diff options
Diffstat (limited to 'drivers/block/nbd.c')
| -rw-r--r-- | drivers/block/nbd.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 938ca7f5a11f..b1ed2360ef32 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -1747,7 +1747,11 @@ static struct nbd_device *nbd_dev_add(int index, unsigned int refs) mutex_init(&nbd->config_lock); refcount_set(&nbd->config_refs, 0); - refcount_set(&nbd->refs, refs); + /* + * Start out with a zero references to keep other threads from using + * this device until it is fully initialized. + */ + refcount_set(&nbd->refs, 0); INIT_LIST_HEAD(&nbd->list); disk->major = NBD_MAJOR; @@ -1766,6 +1770,11 @@ static struct nbd_device *nbd_dev_add(int index, unsigned int refs) disk->private_data = nbd; sprintf(disk->disk_name, "nbd%d", index); add_disk(disk); + + /* + * Now publish the device. + */ + refcount_set(&nbd->refs, refs); nbd_total_devices++; return nbd; |