Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: appletouch - remove extra KERN_DEBUG use from dprintk
  Input: bu21013_ts - fix null dereference in error handling
  Input: ad7879 - prevent invalid finger data reports

2 files changed, 28 insertions, 6 deletions

diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c
index ba6f0bd..bc3b518 100644
--- a/drivers/input/touchscreen/ad7879.c
+++ b/drivers/input/touchscreen/ad7879.c
@@ -129,6 +129,9 @@ struct ad7879 {
 	u16			cmd_crtl1;
 	u16			cmd_crtl2;
 	u16			cmd_crtl3;
+	int			x;
+	int			y;
+	int			Rt;
 };
 
 static int ad7879_read(struct ad7879 *ts, u8 reg)
@@ -175,13 +178,32 @@ static int ad7879_report(struct ad7879 *ts)
 		Rt /= z1;
 		Rt = (Rt + 2047) >> 12;
 
-		if (!timer_pending(&ts->timer))
+		/*
+		 * Sample found inconsistent, pressure is beyond
+		 * the maximum. Don't report it to user space.
+		 */
+		if (Rt > ts->pressure_max)
+			return -EINVAL;
+
+		/*
+		 * Note that we delay reporting events by one sample.
+		 * This is done to avoid reporting last sample of the
+		 * touch sequence, which may be incomplete if finger
+		 * leaves the surface before last reading is taken.
+		 */
+		if (timer_pending(&ts->timer)) {
+			/* Touch continues */
 			input_report_key(input_dev, BTN_TOUCH, 1);
+			input_report_abs(input_dev, ABS_X, ts->x);
+			input_report_abs(input_dev, ABS_Y, ts->y);
+			input_report_abs(input_dev, ABS_PRESSURE, ts->Rt);
+			input_sync(input_dev);
+		}
+
+		ts->x = x;
+		ts->y = y;
+		ts->Rt = Rt;
 
-		input_report_abs(input_dev, ABS_X, x);
-		input_report_abs(input_dev, ABS_Y, y);
-		input_report_abs(input_dev, ABS_PRESSURE, Rt);
-		input_sync(input_dev);
 		return 0;
 	}
 
diff --git a/drivers/input/touchscreen/bu21013_ts.c b/drivers/input/touchscreen/bu21013_ts.c
index ccde586..2ca9e5d 100644
--- a/drivers/input/touchscreen/bu21013_ts.c
+++ b/drivers/input/touchscreen/bu21013_ts.c
@@ -514,7 +514,7 @@ err_free_irq:
 err_cs_disable:
 	pdata->cs_dis(pdata->cs_pin);
 err_free_mem:
-	input_free_device(bu21013_data->in_dev);
+	input_free_device(in_dev);
 	kfree(bu21013_data);
 
 	return error;