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Input: initialize input_no to -1 to avoid subtraction

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Let's initializes input_no to -1 in order to avoid extra subtraction
operation performed every time we allocate an input device.

Signed-off-by: Aniroop Mathur <aniroop.mathur@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Aniroop Mathur 2014-12-02 15:22:28 -08:00 committed by Dmitry Torokhov
parent 8195077c4a
commit 9c7d66fa9b
1 changed files with 2 additions and 2 deletions
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4
drivers/input/input.c
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@ -1775,7 +1775,7 @@ EXPORT_SYMBOL_GPL(input_class);
*/
struct input_dev *input_allocate_device(void)
{
static atomic_t input_no = ATOMIC_INIT(0);
static atomic_t input_no = ATOMIC_INIT(-1);
struct input_dev *dev;
dev = kzalloc(sizeof(struct input_dev), GFP_KERNEL);
@ -1790,7 +1790,7 @@ struct input_dev *input_allocate_device(void)
INIT_LIST_HEAD(&dev->node);
dev_set_name(&dev->dev, "input%lu",
(unsigned long) atomic_inc_return(&input_no) - 1);
(unsigned long)atomic_inc_return(&input_no));
__module_get(THIS_MODULE);
}