On Mon, May 23, 2016 at 5:29 AM, Chris Arges [off-list ref] wrote:

This still causes crashes for me unless I also have the patch I submitted
earlier applied.

Does your device support touch? Your patch would break two-finger
touch since it resets idx before reaches full packet length.

I'll look at the crashdump in a bit to see what value idx is.

Yes, please get the idx for us. Depends on the actual value, we'll
come up with a solution. I think it will most likely be a specific
workaround for pen if the issue only happens with pen.

Cheers,

Ping

On Mon, May 23, 2016 at 12:26 AM, Ping Cheng [off-list ref] wrote:

quoted

From: wacom <redacted>

I guess the patch that added two-finger touch support forgot to update
W8001_MAX_LENGTH from 11 to 13.

Signed-off-by: Ping Cheng <redacted>
---
 drivers/input/touchscreen/wacom_w8001.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/wacom_w8001.c

b/drivers/input/touchscreen/wacom_w8001.c
index bab3c6a..b1b4127 100644

--- a/drivers/input/touchscreen/wacom_w8001.c
+++ b/drivers/input/touchscreen/wacom_w8001.c

@@ -27,7 +27,7 @@ MODULE_AUTHOR("Jaya Kumar <jayakumar.lkml@gmail.com>");
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");

-#define W8001_MAX_LENGTH       11
+#define W8001_MAX_LENGTH       13
 #define W8001_LEAD_MASK                0x80
 #define W8001_LEAD_BYTE                0x80
 #define W8001_TAB_MASK         0x40
--

1.8.3.1