[2/4] HID: wacom: generic: Send data only when the interface is defined
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Message ID 1481156290-5309-1-git-send-email-pingc@wacom.com
State New
Headers show

Commit Message

Ping Cheng Dec. 8, 2016, 12:18 a.m. UTC
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(-)

Patch
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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);
 }