ata_host_start — start and freeze ports of an ATA host
|struct ata_host * host|
Start and then freeze ports of
host. Started status is
recorded in host->flags, so this function can be called
multiple times. Ports are guaranteed to get started only
once. If host->ops isn't initialized yet, its set to the
first non-dummy port ops.
LOCKING: Inherited from calling layer (may sleep).