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

Message ID 1461135285-17582-2-git-send-email-dirk.behme@de.bosch.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dirk Behme April 20, 2016, 6:54 a.m. UTC 
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(+)
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Patch

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;