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

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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 committed by Jiri Kosina
parent 354a32985a
commit 6f46cf9b40
1 changed files with 9 additions and 9 deletions
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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);
}