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path: root/drivers/acpi/scan.c
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2009-01-22MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatc ↵merge
hes-tracking-fix-stray-endmenu-patch-1232632040-1232632141 pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040-1232632141 / fdf777a63bcb59e0dfd78bfe2c6242e01f6d4eb9 ... parent commitmessage: From: merge <null@invalid> MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 stable-tracking-hist top was MERGE-via-mokopatches-tracking-fix-stray-endmenu-patch-1232632040 / 90463bfd2d5a3c8b52f6e6d71024a00e052b0ced ... parent commitmessage: From: merge <null@invalid> MERGE-via-mokopatches-tracking-hist-fix-stray-endmenu-patch mokopatches-tracking-hist top was fix-stray-endmenu-patch / 3630e0be570de8057e7f8d2fe501ed353cdf34e6 ... parent commitmessage: From: Andy Green <andy@openmoko.com> fix-stray-endmenu.patch Signed-off-by: Andy Green <andy@openmoko.com>
2008-10-22Merge branch 'misc' into testLen Brown
2008-10-22Merge branch 'ec' into testLen Brown
2008-10-22Merge branch 'bugzilla-10503' into testLen Brown
2008-10-22Merge branch 'acpica' into testLen Brown
2008-10-22ACPI: replace ACPI_DEBUG_PRINT((ACPI_DB_ERROR, ...) with printkLin Ming
ACPI_DB_ERROR and ACPI_DB_WARN were removed from ACPICA core. So replace ACPI_DEBUG_PRINT((ACPI_DB_ERROR, ...) with printk(KERN_ERR PREFIX ...) and ACPI_DEBUG_PRINT((ACPI_DB_WARN, ...) with printk(KERN_WARNING PREFIX ...) We do not use ACPI_ERROR/ACPI_WARNING since they're not exported, see ------------------------------------------------------------- commit 6468463abd7051fcc29f3ee7c931f9bbbb26f5a4 Author: Len Brown <len.brown@intel.com> Date: Mon Jun 26 23:41:38 2006 -0400 ACPI: un-export ACPI_ERROR() -- use printk(KERN_ERR...) Signed-off-by: Len Brown <len.brown@intel.com> ------------------------------------------------------------- Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-22ACPI: remove unused acpi_is_child_device()Len Brown
Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-22ACPI : Load device driver according to the status of acpi deviceZhao Yakui
According to ACPI spec when the status of some device is not present but functional, the device is valid and the children of this device should be enumerated. It means that the device should be added to linux acpi device tree. But the device driver for this device should not be loaded. The detailed info can be found in the section 6.3.7 of ACPI 3.0b spec. _STA may return bit 0 clear (not present) with bit 3 set (device is functional). This case is used to indicate a valid device for which no device driver should be loaded (for example, a bridge device.). Children of this device may be present and valid. OS should continue enumeration below a device whose _STA returns this bit combination http://bugzilla.kernel.org/show_bug.cgi?id=3358 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Li Shaohua <shaohua.li@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-22ACPI: Attach the ACPI device to the ACPI handle as early as possibleZhao Yakui
Attach the ACPI device to the ACPI handle as early as possible so that OS can get the corresponding ACPI device by the acpi handle in the course of getting the power/wakeup/performance flags. http://bugzilla.kernel.org/show_bug.cgi?id=8049 http://bugzilla.kernel.org/show_bug.cgi?id=11000 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-22ACPI: Get the device power state in the course of scanning deviceZhao Yakui
Get the device power state in the course of scanning device if the device power flag is power_managable. i.e. The device has the _PSx/_PRx object. At the same time before the drivers/acpi/power module is loaded, there is no relation between acpi_power_resource and acpi device. So the first parameter of acpi_power_get_state is changed to acpi_handle. http://bugzilla.kernel.org/show_bug.cgi?id=8049 http://bugzilla.kernel.org/show_bug.cgi?id=11000 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Li Shaohua <shaohua.li@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-11ACPI: Enable EC device immediately after ACPI full initializationZhao Yakui
