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android_kernel_xiaomi_sm8350/drivers/acpi
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Venkatesh Pallipadi dcb84f335b cpuidle acpi driver: fix oops on AC<->DC 
cpuidle and acpi driver interaction bug with the way cpuidle_register_driver()
is called. Due to this bug, there will be oops on
AC<->DC on some systems, where they support C-states in one DC and not in AC.

The current code does
ON BOOT:
	Look at CST and other C-state info to see whether more than C1 is
	supported. If it is, then acpi processor_idle does a
	cpuidle_register_driver() call, which internally enables the device.

ON CST change notification (AC<->DC) and on suspend-resume:
	acpi driver temporarily disables device, updates the device with
	any new C-states, and reenables the device.

The problem is is on boot, there are no C2, C3 states supported and we skip
the register. Later on AC<->DC, we may get a CST notification and we try
to reevaluate CST and enabled the device, without actually registering it.
This causes breakage as we try to create /sys fs sub directory, without the
parent directory which is created at register time.

Thanks to Sanjeev for reporting the problem here.
http://bugzilla.kernel.org/show_bug.cgi?id=10394

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2008-06-11 19:13:45 -04:00
..
dispatcher acpi: fix integer as NULL pointer warning 2008-05-23 08:11:06 -07:00
events Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release 2008-04-30 13:58:00 -04:00
executer acpi: fix integer as NULL pointer warning 2008-05-23 08:11:06 -07:00
hardware ACPICA: update Intel copyright 2008-04-23 23:00:13 -04:00
namespace ACPICA: update Intel copyright 2008-04-23 23:00:13 -04:00
parser ACPICA: update Intel copyright 2008-04-23 23:00:13 -04:00
resources ACPICA: update Intel copyright 2008-04-23 23:00:13 -04:00
sleep ACPI: Disable Fixed_RTC event when installing RTC handler 2008-06-11 19:13:45 -04:00
tables ACPICA: update Intel copyright 2008-04-23 23:00:13 -04:00
utilities Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release 2008-04-30 13:58:00 -04:00
ac.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
acpi_memhotplug.c ACPI: autoload modules - Create __mod_acpi_device_table symbol for all ACPI drivers 2007-07-23 13:56:42 -04:00
asus_acpi.c asus_acpi: remove misleading mask 2008-03-18 02:31:34 -04:00
battery.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
bay.c #if 0 acpi/bay.c:eject_removable_drive() 2008-04-29 10:09:52 -04:00
blacklist.c ACPI: DMI: quirk for FSC ESPRIMO Mobile V5505 2008-02-14 02:43:39 -05:00
bus.c x86: validate against acpi motherboard resources 2008-04-26 23:41:03 +02:00
button.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
cm_sbs.c ACPI: clean up ACPI_MODULE_NAME() use 2007-02-12 22:42:12 -05:00
container.c ACPI: autoload modules - Create __mod_acpi_device_table symbol for all ACPI drivers 2007-07-23 13:56:42 -04:00
debug.c ACPI: add control method tracing support 2007-11-19 12:25:46 -05:00
dock.c ACPI: Set flag DOCK_UNDOCKING when triggered via sysfs 2008-03-18 05:16:38 -04:00
ec.c Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-04-30 11:52:52 -07:00
event.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
fan.c Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-04-30 11:52:52 -07:00
glue.c ACPI: Disable Fixed_RTC event when installing RTC handler 2008-06-11 19:13:45 -04:00
Kconfig thermal: add the support for building the generic thermal as a module 2008-04-29 02:44:00 -04:00
Makefile ACPI: SBS: Host controller must initialize before SBS. 2008-02-09 03:22:13 -05:00
numa.c ACPI: misc cleanups 2008-02-07 03:33:23 -05:00
osl.c flush kacpi_notify_wq before removing notify handler 2008-04-29 02:34:42 -04:00
pci_bind.c ACPI: misc cleanups 2008-02-07 03:33:23 -05:00
pci_irq.c ACPI: fix Medion _PRT quirk (use "ISA_", not "ISA") 2008-03-25 15:21:30 -07:00
pci_link.c ACPI: misc cleanups 2008-02-07 03:33:23 -05:00
pci_root.c ACPI: fix section mismatch in acpi_pci_root_add 2008-02-21 02:56:32 -05:00
power.c Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-04-30 11:52:52 -07:00
processor_core.c Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-04-30 11:52:52 -07:00
processor_idle.c cpuidle acpi driver: fix oops on AC<->DC 2008-06-11 19:13:45 -04:00
processor_perflib.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
processor_thermal.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
processor_throttling.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
sbs.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
sbshc.c ACPI: SBS: remove typo from sbchc.c 2008-03-18 05:13:14 -04:00
sbshc.h ACPI: SBS: Ignore alarms coming from unknown devices 2007-12-14 15:14:06 -05:00
scan.c Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', 'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release 2008-04-30 13:58:00 -04:00
system.c acpi: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
tables.c Revert "ACPI: parse 2nd MADT by default" 2007-03-30 14:16:10 -04:00
thermal.c Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2008-04-30 11:52:52 -07:00
toshiba_acpi.c toshiba_acpi: Enable autoloading 2008-03-11 13:35:08 -04:00
utils.c ACPICA: Fixes for external Reference Objects 2008-04-22 19:08:51 -04:00
video.c Fix ACPI vs proc_create_data() mismerge 2008-04-30 16:26:27 -07:00
wmi.c ACPI: WMI: Clean up handling of spec violating data blocks 2008-03-11 17:59:05 -04:00