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vfio: grab vfio_device reference *before* exposing the sucker via fd_install()

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It's not critical (anymore) since another thread closing the file will block
on ->device_lock before it gets to dropping the final reference, but it's
definitely cleaner that way...

Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-08-17 21:32:56 -04:00
parent 90b1253e41
commit 31605debdf
1 changed files with 2 additions and 2 deletions
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4
drivers/vfio/vfio.c
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@ -1111,10 +1111,10 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
*/
filep->f_mode |= (FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
fd_install(ret, filep);
vfio_device_get(device);
atomic_inc(&group->container_users);
fd_install(ret, filep);
break;
}
mutex_unlock(&group->device_lock);