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Input: LEDs - skip unnamed LEDs

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Devices may declare more LEDs than what is known to input-leds
(HID does this for some devices). Instead of showing ugly warnings
on connect and, even worse, oopsing on disconnect, let's simply
ignore LEDs that are not known to us.

Reported-and-tested-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2015-07-22 14:56:39 -07:00
parent 968491709e
commit b38ebd1d4b
1 changed files with 14 additions and 2 deletions
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16
drivers/input/input-leds.c
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@ -71,6 +71,18 @@ static void input_leds_event(struct input_handle *handle, unsigned int type,
{
}
static int input_leds_get_count(struct input_dev *dev)
{
unsigned int led_code;
int count = 0;
for_each_set_bit(led_code, dev->ledbit, LED_CNT)
if (input_led_info[led_code].name)
count++;
return count;
}
static int input_leds_connect(struct input_handler *handler,
struct input_dev *dev,
const struct input_device_id *id)
@ -81,7 +93,7 @@ static int input_leds_connect(struct input_handler *handler,
int led_no;
int error;
num_leds = bitmap_weight(dev->ledbit, LED_CNT);
num_leds = input_leds_get_count(dev);
if (!num_leds)
return -ENXIO;
@ -112,7 +124,7 @@ static int input_leds_connect(struct input_handler *handler,
led->handle = &leds->handle;
led->code = led_code;
if (WARN_ON(!input_led_info[led_code].name))
if (!input_led_info[led_code].name)
continue;
led->cdev.name = kasprintf(GFP_KERNEL, "%s::%s",