tree 3c368fc922977af1760932c55fcfb69e20126cfa
parent f7f154f1246ccc5a0a7e9ce50932627d60a0c878
author Amit Shah <amit.shah@redhat.com> 1362702618 +1100
committer Rusty Russell <rusty@rustcorp.com.au> 1362702643 +1100

virtio: rng: disallow multiple device registrations, fixes crashes

The code currently only supports one virtio-rng device at a time.
Invoking guests with multiple devices causes the guest to blow up.

Check if we've already registered and initialised the driver.  Also
cleanup in case of registration errors or hot-unplug so that a new
device can be used.

Reported-by: Peter Krempa <pkrempa@redhat.com>
Reported-by: <yunzheng@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org