struct nand_hw_control — Control structure for hardware controller (e.g ECC generator) shared among independent devices


struct nand_hw_control {
  spinlock_t lock;
  struct nand_chip * active;
  wait_queue_head_t wq;


spinlock_t lock

protection lock

struct nand_chip * active

the mtd device which holds the controller currently

wait_queue_head_t wq

wait queue to sleep on if a NAND operation is in progress used instead of the per chip wait queue when a hw controller is available.