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linux-next/drivers/base
Rafael J. Wysocki 80de3d7f41 PM / Domains: Do not stop devices after restoring their states
While resuming a device belonging to a PM domain,
pm_genpd_runtime_resume() calls __pm_genpd_restore_device() to
restore its state, if necessary.  The latter starts the device,
using genpd_start_dev(), restores its state, using
genpd_restore_dev(), and then stops it, using genpd_stop_dev().
However, this last operation is not necessary, because the
device is supposed to be operational after pm_genpd_runtime_resume()
has returned and because of it pm_genpd_runtime_resume() has to
call genpd_start_dev() once again for the "restored" device, which
is inefficient.

To make things more efficient, remove the call to genpd_stop_dev()
from __pm_genpd_restore_device() and the direct call to
genpd_start_dev() from pm_genpd_runtime_resume().  [Of course,
genpd_start_dev() still has to be called by it for devices with the
power.irq_safe flag set, because __pm_genpd_restore_device() is not
executed for them.]

This change has been tested on the SH7372 Mackerel board.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-07-01 13:31:29 +02:00
..
power PM / Domains: Do not stop devices after restoring their states 2012-07-01 13:31:29 +02:00
regmap regmap: Export regmap_reinit_cache() 2012-06-08 05:57:21 +08:00
attribute_container.c [SCSI] attirbute_container: Initialize sysfs attributes with sysfs_attr_init 2010-03-27 15:15:24 -04:00
base.h driver core: move the deferred probe pointer into the private area 2012-03-08 12:17:22 -08:00
bus.c Revert "driver core: check start node in klist_iter_init_node" 2012-04-19 19:17:30 -07:00
class.c Revert "driver core: check start node in klist_iter_init_node" 2012-04-19 19:17:30 -07:00
core.c driver-core: extend dev_printk() to pass structured data 2012-05-07 17:12:03 -07:00
cpu.c sched: Remove stale power aware scheduling remnants and dysfunctional knobs 2012-05-17 13:48:56 +02:00
dd.c driver core: fixup reversed deferred probe order 2012-06-13 13:42:39 -07:00
devres.c devres: Add devres_release() 2012-05-04 16:33:16 -07:00
devtmpfs.c devtmpfs: fix 'the the' typo 2012-04-18 15:37:35 -07:00
dma-buf.c dma-buf updates for 3.5 2012-05-25 09:37:26 -07:00
dma-coherent.c common: add dma_mmap_from_coherent() function 2012-05-21 15:06:09 +02:00
dma-contiguous.c drivers: add Contiguous Memory Allocator 2012-05-21 15:09:37 +02:00
dma-mapping.c drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
driver.c Driver Core: don't oops with unregistered driver in driver_find_device() 2012-05-14 08:46:01 -07:00
firmware_class.c firmware_class: Move request_firmware_nowait() to workqueues 2012-03-28 23:31:00 +02:00
firmware.c firmware: change firmware_kset to firmware_kobj 2008-01-24 20:40:23 -08:00
hypervisor.c drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
init.c driver-core: implement 'sysdev' functionality for regular devices and buses 2011-12-14 14:29:38 -08:00
isa.c dma-mapping: replace all DMA_24BIT_MASK macro with DMA_BIT_MASK(24) 2009-04-07 08:31:12 -07:00
Kconfig drivers: add Contiguous Memory Allocator 2012-05-21 15:09:37 +02:00
Makefile drivers: add Contiguous Memory Allocator 2012-05-21 15:09:37 +02:00
map.c [PATCH] kobj_map semaphore to mutex conversion 2006-03-20 13:42:58 -08:00
memory.c Linux 3.3-rc7 2012-03-14 07:44:11 +01:00
module.c driver core: module.c: Use kasprintf 2010-05-21 09:37:29 -07:00
node.c mm: fix off-by-one bug in print_nodes_state() 2012-05-29 16:22:19 -07:00
platform.c drivercore: Output common devicetree information in uevent 2012-02-01 14:26:30 -07:00
soc.c mode_t whack-a-mole: ->is_visible() returns umode_t... 2012-05-29 23:28:42 -04:00
syscore.c PM: Reintroduce dropped call to check_wakeup_irqs 2011-07-11 10:51:49 +02:00
topology.c cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystem 2011-12-21 14:29:42 -08:00
transport_class.c drivers/base: transport_class explicitly requires EXPORT_SYMBOL 2011-10-31 19:31:15 -04:00