Man page 9 : ata_do_set_mode

ata_do_set_mode - Program timings and issue SET FEATURES - XFER

int ata_do_set_mode(struct ata_link *  link , struct ata_device **  r_failed_dev );

link
    link on which timings will be programmed

r_failed_dev
    out parameter for failed device

Standard implementation of the function used to tune and set ATA device disk transfer mode (PIO3, UDMA6, etc.). If ata_dev_set_mode fails, pointer to the failing device is returned in r_failed_dev.

PCI/etc. bus probe sem.

0 on success, negative errno otherwise

Jeff Garzik
    Author.