centos man page for ata_host_activate

ATA_HOST_ACTIVATE(9)						  libata Library					      ATA_HOST_ACTIVATE(9)

NAME
       ata_host_activate - start host, request IRQ and register it

SYNOPSIS
       int ata_host_activate(struct ata_host * host, int irq, irq_handler_t irq_handler, unsigned long irq_flags,
			     struct scsi_host_template * sht);

ARGUMENTS
       host
	   target ATA host

       irq
	   IRQ to request

       irq_handler
	   irq_handler used when requesting IRQ

       irq_flags
	   irq_flags used when requesting IRQ

       sht
	   scsi_host_template to use when registering the host

DESCRIPTION
       After allocating an ATA host and initializing it, most libata LLDs perform three steps to activate the host - start host, request IRQ and
       register it. This helper takes necessasry arguments and performs the three steps in one go.

       An invalid IRQ skips the IRQ registration and expects the host to have set polling mode on the port. In this case, irq_handler should be
       NULL.

LOCKING
       Inherited from calling layer (may sleep).

RETURNS
       0 on success, -errno otherwise.

AUTHOR
       Jeff Garzik
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      ATA_HOST_ACTIVATE(9)