when there is no ECDT table and no _INI object for EC device, it will be enabled before scanning ACPI device. But it is too late after the following the commit is merged. >commit 7752d5cfe3d11ca0bb9c673ec38bd78ba6578f8e > Author: Robert Hancock <hancockr@shaw.ca> > Date: Fri Feb 15 01:27:20 2008 -0800 >x86: validate against acpi motherboard resources After the above commit is merged, OS will check whether MCFG area is reserved in ACPI motherboard resources by calling the function of acpi_get_devices when there exists MCFG table. In the acpi_get_devices the _STA object will be evaluated to check the status of the ACPI device. On some broken BIOS the MYEC object of EC device is initialized as one, which indicates that EC operation region is already accessible before enabling EC device.So on these broken BIOS the EC operation region will be accessed in course of evaluating the _STA object before enabling EC device, which causes that OS will print the following warning messages: >ACPI Error (evregion-0315): No handler for Region [EC__] (ffff88007f8145e8) [EmbeddedControl] [20080609] >ACPI Error (exfldio-0290): Region EmbeddedControl(3) has no handler [20080321] >ACPI Error (psparse-0530): Method parse/execution failed [\_SB_.PCI0.SBRG. EC__.BAT1._STA] (Node ffff81013fc17a00), AE_NOT_EXIST >ACPI Error (uteval-0233): Method execution failed [\_SB_.PCI0.SBRG.EC__.BAT1. _STA] (Node ffff81013fc17a00), AE_NOT_EXIST Although the above warning message is harmless, it looks confusing. So it is necessary to enable EC device as early as possible.Maybe it is appropriate to enable it immediately after ACPI full initialization. http://bugzilla.kernel.org/show_bug.cgi?id=11255 http://bugzilla.kernel.org/show_bug.cgi?id=11374 http://bugzilla.kernel.org/show_bug.cgi?id=11660 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-10ACPI: catch calls of acpi_driver_data on pointer of wrong typePavel Machek
Catch attempts to use of acpi_driver_data on pointers of wrong type. akpm: rewritten to use proper C typechecking and remove the "function"-used-as-lvalue thing. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-10ACPI: acpi_driver_data could only be applied to acpi_deviceAlexey Starikovskiy
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> CC: Hannes Reinecke <hare@suse.de> Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2008-10-06ACPI: don't enable control method power button as wakeup device when Fixed ↵Zhang Rui
Power button is used don't enable control method power button as wakeup device when Fixed Power button is used. http://bugzilla.kernel.org/show_bug.cgi?id=10503 Tested-by: walken@zoy.org <walken@zoy.org> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-07-21driver core: fix a lot of printk usages of bus_idGreg Kroah-Hartman
We have the dev_printk() variants for this kind of thing, use them instead of directly trying to access the bus_id field of struct device. This is done in order to remove bus_id entirely. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-07-16Merge branch 'linux-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (72 commits) Revert "x86/PCI: ACPI based PCI gap calculation" PCI: remove unnecessary volatile in PCIe hotplug struct controller x86/PCI: ACPI based PCI gap calculation PCI: include linux/pm_wakeup.h for device_set_wakeup_capable PCI PM: Fix pci_prepare_to_sleep x86/PCI: Fix PCI config space for domains > 0 Fix acpi_pm_device_sleep_wake() by providing a stub for CONFIG_PM_SLEEP=n PCI: Simplify PCI device PM code PCI PM: Introduce pci_prepare_to_sleep and pci_back_from_sleep PCI ACPI: Rework PCI handling of wake-up ACPI: Introduce new device wakeup flag 'prepared' ACPI: Introduce acpi_device_sleep_wake function PCI: rework pci_set_power_state function to call platform first PCI: Introduce platform_pci_power_manageable function ACPI: Introduce acpi_bus_power_manageable function PCI: make pci_name use dev_name PCI: handle pci_name() being const PCI: add stub for pci_set_consistent_dma_mask() PCI: remove unused arch pcibios_update_resource() functions PCI: fix pci_setup_device()'s sprinting into a const buffer ... Fixed up conflicts in various files (arch/x86/kernel/setup_64.c, arch/x86/pci/irq.c, arch/x86/pci/pci.h, drivers/acpi/sleep/main.c, drivers/pci/pci.c, drivers/pci/pci.h, include/acpi/acpi_bus.h) from x86 and ACPI updates manually.
