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path: root/drivers/hid/hid-ntrig.c
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Diffstat (limited to 'drivers/hid/hid-ntrig.c')
-rw-r--r--drivers/hid/hid-ntrig.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index beb403421e72..a93e58ca81ed 100644
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -539,8 +539,19 @@ static int ntrig_input_mapped(struct hid_device *hdev, struct hid_input *hi,
static int ntrig_event (struct hid_device *hid, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
- struct input_dev *input = field->hidinput->input;
struct ntrig_data *nd = hid_get_drvdata(hid);
+ struct input_dev *input;
+
+ /* Skip processing if not a claimed input */
+ if (!(hid->claimed & HID_CLAIMED_INPUT))
+ goto not_claimed_input;
+
+ /* This function is being called before the structures are fully
+ * initialized */
+ if(!(field->hidinput && field->hidinput->input))
+ return -EINVAL;
+
+ input = field->hidinput->input;
/* No special handling needed for the pen */
if (field->application == HID_DG_PEN)
@@ -810,6 +821,8 @@ static int ntrig_event (struct hid_device *hid, struct hid_field *field,
}
}
+not_claimed_input:
+
/* we have handled the hidinput part, now remains hiddev */
if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_hid_event)
hid->hiddev_hid_event(hid, field, usage, value);