[PATCH 2/5] Input: zforce_ts: Reject open if initialization not finished

From: Dirk Behme <dirk.behme@de.bosch.com>
To: linux-input@vger.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>,
	Henrik Rydberg <rydberg@bitmath.org>,
	Javier Martinez Canillas <javier@osg.samsung.com>
Cc: Oleksij Rempel <linux@rempel-privat.de>,
	Oleksij Rempel <fixed-term.Oleksij.Rempel@de.bosch.com>,
	Knut Wohlrab <Knut.Wohlrab@de.bosch.com>,
	Dirk Behme <dirk.behme@de.bosch.com>
Subject: [PATCH 2/5] Input: zforce_ts: Reject open if initialization not finished
Date: Wed, 20 Apr 2016 08:54:42 +0200	[thread overview]
Message-ID: <1461135285-17582-2-git-send-email-dirk.behme@de.bosch.com> (raw)
In-Reply-To: <1461135285-17582-1-git-send-email-dirk.behme@de.bosch.com>

From: Oleksij Rempel <linux@rempel-privat.de>

Response EAGAIN when opening the device while BOOT_COMPLETE
notification is not received and initialization of the zForce touch
controller is not finished.

Signed-off-by: Oleksij Rempel <fixed-term.Oleksij.Rempel@de.bosch.com>
Signed-off-by: Knut Wohlrab <Knut.Wohlrab@de.bosch.com>
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
---
 drivers/input/touchscreen/zforce_ts.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/input/touchscreen/zforce_ts.c b/drivers/input/touchscreen/zforce_ts.c
index 0c08220..ddfc120 100644
--- a/drivers/input/touchscreen/zforce_ts.c
+++ b/drivers/input/touchscreen/zforce_ts.c
@@ -690,6 +690,10 @@ static int zforce_input_open(struct input_dev *dev)
 	struct zforce_ts *ts = input_get_drvdata(dev);
 	int ret;
 
+	/* if not probed try again later */
+	if (ts->state == ZF_STATE_UNINITIALZED)
+		return -EAGAIN;
+
 	ret = zforce_start(ts);
 	if (ret)
 		return ret;
-- 
2.8.0

