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(parent: 6d2cd3c) | patch
vfio: get rid of vfio_device_put()/vfio_group_get_device* races
authorAl Viro <viro@zeniv.linux.org.uk>
Sat, 18 Aug 2012 01:29:06 +0000 (21:29 -0400)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 22 Aug 2012 14:26:13 +0000 (10:26 -0400)
commit90b1253e4139776e8257914ae9e2292d0de2fecc
tree47ed9f35d8f58d42f6e3c8614d355b1edc86f51btree | snapshot
parent6d2cd3ce815b302e885b44ca1bdbe3c7db321c7acommit | diff
vfio: get rid of vfio_device_put()/vfio_group_get_device* races

we really need to make sure that dropping the last reference happens
under the group->device_lock; otherwise a loop (under device_lock)
might find vfio_device instance that is being freed right now, has
already dropped the last reference and waits on device_lock to exclude
the sucker from the list.

Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
drivers/vfio/vfio.c diff | blob | history
John Crispins staging tree