From: Jason Gerecke Date: Fri, 1 May 2015 00:51:55 +0000 (-0700) Subject: HID: wacom: Fail probe if HID_GENERIC device has unknown device_type X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8e116d3169cc2b93b7eb2f44dc021a93cd3d5308;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git HID: wacom: Fail probe if HID_GENERIC device has unknown device_type The last patch was careful to maintain backwards-compatible behavior by forcing device_type to BTN_TOOL_PEN (and printing a warning) if it were still uninitialized after scanning the HID descriptor and applying quirks. We should be more strict with HID_GENERIC devices, however, since there is no a priori guarantee that it is a tablet or touchpad. If the device_type is still uninitialized for a HID_GENERIC device then we assume that it isn't something the driver can work with and so fail the probe. Signed-off-by: Jason Gerecke Reviewed-by: Ping Cheng Reviewed-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index 157aa7aa1067..7abf52caa8d8 100644 --- a/drivers/hid/wacom_sys.c +++ b/drivers/hid/wacom_sys.c @@ -1528,8 +1528,14 @@ static int wacom_probe(struct hid_device *hdev, wacom_setup_device_quirks(wacom); if (!features->device_type && features->type != WIRELESS) { + error = features->type == HID_GENERIC ? -ENODEV : 0; + dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.", - hdev->name, "Assuming pen"); + hdev->name, + error ? "Ignoring" : "Assuming pen"); + + if (error) + goto fail_shared_data; features->device_type = BTN_TOOL_PEN; }