Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull firewire updates from Stefan Richter:
 "IEEE 1394 subsystem updates:
   - clean up firewire-ohci's longlived vm-mapping
   - use target instance lock instead of core lock in firewire-sbp2"

* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: sbp2: replace card lock by target lock
  firewire: sbp2: replace some spin_lock_irqsave by spin_lock_irq
  firewire: sbp2: protect a reference counter properly
  firewire: core: document fw_csr_string's truncation of long strings
  firewire: ohci: replace vm_map_ram() with vmap()