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path: root/drivers/acpi
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2009-08-02Merge branch 'misc-2.6.31' into releaseLen Brown1-1/+1
2009-08-02Merge branch 'memhotplug-crash' into releaseLen Brown1-9/+25
2009-08-02ACPI: Ingore the memory block with zero block size in course of memory hotplugZhao Yakui1-3/+15
If the memory block size is zero, ignore it and don't do the memory hotplug flowchart. Otherwise it will complain the following warning message: >System RAM resource 0 - ffffffffffffffff cannot be added Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-02ACPI: Don't treat generic error as ACPI error code in acpi memory hotplug driverZhao Yakui1-6/+10
Don't treat the generic error as ACPI error code. Otherwise when the generic code is returned, it will complain the following warning messag: >ACPI Exception (acpi_memhotplug-0171): UNKNOWN_STATUS_CODE, Cannot get acpi bus device [20080609] >ACPI: Cannot find driver data > ACPI Error (utglobal-0127): Unknown exception code: 0xFFFFFFED [20080609] > Pid: 85, comm: kacpi_notify Not tainted 2.6.27.19-5-default #1 Call Trace: [<ffffffff8020da29>] show_trace_log_lvl+0x41/0x58 [<ffffffff8049a3da>] dump_stack+0x69/0x6f ..... At the same time when the generic error code is returned, the ACPI_EXCEPTION is replaced by the printk. Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-02Merge branch 'bugzilla-13751' into releaseLen Brown1-0/+25
2009-08-02ACPI: bind workqueues to CPU 0 to avoid SMI corruptionBjorn Helgaas1-0/+25
On some machines, a software-initiated SMI causes corruption unless the SMI runs on CPU 0. An SMI can be initiated by any AML, but typically it's done in GPE-related methods that are run via workqueues, so we can avoid the known corruption cases by binding the workqueues to CPU 0. References: http://bugzilla.kernel.org/show_bug.cgi?id=13751 https://bugs.launchpad.net/bugs/157171 https://bugs.launchpad.net/bugs/157691 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-08-02Merge branch 'bugzilla-13620-revert' into releaseLen Brown3-0/+31
2009-08-02ACPI: root-only read protection on /sys/firmware/acpi/tables/*Len Brown1-1/+1
they were world readable. Signed-off-by: Len Brown <len.brown@intel.com>
2009-07-29PM / ACPI: HP G7000 Notebook needs a SCI_EN resume quirkBartlomiej Zolnierkiewicz1-0/+8
This fixes regression (battery "vanishing" on resume) introduced by commit d0c71fe7ebc180f1b7bc7da1d39a07fc19eec768 ("ACPI Suspend: Enable ACPI during resume if SCI_EN is not set") and also the issue with the "screaming" IRQ 9. Fixes http://bugzilla.kernel.org/show_bug.cgi?id=13745 Reported-and-tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Cc: stable@kernel.org Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by: Len Brown <lenb@kernel.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2009-07-28Revert "ACPICA: Remove obsolete acpi_os_validate_address interface"Len Brown3-0/+31
This reverts commit f9ca058430333c9a24c5ca926aa445125f88df18. which caused a regression: http://bugzilla.kernel.org/show_bug.cgi?id=13620 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-26ACPI: video: prevent NULL deref in acpi_get_pci_dev()Troy Moure1-1/+1
ref: http://thread.gmane.org/gmane.linux.kernel/857228/focus=857468 When the ACPI video driver initializes, it does a namespace walk looking for for supported devices. When we find an appropriate handle, we walk up the ACPI tree looking for a PCI root bus, and then walk back down the PCI bus, assuming that every device inbetween is a P2P bridge. This assumption is not correct, and is reported broken on at least: Dell Latitude E6400 ThinkPad X61 Dell XPS M1330 Add a NULL deref check to prevent boot panics. Reported-by: Alessandro Suardi <alessandro.suardi@gmail.com> Signed-off-by: Troy Moure <twmoure@szypr.net> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24Merge branch 'bjorn-notify' into releaseLen Brown3-106/+39
Conflicts: drivers/platform/x86/eeepc-laptop.c Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24Merge branches 'acerhdf', 'acpi-pci-bind', 'bjorn-pci-root', ↵Len Brown12-585/+382
'bugzilla-12904', 'bugzilla-13121', 'bugzilla-13396', 'bugzilla-13533', 'bugzilla-13612', 'c3_lock', 'hid-cleanups', 'misc-2.6.31', 'pdc-leak-fix', 'pnpacpi', 'power_nocheck', 'thinkpad_acpi', 'video' and 'wmi' into release
2009-06-24ACPI: Rename ACPI processor device bus IDZhao Yakui1-1/+10
