Input: add match() method to input hanlders

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>

1 files changed, 15 insertions, 17 deletions

diff --git a/drivers/input/joydev.c b/drivers/input/joydev.c
index b1bd6dd32286..63e71f2a7acc 100644
--- a/drivers/input/joydev.c
+++ b/drivers/input/joydev.c
@@ -775,6 +775,20 @@ static void joydev_cleanup(struct joydev *joydev)
                 input_close_device(handle);
 }
 
+
+static bool joydev_match(struct input_handler *handler, struct input_dev *dev)
+{
+        /* Avoid touchpads and touchscreens */
+        if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_TOUCH, dev->keybit))
+                return false;
+
+        /* Avoid tablets, digitisers and similar devices */
+        if (test_bit(EV_KEY, dev->evbit) && test_bit(BTN_DIGI, dev->keybit))
+                return false;
+
+        return true;
+}
+
 static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
                           const struct input_device_id *id)
 {
@@ -894,22 +908,6 @@ static void joydev_disconnect(struct input_handle *handle)
         put_device(&joydev->dev);
 }
 
-static const struct input_device_id joydev_blacklist[] = {
-        {
-                .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
-                                INPUT_DEVICE_ID_MATCH_KEYBIT,
-                .evbit = { BIT_MASK(EV_KEY) },
-                .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
-        },      /* Avoid itouchpads and touchscreens */
-        {
-                .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
-                                INPUT_DEVICE_ID_MATCH_KEYBIT,
-                .evbit = { BIT_MASK(EV_KEY) },
-                .keybit = { [BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_DIGI) },
-        },      /* Avoid tablets, digitisers and similar devices */
-        { }     /* Terminating entry */
-};
-
 static const struct input_device_id joydev_ids[] = {
         {
                 .flags = INPUT_DEVICE_ID_MATCH_EVBIT |
@@ -936,13 +934,13 @@ MODULE_DEVICE_TABLE(input, joydev_ids);
 
 static struct input_handler joydev_handler = {
         .event          = joydev_event,
+        .match          = joydev_match,
         .connect        = joydev_connect,
         .disconnect     = joydev_disconnect,
         .fops           = &joydev_fops,
         .minor          = JOYDEV_MINOR_BASE,
         .name           = "joydev",
         .id_table       = joydev_ids,
-        .blacklist      = joydev_blacklist,
 };
 
 static int __init joydev_init(void)