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Input: add match() method to input hanlders

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Get rid of blacklist in input handler structure and instead allow
handlers to define their own match() method to perform fine-grained
filtering of supported devices.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov
2010-02-02 21:08:26 -08:00
parent 1e87a43080
commit 0b7024ac4d
4 changed files with 40 additions and 35 deletions
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13
drivers/input/input.c
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@ -723,12 +723,13 @@ EXPORT_SYMBOL(input_set_keycode);
if (i != BITS_TO_LONGS(max)) \
continue;
static const struct input_device_id *input_match_device(const struct input_device_id *id,
static const struct input_device_id *input_match_device(struct input_handler *handler,
struct input_dev *dev)
{
const struct input_device_id *id;
int i;
for (; id->flags || id->driver_info; id++) {
for (id = handler->id_table; id->flags || id->driver_info; id++) {
if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
if (id->bustype != dev->id.bustype)
@ -756,7 +757,8 @@ static const struct input_device_id *input_match_device(const struct input_devic
MATCH_BIT(ffbit, FF_MAX);
MATCH_BIT(swbit, SW_MAX);
return id;
if (!handler->match || handler->match(handler, dev))
return id;
}
return NULL;
@ -767,10 +769,7 @@ static int input_attach_handler(struct input_dev *dev, struct input_handler *han
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);
id = input_match_device(handler, dev);
if (!id)
return -ENODEV;