2008-07-16ACPI: fix checkpatch.pl complaints in scan.cAlok N Kataria
http://bugzilla.kernel.org/show_bug.cgi?id=9772 Signed-off-by: Alok N Kataria <akataria@vmware.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-07-16fix a deadlock issue when poking "eject" fileZhang Rui
"/sys/devices/LNXSYSTM:00/.../eject" is used to evaluate _EJx method and eject a device in user space. But system hangs when poking the "eject" file because that the device hot-removal code invoke the driver .remove method which will try to remove the "eject" file as a result. Queues the hot-removal function for deferred execution in this patch. http://bugzilla.kernel.org/show_bug.cgi?id=9772 Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2008-07-07ACPI: Introduce acpi_device_sleep_wake functionRafael J. Wysocki
The currect ACPI code attempts to execute _PSW at three different places and in one of them only it tries to execute _DSW before _PSW, which is inconsistent with the other two cases. Move the execution of _DSW and _PSW into a separate function called acpi_device_sleep_wake() and call it wherever appropriate instead of executing _DSW and/or _PSW directly. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2008-04-30Merge branches 'release', 'acpica', 'bugzilla-10224', 'bugzilla-9772', ↵Len Brown
'bugzilla-9916', 'ec', 'eeepc', 'idle', 'misc', 'pm-legacy', 'sysfs-links-2.6.26', 'thermal', 'thinkpad' and 'video' into release
2008-04-29ACPI: Cleanup: Remove unneeded, multiple local dummy variablesThomas Renninger
Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-22ACPICA: Fixes for external Reference ObjectsBob Moore
All Reference Objects returned via the AcpiEvaluteObject interface are now marked as type "REFERENCE" instead of "ANY". The type ANY is now reservered for NULL objects - either NULL package elements or unresolved named references. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-04-09ACPI : Disable the device's ability to wake the sleeping system in the boot ↵Zhao Yakui
phase In some machines some GPE is shared by several ACPI devices, for example: sleep button, keyboard, mouse. At the same time one of them is non-wake(runtime) device and the other are wake devices. In such case OSPM should call the _PSW object to disable the device's ability to wake the sleeping system in the boot phase. Otherwise there will be ACPI interrupt flood triggered by the GPE input. The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. So it is necessary to call _DSW object first. Only when it is not present will the _PSW object used. http://bugzilla.kernel.org/show_bug.cgi?id=10224 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-03-25ACPI: fix a regression of ACPI device driver autoloadingZhang Rui
commit 3620f2f2f39e7870cf1a4fb2e34063a142f28716 sets the cid of ACPI video/dock/bay device and leaves the hid empty. As a result, "modalias" should export the cid for devices which don't have a hid. ACPI Video driver is not autoloaded with commit 3620f2f2f39e7870cf1a4fb2e34063a142f28716 applied. "cat /sys/.../device:03(acpi video bus)/modalias" shows nothing. ACPI Video driver is autoloaded after revert that commit. "cat /sys/.../LNXVIDEO:0x/modalias" shows "acpi:LNXVIDEO:" ACPI Video driver is autoloaded with commit 3620f2f2f39e7870cf1a4fb2e34063a142f28716 and this patch applied. "cat /sys/.../device:03(acpi video bus)/modalias" shows "acpi:LNXVIDEO:" Signed-off-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2008-03-13Merge branches 'release', 'ejd', 'sony' and 'wmi' into releaseLen Brown
2008-03-11ACPI: replace remaining __FUNCTION__ occurrencesHarvey Harrison
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-21ACPI: Do not pass NULL to acpi_get_handle() when looking for _EJDHolger Macht
When trying to get the acpi_handle from an acpi_buffer, pass ACPI_ROOT_OBJECT instead of NULL to acpi_get_handle(). This fixes the detection of dock dependent bays. Signed-off-by: Holger Macht <hmacht@suse.de> Tested-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-07Merge branches 'release' and 'fluff' into releaseLen Brown
Conflicts: drivers/acpi/scan.c include/linux/acpi.h Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-07ACPI: add missing prink prefix stringsLen Brown
Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-07Merge branches 'release' and 'autoload' into releaseLen Brown
2008-02-03drivers/acpi/: Spelling fixesJoe Perches
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
2008-01-01ACPI: EC: Enable boot EC before bus_scanAlexey Starikovskiy
Some _STA methods called during bus_scan() might require EC region handler, which might be enabled later in the scan. Enable it explicitly before scan to avoid errors. Reference: http://bugzilla.kernel.org/show_bug.cgi?id=9627 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2007-12-08ACPI: Fix autloading of dock, video, bay and all linux specific HID driversFrank Seidel
References: https://bugzilla.novell.com/show_bug.cgi?id=302482 Due to the new autloading of acpi drivers, the dock driver wasn't loaded anymore as there is no HID to identify it with (dock is needed if ACPI has a _DCK method). This patch is a workaround for this, original by Thomas Renninger, revised first by Kay Sievers and last by Frank Seidel. V2 of this patch fixed problems on systems without a defined _CID for the docking devices. Signed-off-by: Thomas Renninger <trenn@novell.com> Signed-off-by: Kay Sievers <kasievers@novell.com> Signed-off-by: Frank Seidel <fseidel@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
2007-10-12Driver core: change add_uevent_var to use a structKay Sievers
