This patch makes the following changes to drivers/scsi/ahci.c - Add definition for SActive register - Add most interrupt sources to default interrupt mask - Write low 32 bits of FIS address to PxFB, where they belong - Set command active bit in PxSACT before setting command issue bit in PxCI - Announce Sub Class Code in driver info message [IDE, SATA or RAID] -- Signed-off-by: Matthijs Melchior