[PATCH 2/4] HID: wacom: generic: Send data only when the interface is defined
From: Ping Cheng <hidden>
Date: 2016-12-08 00:18:25
Subsystem:
hid core layer, hid wacom driver, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Ping Cheng, Jason Gerecke, Linus Torvalds
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> --- drivers/hid/wacom_wac.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index f1c49a4..29d2610 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c@@ -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); }
--
2.7.4