linux/drivers
Rafael J. Wysocki 5294e25671 PCI PM: make the PM core more careful with drivers using the new PM framework
Currently, the PM core always attempts to manage devices with drivers
that use the new PM framework.  In particular, it attempts to disable
the devices (which is unnecessary), to save their state (which may be
undesirable if the driver has done that already) and to put them into
low power states (again, this may be undesirable if the driver has
already put the device into a low power state).  That need not be
the right thing to do, so make the core be more careful in this
respect.

Generally, there are the following categories of devices to consider:
* bridge devices without drivers
* non-bridge devices without drivers
* bridge devices with drivers
* non-bridge devices with drivers
and each of them should be handled differently.

For bridge devices without drivers the PCI PM core will save their
state on suspend and restore it (early) during resume, after putting
them into D0 if necessary.  It will not attempt to do anything else
to these devices.

For non-bridge devices without drivers the PCI PM core will disable
them and save their state on suspend.  During resume, it will put
them into D0, if necessary, restore their state (early) and reenable
them.

For bridge devices with drivers the PCI PM core will only save
their state on suspend if the driver hasn't done that already.
Still, the core will restore their state (early) during resume,
after putting them into D0, if necessary.

For non-bridge devices with drivers the PCI PM core will only save
their state on suspend if the driver hasn't done that already.  Also,
if the state of the device hasn't been saved by the driver, the core
will attempt to put the device into a low power state.  During
resume the core will restore the state of the device (early), after
putting it into D0, if necessary.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-02-04 17:22:35 -08:00
..
accessibility
acpi
amba
ata Fix my email address in qd65xx.[ch]/pata_qdi.c 2009-02-03 16:53:56 -08:00
atm
auxdisplay
base driver-core: fix kernel-doc parameter name 2009-01-28 15:55:48 -08:00
block
bluetooth
cdrom
char Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-02-03 16:52:10 -08:00
clocksource
connector
cpufreq
cpuidle
crypto
dca dca: redesign locks to fix deadlocks 2009-02-02 23:26:57 -08:00
dio
dma
edac powerpc: More printing warning fixes for the l64 to ll64 conversion 2009-01-28 17:15:52 +11:00
eisa
firewire firewire: sbp2: add workarounds for 2nd and 3rd generation iPods 2009-01-29 20:19:48 +01:00
firmware DMI: Introduce dmi_first_match to make the interface more flexible 2009-01-27 02:15:47 -05:00
gpio gpiolib: fix request related issue 2009-01-29 18:04:43 -08:00
gpu Stop playing silly games with the VM_ACCOUNT flag 2009-01-31 15:08:56 -08:00
hid HID: document difference between hid_blacklist and hid_ignore_list 2009-01-29 11:23:12 +01:00
hwmon hwmon: applesmc: add support for MacPro 3 temperature sensors 2009-01-29 18:04:45 -08:00
i2c i2c: Move old eeprom driver to /drivers/misc/eeprom 2009-01-26 21:19:53 +01:00
ide Fix my email address in qd65xx.[ch]/pata_qdi.c 2009-02-03 16:53:56 -08:00
idle
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2009-01-29 18:09:41 -08:00
infiniband
input
isdn isdn: Fix missing ifdef in isdn_ppp 2009-01-26 12:24:38 -08:00
leds
lguest lguest: Fix a memory leak with the lg object during launcher close 2009-01-30 11:34:11 +10:30
macintosh
mca
md
media V4L/DVB (10411): s5h1409: Perform s5h1409 soft reset after tuning 2009-02-01 10:41:02 -02:00
memstick
message
mfd
misc sgi-xp: link XPNET's net_device_ops to its net_device structure 2009-02-03 15:16:48 -08:00
mmc pxamci: enable DMA for write ops after CMD/RESP 2009-02-02 20:57:07 +01:00
mtd Merge master.kernel.org:/home/rmk/linux-2.6-arm 2009-02-03 16:52:10 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2009-02-04 07:52:21 -08:00
nubus
of
oprofile
parisc Documentation: move DMA-mapping.txt to Doc/PCI/ 2009-01-29 18:19:29 -08:00
parport
pci PCI PM: make the PM core more careful with drivers using the new PM framework 2009-02-04 17:22:35 -08:00
pcmcia
platform hp-wmi: set initial docking state 2009-01-29 18:04:45 -08:00
pnp
power power_supply: pda_power: Don't request shared IRQs w/ IRQF_DISABLED 2009-01-26 02:09:26 +03:00
ps3
rapidio
regulator leds: Fix bounds checking of wm8350->pmic.led 2009-01-30 21:50:49 +00:00
rtc
s390 lcs: fix compilation for !CONFIG_IP_MULTICAST 2009-01-25 17:59:26 -08:00
sbus
scsi [SCSI] ibmvfc: Fix DMA mapping leak on memory allocation failure 2009-01-25 08:14:53 -06:00
serial Add enable_ms to jsm driver 2009-01-30 08:40:54 -08:00
sh
sn
spi spi: Move at25 (for SPI eeproms) to /drivers/misc/eeprom 2009-01-26 21:19:54 +01:00
ssb
staging Documentation: move DMA-mapping.txt to Doc/PCI/ 2009-01-29 18:19:29 -08:00
tc
telephony
thermal
uio
usb Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-upstream 2009-02-02 17:52:39 +00:00
uwb uwb: lock rc->rsvs_lock with spin_lock_bh() 2009-01-23 12:57:20 +00:00
video Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2009-02-02 19:26:44 -08:00
virtio virtio-pci: do not oops on config change if driver not loaded 2009-02-02 19:17:56 -08:00
w1
watchdog [ARM] omap: watchdog: allow OMAP watchdog driver on OMAP34xx platforms 2009-01-24 16:48:42 +00:00
xen xen: make sysfs files behave as their names suggest 2009-01-29 13:20:36 +01:00
zorro
Kconfig
Makefile