Some BIOS re-use the same processor bus id in different scope: \_SB.SCK0.CPU0 \_SB.SCK1.CPU0 But the (deprecated) /proc/acpi/ interface assumes the bus-id's are unique, resulting in an OOPS when the processor driver is loaded: WARNING: at fs/proc/generic.c:590 proc_register+0x148/0x180() Hardware name: Sunrise Ridge proc_dir_entry 'processor/CPU0' already registered Call Trace: [<ffffffff8023f7ef>] warn_slowpath+0xb1/0xe5 [<ffffffff8036243b>] ? ida_get_new_above+0x190/0x1b1 [<ffffffff803625a8>] ? idr_pre_get+0x5f/0x75 [<ffffffff8030b2f6>] proc_register+0x148/0x180 [<ffffffff8030b4ff>] proc_mkdir_mode+0x3d/0x52 [<ffffffff8030b525>] proc_mkdir+0x11/0x13 [<ffffffffa0014b89>] acpi_processor_start+0x755/0x9bc [processor] Rename the processor device bus id. And the new bus id will be generated as the following format: CPU+ CPU ID For example: If the cpu ID is 5, then the bus ID will be "CPU5". If the CPU ID is 10, then the bus ID will be "CPUA". Yes, this will change the directory names seen in /proc/acpi/processor/* on some systems. Before this patch, those directory names where totally arbitrary strings based on the interal AML device strings. http://bugzilla.kernel.org/show_bug.cgi?id=13612 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24ACPI: video: DMI workaround broken Acer 7720 BIOS enabling display brightnessZhang Rui1-0/+8
http://bugzilla.kernel.org/show_bug.cgi?id=13121 Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24ACPI: run ACPI device hot removal in kacpi_hotplug_wqZhang Rui1-12/+8
Now that new interface is available, convert to using it rather than creating a new kernel thread. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24ACPI: Add the reference count to avoid unloading ACPI video bus twiceZhao Yakui1-6/+35
Sometimes both acpi video and i915 driver are compiled as modules. And there exists the strict dependency between the two drivers. The acpi video bus will be unloaded in course of unloading the i915 driver. If we unload the acpi video driver, then the kernel oops will be triggered. Add the reference count to avoid unloading the ACPI video bus twice. The reference count should be checked before unregistering the acpi video bus. If the reference count is already zero, it won't unregister it again. And after the acpi video bus is already unregistered, the reference count will be set to zero. http://bugzilla.kernel.org/show_bug.cgi?id=13396 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Acked-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24ACPI: DMI to disable Vista compatibility on some Sony laptopsZhang Rui1-0/+16
Linux claims Vista compatibility to the BIOS for a number of reasons, but this brings hard lockup on some Sony laptops. Disable Vista compatibility via DMI for these laptops unless we can figure out what Vista is doing for this platform. http://bugzilla.kernel.org/show_bug.cgi?id=12904 Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24ACPI: fix a deadlock in hotplug caseZhang Rui1-9/+16
we used to run the hotplug code in keventd_wq. But when hot removing the ACPI battery device, power_supply_unregister invokes flush_scheduled_work. This causes a deadlock. i.e 1. When dock is unplugged, all the hotplug code is run on kevent_wq. 2. the hotplug code removes all the child devices of dock device. 3. removing the child device may invoke flush_scheduled_work 4. flush_scheduled_work waits until all the work on kevent_wq to be finished, while this will never be true because the hotplug code is running on keventd_wq... Introduce a new workqueue for hotplug in this patch. http://bugzilla.kernel.org/show_bug.cgi?id=13533 Tested-by: Paul Martin <pm@debian.org> Tested-by: Vojtech Gondzala <vojtech.gondzala@gmail.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-24Show the physical device node of backlight class device.Zhang Rui1-0/+6
Create symbol link from backlight class device to ACPI video device. More and more laptops are shipped with multiple ACPI video devices, while we export only one of them to userspace. With this patch applied, we can know which ACPI video device is used by "cat /sys/class/backlight/acpi_video0/device/path". Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-22Merge branch 'linux-next' of ↵Linus Torvalds1-0/+1
