forked from luck/tmp_suning_uos_patched
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 <mail@andreas-demmer.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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@ -53,10 +53,13 @@ static int gyration_input_mapping(struct hid_device *hdev, struct hid_input *hi,
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static int gyration_event(struct hid_device *hdev, struct hid_field *field,
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struct hid_usage *usage, __s32 value)
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{
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struct input_dev *input = field->hidinput->input;
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if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput)
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return 0;
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if ((usage->hid & HID_USAGE_PAGE) == HID_UP_GENDESK &&
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(usage->hid & 0xff) == 0x82) {
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struct input_dev *input = field->hidinput->input;
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input_event(input, usage->type, usage->code, 1);
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input_sync(input);
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input_event(input, usage->type, usage->code, 0);
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