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    [PATCH] libata: fix pio_mask values (take 2) · 7da79312
    Brett Russ 提交于
    ata_get_mode_mask() uses bits 3 and 4 in the pio_mask to represent PIO
    modes 3 and 4.  The value read from the drive, which reports support
    for PIO3 and PIO4 in bits 0 and 1, is shifted left by 3 bits and OR'd
    with 0x7 (which then corresponds to PIO 2-0 in libata).  Thus, the
    drivers below need adjustments to comply with the way pio_mask is
    used.  I changed the masks from the commented values to all support
    PIO4-0, since the spec mandates that PIO0-2 are supported and there's
    no reason not to support PIO3 IMO.
    Signed-off-by: NBrett Russ <russb@emc.com>
    Signed-off-by: NJeff Garzik <jgarzik@pobox.com>
    7da79312
ahci.c 28.7 KB