[PATCH 1/3] Input: factor out and export input_device_id matching code

[Dmitry Torokhov]

Factor out and export input_match_device_id() so that modules may use it.
It will be needed by joydev to blacklist accelerometers in composite
devices.

Signed-off-by: Dmitry Torokhov <dmitry.torok...@gmail.com>
---
 drivers/input/input.c | 83 +++++++++++++++++++++++----------------------------
 include/linux/input.h |  3 ++
 2 files changed, 41 insertions(+), 45 deletions(-)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index f157ad5784a1..a8d4f1653588 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -938,58 +938,51 @@ int input_set_keycode(struct input_dev *dev,
 }
 EXPORT_SYMBOL(input_set_keycode);
 
+bool input_match_device_id(const struct input_dev *dev,
+                          const struct input_device_id *id)
+{
+       if (id->flags & INPUT_DEVICE_ID_MATCH_BUS)
+               if (id->bustype != dev->id.bustype)
+                       return false;
+
+       if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
+               if (id->vendor != dev->id.vendor)
+                       return false;
+
+       if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
+               if (id->product != dev->id.product)
+                       return false;
+
+       if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
+               if (id->version != dev->id.version)
+                       return false;
+
+       if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX) ||
+           !bitmap_subset(id->keybit, dev->keybit, KEY_MAX) ||
+           !bitmap_subset(id->relbit, dev->relbit, REL_MAX) ||
+           !bitmap_subset(id->absbit, dev->absbit, ABS_MAX) ||
+           !bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX) ||
+           !bitmap_subset(id->ledbit, dev->ledbit, LED_MAX) ||
+           !bitmap_subset(id->sndbit, dev->sndbit, SND_MAX) ||
+           !bitmap_subset(id->ffbit, dev->ffbit, FF_MAX) ||
+           !bitmap_subset(id->swbit, dev->swbit, SW_MAX)) {
+               return false;
+       }
+
+       return true;
+}
+EXPORT_SYMBOL(input_match_device_id);
+
 static const struct input_device_id *input_match_device(struct input_handler 
*handler,
                                                        struct input_dev *dev)
 {
        const struct input_device_id *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)
-                               continue;
-
-               if (id->flags & INPUT_DEVICE_ID_MATCH_VENDOR)
-                       if (id->vendor != dev->id.vendor)
-                               continue;
-
-               if (id->flags & INPUT_DEVICE_ID_MATCH_PRODUCT)
-                       if (id->product != dev->id.product)
-                               continue;
-
-               if (id->flags & INPUT_DEVICE_ID_MATCH_VERSION)
-                       if (id->version != dev->id.version)
-                               continue;
-
-               if (!bitmap_subset(id->evbit, dev->evbit, EV_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->keybit, dev->keybit, KEY_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->relbit, dev->relbit, REL_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->absbit, dev->absbit, ABS_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->mscbit, dev->mscbit, MSC_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->ledbit, dev->ledbit, LED_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->sndbit, dev->sndbit, SND_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->ffbit, dev->ffbit, FF_MAX))
-                       continue;
-
-               if (!bitmap_subset(id->swbit, dev->swbit, SW_MAX))
-                       continue;
-
-               if (!handler->match || handler->match(handler, dev))
+               if (input_match_device_id(dev, id) &&
+                   (!handler->match || handler->match(handler, dev))) {
                        return id;
+               }
        }
 
        return NULL;
diff --git a/include/linux/input.h b/include/linux/input.h
index 9b03f34807a7..066093fb8b3c 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -477,6 +477,9 @@ int input_get_keycode(struct input_dev *dev, struct 
input_keymap_entry *ke);
 int input_set_keycode(struct input_dev *dev,
                      const struct input_keymap_entry *ke);
 
+bool input_match_device_id(const struct input_dev *dev,
+                          const struct input_device_id *id);
+
 void input_enable_softrepeat(struct input_dev *dev, int delay, int period);
 
 extern struct class input_class;
-- 
2.14.2.920.gcf0c67979c-goog