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: (74 commits) PCI: make msi_free_irqs() to use msix_mask_irq() instead of open coded write PCI: Fix the NIU MSI-X problem in a better way PCI ASPM: remove get_root_port_link PCI ASPM: cleanup pcie_aspm_sanity_check PCI ASPM: remove has_switch field PCI ASPM: cleanup calc_Lx_latency PCI ASPM: cleanup pcie_aspm_get_cap_device PCI ASPM: cleanup clkpm checks PCI ASPM: cleanup __pcie_aspm_check_state_one PCI ASPM: cleanup initialization PCI ASPM: cleanup change input argument of aspm functions PCI ASPM: cleanup misc in struct pcie_link_state PCI ASPM: cleanup clkpm state in struct pcie_link_state PCI ASPM: cleanup latency field in struct pcie_link_state PCI ASPM: cleanup aspm state field in struct pcie_link_state PCI ASPM: fix typo in struct pcie_link_state PCI: drivers/pci/slot.c should depend on CONFIG_SYSFS PCI: remove redundant __msi_set_enable() PCI PM: consistently use type bool for wake enable variable x86/ACPI: Correct maximum allowed _CRS returned resources and warn if exceeded ...
2009-06-20ACPI: pdc init related memory leak with physical CPU hotplugPallipadi, Venkatesh1-0/+2
arch_acpi_processor_cleanup_pdc() in x86 and ia64 results in memory allocated for _PDC objects that is never freed and will cause memory leak in case of physical CPU remove and add. Patch fixes the memory leak by freeing the objects soon after _PDC is evaluated. Reported-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-20ACPI: pci_root: remove unused dev/fn informationBjorn Helgaas1-16/+9
We never use the PCI device & function number, so remove it to make it clear that it's not needed. Many PCI host bridges don't even appear in config space, so it's meaningless to look at stuff from _ADR, which doesn't exist in that case. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Reviewed-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-20ACPI: pci_root: simplify list traversalsBjorn Helgaas1-14/+9
Using list_for_each_entry() makes traversing the root list easier. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Reviewed-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-20ACPI: pci_root: use driver data rather than list lookupBjorn Helgaas1-17/+4
There's no need to search the list to find the acpi_pci_root structure. We saved it as device->driver_data when we added the device. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-20ACPI: pci_root: simplify acpi_pci_root_add() control flowBjorn Helgaas1-62/+38
By looking up the segment & bus number earlier, we don't have to worry about cleaning up if it fails. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-20ACPI: pci_root: check _CRS, then _BBN for downstream bus numberBjorn Helgaas1-38/+16
To find a host bridge's downstream bus number, we currently look at _BBN first. If _BBN returns a bus number we've already seen, we conclude that _BBN was wrong and look for a bus number in _CRS. However, the spec[1] (figure 5-5 and the example in sec 9.12.1) and an ACPI FAQ[2] suggest that the OS should use _CRS to discover the bus number range, and that _BBN is really intended to bootstrap _CRS methods that reference PCI opregions. This patch makes us always look at _CRS first. If _CRS doesn't supply a bus number, we look at _BBN. If _BBN doesn't exist, we default to zero. This makes the behavior consistent regardless of device discovery order. Previously, if A and B had duplicate _BBNs and we found A first, we'd only look at B's _CRS, whereas if we found B first, we'd only look at A's _CRS. I'm told that Windows discovers host bridge bus numbers using _CRS, so it should be fairly safe to rely on this BIOS functionality. This patch also removes two misleading messages: we printed the "Wrong _BBN value, reboot and use option 'pci=noacpi'" message before looking at _CRS, so we would likely find the bus number in _CRS, the system would work fine, and the user would be confused. The "PCI _CRS %d overrides _BBN 0" message incorrectly assumes _BBN was zero, and it's useless anyway because we print the segment/bus number a few lines later. References: [1] http://www.acpi.info/DOWNLOADS/ACPIspec30b.pdf [2] http://www.acpi.info/acpi_faq.htm _BBN/_CRS discussion http://download.microsoft.com/download/9/8/f/98f3fe47-dfc3-4e74-92a3-088782200fe7/TWAR05005_WinHEC05.ppt (slide 17) http://bugzilla.kernel.org/show_bug.cgi?id=1662 ASUS PR-DLS http://bugzilla.kernel.org/show_bug.cgi?id=1127 ASUS PR-DLSW http://bugzilla.kernel.org/show_bug.cgi?id=1741 ASUS PR-DLS533 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Reviewed-by: Alex Chiang <achiang@hp.com> CC: Shaohua Li <shaohua.li@intel.com> CC: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-19PCI: drivers/pci/slot.c should depend on CONFIG_SYSFSAlex Chiang1-0/+1
