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Input: fix defuzzing logic

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commit 50c5d36dab930b1f1b1e3348b8608aa8b9ee7610 upstream.

We attempt to remove noise from coordinates reported by devices in
input_handle_abs_event(), unfortunately, unless we were dropping the
event altogether, we were ignoring the adjusted value and were passing
on the original value instead.

Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Torokhov 2014-07-19 16:30:31 -07:00 committed by Greg Kroah-Hartman
parent 23acaf0853
commit 3eda80beb6
1 changed files with 4 additions and 2 deletions
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6
drivers/input/input.c
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@ -257,9 +257,10 @@ static int input_handle_abs_event(struct input_dev *dev,
}
static int input_get_disposition(struct input_dev *dev,
unsigned int type, unsigned int code, int value)
unsigned int type, unsigned int code, int *pval)
{
int disposition = INPUT_IGNORE_EVENT;
int value = *pval;
switch (type) {
@ -357,6 +358,7 @@ static int input_get_disposition(struct input_dev *dev,
break;
}
*pval = value;
return disposition;
}
@ -365,7 +367,7 @@ static void input_handle_event(struct input_dev *dev,
{
int disposition;
disposition = input_get_disposition(dev, type, code, value);
disposition = input_get_disposition(dev, type, code, &value);
if ((disposition & INPUT_PASS_TO_DEVICE) && dev->event)
dev->event(dev, type, code, value);