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 necessary
       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).

RETURN
       0 on success, -errno otherwise.

AUTHOR
       Jeff Garzik
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      ATA_HOST_ACTIVATE(9)