_POWER:
/* Hum power down the machine. */
@@ -84,7 +84,7 @@ static void power_event(struct input_handle *handle, unsigned
int type,
dev->state = PM_RESUME;
else
dev->state = PM_SUSPEND;
- pm_send(dev->pm_dev, dev->state, dev);
+ /* pm_send(dev->pm_dev, dev->state, dev); */
break;
case KEY_POWER:
/* Turn the input device off completely ? */
@@ -96,27 +96,41 @@ static void power_event(struct input_handle *handle,
unsigned int type,
return;
}
-static struct input_handle *power_connect(struct input_handler *handler,
- struct input_dev *dev,
- const struct input_device_id *id)
+static int power_connect(struct input_handler *handler, struct input_dev *dev,
+ const struct input_device_id *id)
{
struct input_handle *handle;
+ int error;
- if (!(handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL)))
- return NULL;
+ handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
+ if (!handle)
+ return -ENOMEM;
handle->dev = dev;
handle->handler = handler;
+ handle->name = "power";
- input_open_device(handle);
+ error = input_register_handle(handle);
+ if (error)
+ goto err_free_handle;
- printk(KERN_INFO "power.c: Adding power management to input layer\n");
- return handle;
+ error = input_open_device(handle);
+ if (error)
+ goto err_unregister_handle;
+
+ return 0;
+
+ err_unregister_handle:
+ input_unregister_handle(handle);
+ err_free_handle:
+ kfree(handle);
+ return error;
}
static void power_disconnect(struct input_handle *handle)
{
input_close_device(handle);
+ input_unregister_handle(handle);
kfree(handle);
}
@@ -135,7 +149,7 @@ static const struct input_device_id power_ids[] = {
.flags = INPUT_DEVICE_ID_MATCH_EVBIT,
.evbit = { BIT(EV_PWR) },
},
- { }, /* Terminating entry */
+ { }, /* Terminating entry */
};
MODULE_DEVICE_TABLE(input, power_ids);
diff --git a/drivers/input/tsdev.c b/drivers/input/tsdev.c
index 0300dca..a23aedc 100644
--- a/drivers/input/tsdev.c
+++ b/drivers/input/tsdev.c
@@ -155,7 +155,7 @@ static int tsdev_open(struct inode *inode, struct file
*file)
"for removal.\nSee Documentation/feature-removal-schedule.txt "
"for details.\n");
- if (i >= TSDEV_MINORS || !tsdev_table[i & TSDEV_MINOR_MASK])
+ if (i >= TSDEV_MINORS)
return -ENODEV;
if (!(list = kzalloc(sizeof(struct tsdev_list), GFP_KERNEL)))
@@ -246,14 +246,14 @@ static int tsdev_ioctl(struct inode *inode, struct file
*file,
switch (cmd) {
case TS_GET_CAL:
- if (copy_to_user ((void __user *)arg, &tsdev->cal,
- sizeof (struct ts_calibration)))
+ if (copy_to_user((void __user *)arg, &tsdev->cal,
+ sizeof (struct ts_calibration)))
retval = -EFAULT;
break;
case TS_SET_CAL:
- if (copy_from_user (&tsdev->cal, (void __user *)arg,
- sizeof (struct ts_calibration)))
+ if (copy_from_user(&tsdev->cal, (void __user *)arg,
+ sizeof (struct ts_calibration)))
retval = -EFAULT;
break;
@@ -370,23 +370,25 @@ static void tsdev_event(struct input_handle *handle,
unsigned int type,
wake_up_interruptible(&tsdev->wait);
}
-static struct input_handle *tsdev_connect(struct input_handler *handler,
- struct input_dev *dev,
- const struct input_device_id *id)
+static int tsdev_connect(struct input_handler *handler, struct input_dev *dev,
+ const struct input_device_id *id)
{
struct tsdev *tsdev;
struct class_device *cdev;
+ dev_t devt;
int minor, delta;
+ int error;
for (minor = 0; minor < TSDEV_MINORS / 2 && tsdev_table[minor];
minor++);
if (minor >= TSDEV_MINORS / 2) {
printk(KERN_ERR
"tsdev: You have way too many touchscreens\n");
- return NULL;
+ return -ENFILE;
}
- if (!(tsdev = kzalloc(sizeof(struct tsdev), GFP_KERNEL)))
- return NULL;
+ tsdev = kzalloc(sizeof(struct tsdev), GFP_KERNEL);
+ if (!tsdev)
+ return -ENOMEM;
INIT_LIST_HEAD(&tsdev->list);
init_waitqueue_head(&tsdev->wait);
@@ -415,15 +417,35 @@ static struct input_handle *tsdev_connect(struct
input_handler *handler,
tsdev_table[minor] = tsdev;
- cdev = class_device_create(&input_class, &dev->cdev,
- MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor),
- dev->cdev.dev, tsdev->name);
+ devt = MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor),
+
+ cdev = class_device_create(&input_class, &dev->cdev, devt,
+ dev->cdev.dev, tsdev->name);
+ if (IS_ERR(cdev)) {
+ error = PTR_ERR(cdev);
+ goto err_free_tsdev;
+ }
/* temporary symlink to keep userspace happy */
- sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
- tsdev->name);
+ error = sysfs_create_link(&input_class.subsys.kset.kobj,
+ &cdev->kobj, tsdev->name);
+ if (error)
+ goto err_cdev_destroy;
- return &tsdev->handle;
+ error = input_register_handle(&tsdev->handle);
+ if (error)
+ goto err_remove_link;
+
+ return 0;
+
+ err_remove_link:
+ sysfs_remove_link(&input_class.subsys.kset.kobj, tsdev->name);
+ err_cdev_destroy:
+ class_device_destroy(&input_class, devt);
+ err_free_tsdev:
+ tsdev_table[minor] = NULL;
+ kfree(tsdev);
+ return error;
}
static void tsdev_disconnect(struct input_handle *handle)
@@ -431,6 +453,8 @@ static void tsdev_disconnect(struct input_handle *handle)
struct tsdev *tsdev = handle->private;
struct tsdev_list *list;
+ input_unregister_handle(handle);
+
sysfs_remove_link(&input_class.subsys.kset.kobj, tsdev->name);
class_device_destroy(&input_class,
MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + tsdev->minor));
diff --git a/include/linux/input.h b/include/linux/input.h
index 3a8b8c6..a51d6cf 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -1049,7 +1049,7 @@ struct input_handler {
void *private;
void (*event)(struct input_handle *handle, unsigned int type, unsigned
int code, int value);
- struct input_handle* (*connect)(struct input_handler *handler, struct
input_dev *dev, const struct input_device_id *id);
+ int (*connect)(struct input_handler *handler, struct input_dev *dev,
const struct input_device_id *id);
void (*disconnect)(struct input_handle *handle);
void (*start)(struct input_handle *handle);
@@ -1102,6 +1102,9 @@ void input_unregister_device(struct input_dev *);
int input_register_handler(struct input_handler *);
void input_unregister_handler(struct input_handler *);
+int input_register_handle(struct input_handle *);
+void input_unregister_handle(struct input_handle *);
+
int input_grab_device(struct input_handle *);
void input_release_device(struct input_handle *);
-
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