• Paolo Bonzini's avatar
    [libata] scsi: implement MODE SELECT command · 1b26d29c
    Paolo Bonzini authored
    The cache_type file in sysfs lets users configure the disk cache in
    write-through or write-back modes.  However, ata disks do not support
    writing to the file because they do not implement the MODE SELECT
    command.
    
    This patch adds a translation from MODE SELECT (for the caching page
    only) to the ATA SET FEATURES command.  The set of changeable parameters
    answered by MODE SENSE is also adjusted accordingly.
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
    1b26d29c
libata-scsi.c 104 KB