• Tejun Heo's avatar
    [SCSI] sd: implement sd_check_events() · 2bae0093
    Tejun Heo authored
    Replace sd_media_change() with sd_check_events().
    * Move media removed logic into set_media_not_present() and
      media_not_present() and set sdev->changed iff an existing media is
      removed or the device indicates UNIT_ATTENTION.
    * Make sd_check_events() sets sdev->changed if previously missing
      media becomes present.
    * Event is reported only if sdev->changed is set.
    This makes media presence event reported if scsi_disk->media_present
    actually changed or the device indicated UNIT_ATTENTION.  For backward
    compatibility, SDEV_EVT_MEDIA_CHANGE is generated each time
    sd_check_events() detects media change event.
    [jejb: fix boot failure]
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Acked-by: default avatarJens Axboe <jaxboe@fusionio.com>
    Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
sd.c 72.3 KB