suse man page for ata_wait_ready

ATA_WAIT_READY(9)					       libata Core Internals						 ATA_WAIT_READY(9)

NAME
       ata_wait_ready - wait for link to become ready

SYNOPSIS
       int ata_wait_ready(struct ata_link * link, unsigned long deadline, int (*check_ready) (struct ata_link *link));

ARGUMENTS
       link
	   link to be waited on

       deadline
	   deadline jiffies for the operation

       check_ready
	   callback to check link readiness

DESCRIPTION
       Wait for link to become ready.  check_ready should return positive number if link is ready, 0 if it isn't, -ENODEV if link doesn't seem to
       be occupied, other errno for other error conditions.

       Transient -ENODEV conditions are allowed for ATA_TMOUT_FF_WAIT.

LOCKING
       EH context.

RETURNS
       0 if linke is ready before deadline; otherwise, -errno.

AUTHOR
       Jeff Garzik
	   Author.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							 ATA_WAIT_READY(9)