[PATCH v6 0/7] ZPODD patches

[Aaron Lu <aaron.lwe@gmail.com>]

v6:
When user changes may_power_off flag through sysfs entry and if device
is already runtime suspended, resume resume it so that it can respect
this flag next time it is runtime suspended as suggested by Alan Stern.
Call scsi_autopm_get/put_device once in sr_check_events as suggested by
Alan Stern.

v5:
Add may_power_off flag to scsi device.
Alan Stern suggested that I should not mess runtime suspend with
runtime power off, but the current zpodd implementation made it not
easy to seperate. So I re-wrote the zpodd implementation, the end
result is, normal ODD can also enter runtime suspended state, but
their power won't be removed.

v4:
Rebase on top of Linus' tree, due to this, the problem of a missing
flag in v3 is gone;
Add a new function scsi_autopm_put_device_autosuspend to first mark
last busy for the device and then put autosuspend it as suggested by
Oliver Neukum.
Typo fix as pointed by Sergei Shtylyov.
Check can_power_off flag before any runtime pm operations in sr.

v3:
Rebase on top of scsi-misc tree;
Add the sr related patches previously in Jeff's libata tree;
Re-organize the sr patches.
A problem for now: for patch
scsi: sr: support zero power ODD(ZPODD)
I can't set a flag in libata-acpi.c since a related function is
missing in scsi-misc tree. Will fix this when 3.6-rc1 released.

v2:
Bug fix for v1;
Use scsi_autopm_* in sr driver instead of pm_runtime_*;

v1:
Here are some patches to make ZPODD easier to use for end users and
a fix for using ZPODD with system suspend.

Aaron Lu (7):
  scsi: sr: support runtime pm for ODD
  block: genhd: export disk_(un)block_events
  scsi: sr: block events checking when suspended for zpodd
  libata: acpi: set can_power_off for both ODD and HD
  scsi: pm: add may_power_off flag
  scsi: sr: use may_power_off
  libata: acpi: respect may_power_off flag

 block/genhd.c              |  2 ++
 drivers/ata/libata-acpi.c  | 35 ++++++++++++------
 drivers/scsi/scsi_sysfs.c  | 37 ++++++++++++++++++-
 drivers/scsi/sr.c          | 89 ++++++++++++++++++++++++++++++++++++++++++++--
 drivers/scsi/sr.h          |  1 +
 include/scsi/scsi_device.h |  2 ++
 6 files changed, 152 insertions(+), 14 deletions(-)

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1.7.11.3