This changes the uevent buffer functions to use a struct instead of a long list of parameters. It does no longer require the caller to do the proper buffer termination and size accounting, which is currently wrong in some places. It fixes a known bug where parts of the uevent environment are overwritten because of wrong index calculations. Many thanks to Mathieu Desnoyers for finding bugs and improving the error handling. Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-08-25make drivers/acpi/scan.c:create_modalias() staticAdrian Bunk
This patch makes the needlessly global create_modalias() static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Len Brown <len.brown@intel.com>
2007-07-23ACPI: autoload modules - Create ACPI alias interfaceThomas Renninger
Modify modpost (file2alias.c) to add acpi*:XYZ0001: alias in modules.alias like: grep acpi /lib/modules/2.6.22-rc4-default/modules.alias alias acpi*:SNY5001:* sony_laptop alias acpi*:SNY6001:* sony_laptop for e.g. the sony_laptop module. This module matches against all ACPI devices with a HID or CID of SNY5001 or SNY6001 Export an uevent and modalias sysfs file containing the string: [MODALIAS=]acpi:PNP0C0C: additional CIDs are concatenated at the end. Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Len Brown <len.brown@intel.com>
2007-05-08PNPACPI sets pnpdev->dev.archdataDavid Brownell
Teach PNPACPI how to hook up its devices to their ACPI nodes, so that pnpdev->dev.archdata points to the parallel acpi device node. Previously this only worked for PCI, leaving a notable hole. Export "acpi_bus_type" so this can work. Remove some extraneous whitespace. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-25ACPI: use _STA bit names rather than 0x0FBjorn Helgaas
Be explicit about what "device->status = 0x0F" really means. syntax only. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-12ACPI: delete extra #defines in /drivers/acpi/ driversLen Brown
Cosmetic only. Except in a single case, #define ACPI_*_DRIVER_NAME were invoked 0 or 1 times. Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-12ACPI: clean up ACPI_MODULE_NAME() useLen Brown
cosmetic only Make "module name" actually match the file name. Invoke with ';' as leaving it off confuses Lindent and gcc doesn't care. Fix indentation where Lindent did get confused. Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-03Pull trivial into test branchLen Brown
Conflicts: drivers/acpi/scan.c Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-03ACPI: bay: Convert ACPI Bay driver to be compatible with sysfs update.Zhang Rui
Set fake hid for ejectable drive bay. Match bay devices by checking the hid. Remove .match method of Bay driver. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-03Pull sysfs into test branchLen Brown
Conflicts: Documentation/feature-removal-schedule.txt include/acpi/acpi_drivers.h Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-02ACPICA: use new ACPI headers.Alexey Starikovskiy
Signed-off-by: Len Brown <len.brown@intel.com>
2007-02-02ACPICA: minimal patch to integrate new tables into LinuxAlexey Starikovskiy
Signed-off-by: Len Brown <len.brown@intel.com>
2007-01-30ACPI: delete unused acpi_device_get_debug_info()Len Brown
Signed-off-by: Len Brown <len.brown@intel.com>
2007-01-30ACPI: Correct ACPI_DEBUG_OUTPUT typoRobert P. J. Day
-#ifdef CONFIG_ACPI_DEBUG_OUTPUT +#ifdef ACPI_DEBUG_OUTPUT As the former doesn't exist. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Len Brown <len.brown@intel.com>
2007-01-05ACPI: use more understandable bus_id for ACPI devicesZhang Rui
Some of the ACPI devices use the internal fake hids which are exposed to userspace as devces' bus_id after sysfs conversion. To make it more friendly, we convert them to more understandable strings. For those devices w/o PNPids, we use "device:instance_no" as the bus_id instead of "PNPIDNON:instance_no". Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-12-21ACPI: fix Supermicro X7DB8+ Boot regressionRui Zhang
http://bugzilla.kernel.org/show_bug.cgi?id=7695 Originally we converted bind/unbind to use a new pci bridge driver. The driver will add/remove _PRT, so we can eventually remove .bind/.unbind methods. But we found that some of the _ADR-Based devices don't have _PRT, i.e. they are not managed by the new ACPI PCI bridge driver. So that .bind method is not called for some _ADR-Based devices, which leads to a failure. Now we make ACPI PCI Root Bridge Driver scan and binds all _ADR-Based devices once the driver is loaded, in the .add method of ACPI PCI Root Bridge driver. Extra code path for calling .bind/.unbind when _ADR-Based devices are hot added/removed is also added. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2006-12-21ACPI: use PNPID:instance_no as bus_id of ACPI deviceZhang Rui
Previously we used the device name in the DSDT, but would crash upon encountering a duplicate. Also, exposing the DSDT device name to the user in a patch isn't a good idea, because it is arbitrary. After some discussion, we finally decided to use "PNPID:instance_no" as the bus_id of ACPI devices. Two attributes for each device are added at the same time, the full pathname in ACPI namespace and hardware_id if it has. NOTE: acpi_bus_id_list is used to keep the information of PNPID and instance number of the given PNPID. Loop the acpi_bus_id_list to find the instance_no of the same PNPID when register a device. If failed, i.e. we don't have a node with this PNPID, allocate one and link it to this list. NOTE: Now I don't take the memory free work in charge. If necessary, I can add a reference count in struct acpi_device_bus_id, and check the reference and when unregister a device, i.e. memory is freed when the reference count of a given PNPID is 0. Signed-off-by: Li Shaohua <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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