centos man page for ata_down_xfermask_limit

ATA_DOWN_XFERMASK_LI(9) 				       libata Core Internals					   ATA_DOWN_XFERMASK_LI(9)

NAME
       ata_down_xfermask_limit - adjust dev xfer masks downward

SYNOPSIS
       int ata_down_xfermask_limit(struct ata_device * dev, unsigned int sel);

ARGUMENTS
       dev
	   Device to adjust xfer masks

       sel
	   ATA_DNXFER_* selector

DESCRIPTION
       Adjust xfer masks of dev downward. Note that this function does not apply the change. Invoking ata_set_mode afterwards will apply the
       limit.

LOCKING
       Inherited from caller.

RETURNS
       0 on success, negative errno on failure

AUTHOR
       Jeff Garzik
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   ATA_DOWN_XFERMASK_LI(9)