• Tejun Heo's avatar
    libata: implement libata.force module parameter · 33267325
    Tejun Heo authored
    This patch implements libata.force module parameter which can
    selectively override ATA port, link and device configurations
    including cable type, SATA PHY SPD limit, transfer mode and NCQ.
    
    For example, you can say "use 1.5Gbps for all fan-out ports attached
    to the second port but allow 3.0Gbps for the PMP device itself, oh,
    the device attached to the third fan-out port chokes on NCQ and
    shouldn't go over UDMA4" by the following.
    
     libata.force=2:1.5g,2.15:3.0g,2.03:noncq,udma4
    Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
    Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
    33267325
libata-core.c 197 KB