Sean Young b24dc0aa7e media: rc: ensure that uevent can be read directly after rc device register
commit 896111dc4bcf887b835b3ef54f48b450d4692a1d upstream.

There is a race condition where if the /sys/class/rc0/uevent file is read
before rc_dev->registered is set to true, -ENODEV will be returned.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1901089

Cc: stable@vger.kernel.org
Fixes: a2e2d73fa281 ("media: rc: do not access device via sysfs after rc_unregister_device()")
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-03 23:25:56 +01:00
..
2020-10-29 09:58:01 +01:00