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HID: wacom: generic: Send data only when the interface is defined 

Sometime valid events may not be supported by the driver yet. Make
sure we don't process them when the code is not ready.

This fix prevents a kernel panic due to unsupported HID events.

Signed-off-by: Ping Cheng <ping.cheng@wacom.com>
Reviewed-By: Jason Gerecke <jason.gerecke@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Ping Cheng 2016-12-08 22:04:52 -08:00 коммит произвёл Jiri Kosina
Родитель 354a32985a
Коммит 6f46cf9b40
1 изменённых файлов: 9 добавлений и 9 удалений
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18
drivers/hid/wacom_wac.c
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@ -2109,11 +2109,11 @@ void wacom_wac_event(struct hid_device *hdev, struct hid_field *field,
if (wacom->wacom_wac.features.type != HID_GENERIC)
return;
if (WACOM_PAD_FIELD(field))
if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)
wacom_wac_pad_event(hdev, field, usage, value);
else if (WACOM_PEN_FIELD(field))
else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)
wacom_wac_pen_event(hdev, field, usage, value);
else if (WACOM_FINGER_FIELD(field))
else if (WACOM_FINGER_FIELD(field) && wacom->wacom_wac.touch_input)
wacom_wac_finger_event(hdev, field, usage, value);
}
@ -2145,20 +2145,20 @@ void wacom_wac_report(struct hid_device *hdev, struct hid_report *report)
if (wacom_wac->features.type != HID_GENERIC)
return;
if (WACOM_PAD_FIELD(field))
if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)
wacom_wac_pad_pre_report(hdev, report);
else if (WACOM_PEN_FIELD(field))
else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)
wacom_wac_pen_pre_report(hdev, report);
else if (WACOM_FINGER_FIELD(field))
else if (WACOM_FINGER_FIELD(field) && wacom->wacom_wac.touch_input)
wacom_wac_finger_pre_report(hdev, report);
wacom_report_events(hdev, report);
if (WACOM_PAD_FIELD(field))
if (WACOM_PAD_FIELD(field) && wacom->wacom_wac.pad_input)
return wacom_wac_pad_report(hdev, report);
else if (WACOM_PEN_FIELD(field))
else if (WACOM_PEN_FIELD(field) && wacom->wacom_wac.pen_input)
return wacom_wac_pen_report(hdev, report);
else if (WACOM_FINGER_FIELD(field))
else if (WACOM_FINGER_FIELD(field) && wacom->wacom_wac.touch_input)
return wacom_wac_finger_report(hdev, report);
}