[PATCH 4.17 62/70] media: rc: ensure input/lirc device can be opened after register

[Greg Kroah-Hartman]

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sean Young <sean@xxxxxxxx>

commit d7832cd2a3c87eb6ae1e802c88b6fc56c5823f6d upstream.

Since commit cb84343fced1 ("media: lirc: do not call close() or open() on
unregistered devices") rc_open() will return -ENODEV if rcdev->registered
is false. Ensure this is set before we register the input device and the
lirc device, else we have a short window where the neither the lirc or
input device can be opened.

Fixes: cb84343fced1 ("media: lirc: do not call close() or open() on unregistered devices")

Cc: stable@xxxxxxxxxxxxxxx # v4.16+
Signed-off-by: Sean Young <sean@xxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/media/rc/rc-main.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1860,6 +1860,8 @@ int rc_register_device(struct rc_dev *de
 		 dev->device_name ?: "Unspecified device", path ?: "N/A");
 	kfree(path);
 
+	dev->registered = true;
+
 	if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
 		rc = rc_setup_rx_device(dev);
 		if (rc)
@@ -1879,8 +1881,6 @@ int rc_register_device(struct rc_dev *de
 			goto out_lirc;
 	}
 
-	dev->registered = true;
-
 	dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor,
 		dev->driver_name ? dev->driver_name : "unknown");