From d8e4ebf8b603bdcd091540e6b5bddf0dec10d516 Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Tue, 23 Mar 2010 16:32:37 +0100 Subject: HID: fix oops in gyration_event() Fix oops caused by dereferencing field->hidinput in cases where the device hasn't been claimed by hid-input. Reported-by: Andreas Demmer Signed-off-by: Jiri Kosina --- drivers/hid/hid-gyration.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/hid/hid-gyration.c') diff --git a/drivers/hid/hid-gyration.c b/drivers/hid/hid-gyration.c index cab13e8c7d2..62416e6baec 100644 --- a/drivers/hid/hid-gyration.c +++ b/drivers/hid/hid-gyration.c @@ -53,10 +53,13 @@ static int gyration_input_mapping(struct hid_device *hdev, struct hid_input *hi, static int gyration_event(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, __s32 value) { - struct input_dev *input = field->hidinput->input; + + if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput) + return 0; if ((usage->hid & HID_USAGE_PAGE) == HID_UP_GENDESK && (usage->hid & 0xff) == 0x82) { + struct input_dev *input = field->hidinput->input; input_event(input, usage->type, usage->code, 1); input_sync(input); input_event(input, usage->type, usage->code, 0); -- cgit v1.2.3-70-g09d2