Set sata spd according to spd limit
int sata_set_spd(struct ata_link * link);
link
Link to set SATA spd for
Set SATA spd of link according to sata_spd_limit.
Inherited from caller.
0 if spd doesn't need to be changed, 1 if spd has been changed. Negative errno if SCR registers are inaccessible.
Jeff Garzik
Author.