There is no way to interact with a physical PCI slot without sysfs, so encode the dependency and prevent this build error: drivers/pci/slot.c: In function 'pci_hp_create_module_link': drivers/pci/slot.c:327: error: 'module_kset' undeclared This patch _should_ make pci-sysfs.o depend on CONFIG_SYSFS too, but we cannot (yet) because the PCI core merrily assumes the existence of sysfs: drivers/built-in.o: In function `pci_bus_add_device': drivers/pci/bus.c:89: undefined reference to `pci_create_sysfs_dev_files' drivers/built-in.o: In function `pci_stop_dev': drivers/pci/remove.c:24: undefined reference to `pci_remove_sysfs_dev_files' So do the minimal bit for now and figure out how to untangle it later. Reported-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Fix-suggested-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-06-18ACPI: idle: rename lapic timer workaround routinesLen Brown1-22/+18
cosmetic only. The lapic_timer workaround routines are specific to the lapic_timer, and are not acpi-generic. old: acpi_timer_check_state() acpi_propagate_timer_broadcast() acpi_state_timer_broadcast() new: lapic_timer_check_state() lapic_timer_propagate_broadcast() lapic_timer_state_broadcast() also, simplify the code in acpi_processor_power_verify() so that lapic_timer_check_state() is simply called from one place for all valid C-states, including C1. Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: battery: fix CONFIG_ACPI_PROCFS_POWER=n build warningLen Brown1-7/+5
drivers/acpi/battery.c:841: warning: label ‘end’ defined but not used Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: use handle, not device, in system notification pathBjorn Helgaas1-15/+15
This patch changes the global system notification path so it uses the acpi_handle, not the acpi_device. System notifications often deal with device presence and status change. In these cases, we may not have an acpi_device. For example, we may get a Device Check notification on an object that previously was not present. Since the object was not present, we would not have had an acpi_device for it. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: remove unused return values from Bus Check & Device Check handlingBjorn Helgaas1-21/+11
Remove return values from acpi_bus_check_device() and acpi_bus_check_scope() since nobody looks at them. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: remove unused "status_changed" return value from Check Device handlingBjorn Helgaas1-19/+3
Remove "status_changed" return from acpi_bus_check_device(). Nobody does anything useful based on its value. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: simplify notification debug messagesBjorn Helgaas1-24/+3
This replaces several messages that depend on the acpi_device struct with a single message that uses just the acpi_handle. We should be able to deal with notifications to objects that do not yet have an acpi_device struct. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: battery: use .notify method instead of installing handler directlyBjorn Helgaas1-17/+5
This patch adds a .notify() method. The presence of .notify() causes Linux/ACPI to manage event handlers and notify handlers on our behalf, so we don't have to install and remove them ourselves. This driver apparently relies on seeing ALL notify events, not just device-specific ones (because it used ACPI_ALL_NOTIFY). We use the ACPI_DRIVER_ALL_NOTIFY_EVENTS driver flag to request all events. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> CC: Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: ac: use .notify method instead of installing handler directlyBjorn Helgaas1-15/+5
This patch adds a .notify() method. The presence of .notify() causes Linux/ACPI to manage event handlers and notify handlers on our behalf, so we don't have to install and remove them ourselves. This driver apparently relies on seeing ALL notify events, not just device-specific ones (because it used ACPI_ALL_NOTIFY). We use the ACPI_DRIVER_ALL_NOTIFY_EVENTS driver flag to request all events. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> CC: Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: allow drivers to request both device and system notify eventsBjorn Helgaas1-1/+5
System notify events (0x00-0x7f) are common across all device types and should be handled in Linux/ACPI, not in drivers. However, some BIOSes use system notify events in device-specific ways that require the driver to be involved. This patch adds a ACPI_DRIVER_ALL_NOTIFY_EVENTS driver flag. When a driver sets this flag and supplies a .notify method, Linux/ACPI calls the .notify method for ALL notify events on the device, not just the device-specific (0x80-0xff) events. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: kill acpi_get_physical_pci_device()Alexander Chiang1-40/+0
