| Message ID | 1430441515-30122-3-git-send-email-killertofu@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Jiri Kosina |
| Headers | show |
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c index 157aa7a..7abf52c 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; }
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 <jason.gerecke@wacom.com> --- drivers/hid/wacom_sys.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)