media: rc: ensure input/lirc device can be opened after register

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@vger.kernel.org # v4.16+
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index b67be33bd62f5a872fa322663245a532ceb9b006..cea7b2d2e60a0fc0b60b89396f1e32dde4ad9ccd 100644 (file)
--- 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 *dev)
                 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 *dev)
                        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");