acpi_get_pci_dev() is (hopefully) better, and all callers have been converted, so let's get rid of this duplicated functionality. Cc: Thomas Renninger <trenn@suse.de> Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: video: convert to acpi_get_pci_devAlexander Chiang2-7/+8
Now that acpi_get_pci_dev is available, let's use it instead of acpi_get_physical_pci_device() Cc: Thomas Renninger <trenn@suse.de> Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: kill acpi_get_pci_idAlexander Chiang1-71/+0
acpi_get_pci_dev() is better, and all callers have been converted, so eliminate acpi_get_pci_id(). Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: acpi_pci_unbind should clean up properly after acpi_pci_bindAlexander Chiang1-4/+7
In acpi_pci_bind, we set device->ops.bind and device->ops.unbind, but never clear them out. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: simplify acpi_pci_irq_del_prt() APIAlexander Chiang2-5/+5
There is no need to pass a segment/bus tuple to this API, as the callsite always has a struct pci_bus. We can derive segment/bus from the struct pci_bus, so let's take this opportunit to simplify the API and make life easier for the callers. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: simplify acpi_pci_irq_add_prt() APIAlexander Chiang3-11/+10
A PCI domain cannot change as you descend down subordinate buses, which makes the 'segment' argument to acpi_pci_irq_add_prt() useless. Change the interface to take a struct pci_bus *, from whence we can derive the bus number and segment. Reducing the number of arguments makes life simpler for callers. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: eviscerate pci_bind.cAlexander Chiang2-209/+38
Now that we can dynamically convert an ACPI CA handle to a struct pci_dev at runtime, there's no need to statically bind them during boot. acpi_pci_bind/unbind are vastly simplified, and are only used to evaluate _PRT methods on P2P bridges and non-bridge children. This patch also changes the time-space tradeoff ever so slightly. Looking up the ACPI-PCI binding is never in the performance path, and by eliminating this caching, we save 24 bytes for each _ADR device in the ACPI namespace. This patch lays further groundwork to eventually eliminate the acpi_driver_ops.bind callback. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: rearrange acpi_pci_bind/acpi_pci_unbind in pci_bind.cAlexander Chiang1-45/+45
This is a pure code movement patch that does $subject in order to make the following patch easier to read and review. No functional change. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: Introduce acpi_get_pci_dev()Alexander Chiang1-0/+81
Convert an ACPI CA handle to a struct pci_dev. Performing this lookup dynamically allows us to get rid of the ACPI-PCI binding code, which: - eliminates struct acpi_device vs struct pci_dev lifetime issues - lays more groundwork for eliminating .start from acpi_device_ops and thus simplifying ACPI drivers - whacks out a lot of code This change lays the groundwork for eliminating much of pci_bind.c. Although pci_root.c may not be the most logical place for this change, putting it here saves us from having to export acpi_pci_find_root. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: Introduce acpi_is_root_bridge()Alexander Chiang1-0/+24
Returns whether an ACPI CA node is a PCI root bridge or not. This API is generically useful, and shouldn't just be a hotplug function. The implementation becomes much simpler as well. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: make acpi_pci_bind() staticAlexander Chiang2-3/+2
acpi_pci_root_add() explicitly assigns device->ops.bind, and later calls acpi_pci_bind_root(), which also does the same thing. We don't need to repeat ourselves; removing the explicit assignment allows us to make acpi_pci_bind() static. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: clean up whitespace in drivers/acpi/scan.cAlex Chiang1-24/+20
Align labels in column 0, adjust spacing in 'if' statements, eliminate trailing and superfluous whitespaces. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-06-18ACPI: acpi_device_register() should call device_register()Alex Chiang1-3/+2
There is no apparent reason for acpi_device_register() to manually register a new device in two steps (initialize then add). Just call device_register() directly. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
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