tree db1aef23fcc5c191a3b4fc1255aee5d46b50558f
parent eeb8a7e8bb123e84daeef84f5a2eab99ad2839a2
author Michael S. Tsirkin <mst@redhat.com> 1425524081 +1030
committer Rusty Russell <rusty@rustcorp.com.au> 1425950308 +1030

virtio_balloon: set DRIVER_OK before using device

virtio spec requires that all drivers set DRIVER_OK
before using devices. While balloon isn't yet
included in the virtio 1 spec, previous spec versions
also required this.

virtio balloon might violate this rule: probe calls
kthread_run before setting DRIVER_OK, which might run
immediately and cause balloon to inflate/deflate.

To fix, call virtio_device_ready before running the kthread.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org