• Kay Sievers's avatar
    [PATCH] ide: MODALIAS support for autoloading of ide-cd, ide-disk, ... · 263756ec
    Kay Sievers authored
    IDE: MODALIAS support for autoloading of ide-cd, ide-disk, ...
    Add MODULE_ALIAS to IDE midlayer modules: ide-disk, ide-cd, ide-floppy and
    ide-tape, to autoload these modules depending on the probed media type of
    the IDE device.
    It is used by udev and replaces the former agent shell script of the hotplug
    package, which was required to lookup the media type in the proc filesystem.
    Using proc was racy, cause the media file is created after the hotplug event
    is sent out.
    The module autoloading does not take any effect, until something like the
    following udev rule is configured:
      SUBSYSTEM=="ide",  ACTION=="add", ENV{MODALIAS}=="?*", RUN+="/sbin/modprobe $env{MODALIAS}"
    The module ide-scsi will not be autoloaded, cause it requires manual
    configuration. It can't be, and never was supported for automatic setup in
    the hotplug package. Adding a MODULE_ALIAS to ide-scsi for all supported
    media types, would just lead to a default blacklist entry anyway.
      $ modinfo ide-disk
      filename:       /lib/modules/2.6.15-rc4-g1b0997f5/kernel/drivers/ide/ide-disk.ko
      description:    ATA DISK Driver
      alias:          ide:*m-disk*
      license:        GPL
      $ modprobe -vn ide:m-disk
      insmod /lib/modules/2.6.15-rc4-g1b0997f5/kernel/drivers/ide/ide-disk.ko
      $ cat /sys/bus/ide/devices/0.0/modalias
    It also adds attributes to the IDE device:
      $ tree /sys/bus/ide/devices/0.0/
      |-- bus -> ../../../../../../../bus/ide
      |-- drivename
      |-- media
      |-- modalias
      |-- power
      |   |-- state
      |   `-- wakeup
      `-- uevent
      $ cat /sys/bus/ide/devices/0.0/{modalias,drivename,media}
    Signed-off-by: default avatarKay Sievers <kay.sievers@suse.de>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
ide-disk.c 36.3 KB