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path: root/drivers/of/platform.c
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2013-01-09of: add missing documentation for of_platform_populate()Javi Merino
15c3597d (dt/platform: allow device name to be overridden) added a lookup parameter to of_platform_populate() but did not update the documentation. This patch adds the missing documentation entry. Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Jiri Kosina <trivial@kernel.org> Signed-off-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-10-17of/platform: sparse fixKim Phillips
drivers/of/platform.c:110:59: warning: incorrect type in argument 2 (different base types) drivers/of/platform.c:110:59: expected restricted __be32 const [usertype] *addr drivers/of/platform.c:110:59: got unsigned int const [usertype] *[assigned] reg Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-08-03of: Allow busses with #size-cells=0Stephen Warren
It's quite legitimate for a DT node to specify #size-cells=0. One example is a node that's used to collect a number of non-memory-mapped devices. In that scenario, there may be multiple child nodes with the same name (type) thus necessitating the use of unit addresses in node names, and reg properties: / { regulators { compatible = "simple-bus"; #address-cells = <1>; #size-cells = <0>; regulator@0 { compatible = "regulator-fixed"; reg = <0>; ... }; regulator@1 { compatible = "regulator-fixed"; reg = <1>; ... }; ... }; }; However, #size-cells=0 prevents translation of reg property values into the parent node's address space. In turn, this triggers the kernel to emit error messages during boot, such as: prom_parse: Bad cell count for /regulators/regulator@0 To prevent printing these error messages for legitimate DT content, a number of changes are made: 1) of_get_address()/of_get_pci_address() are modified only to validate the value of #address-cells, and not #size-cells. 2) of_can_translate_address() is added to indicate whether address translation is possible. 3) of_device_make_bus_id() is modified to name devices based on the translated address only where possible, and otherwise fall back to using the (first cell of the) raw untranslated address. 4) of_device_alloc() is modified to create memory resources for a device only if the address can be translated into the CPU's address space. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-07-11Merge tag 'fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Arnd Bergmann: - multiple omap2+ bug fixes - a regression on ux500 dt support - a build failure on shmobile * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: OMAP2+: omap2plus_defconfig: EHCI driver is not stable, disable it ARM: shmobile: fix platsmp.c build when ARCH_SH73A0=n ARM: ux500: Over-ride the DT device naming scheme for pinctrl ARM: ux500: Fix build errors/warnings when MACH_UX500_DT is not set of: address: Don't fail a lookup just because a node has no reg property ARM: OMAP2+: hwmod code/clockdomain data: fix 32K sync timer
2012-07-06of: address: Don't fail a lookup just because a node has no reg propertyLee Jones
Sometimes it doesn't make any sense for a node to have an address. In this case device lookup will always be unsuccessful because we currently assume every node will have a reg property. This patch changes the semantics so that the resource address and the lookup address will only be compared if one exists. Things like AUXDATA() rely on of_dev_lookup to return the lookup entry of a particular device in order to do things like apply platform_data to a device. However, this is currently broken for nodes which do not have a reg property, meaning that platform_data can not be passed in those cases. Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2012-06-13of: export of_platform_populate()Stephen Warren
Without this, modules can't use this API, leading to build failures. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2012-03-23Merge branch 'for-armsoc' of git://git.linaro.org/people/rmk/linux-armLinus Torvalds
Pull #1 ARM updates from Russell King: "This one covers stuff which Arnd is waiting for me to push, as this is shared between both our trees and probably other trees elsewhere. Essentially, this contains: - AMBA primecell device initializer updates - mostly shrinking the size of the device declarations in platform code to something more reasonable. - Getting rid of the NO_IRQ crap from AMBA primecell stuff. - Nicolas' idle cleanups. This in combination with the restart cleanups from the last merge window results in a great many mach/system.h files being deleted." Yay: ~80 files, ~2000 lines deleted. * 'for-armsoc' of git://git.linaro.org/people/rmk/linux-arm: (60 commits) ARM: remove disable_fiq and arch_ret_to_user macros ARM: make entry-macro.S depend on !MULTI_IRQ_HANDLER ARM: rpc: make default fiq handler run-time installed ARM: make arch_ret_to_user macro optional ARM: amba: samsung: use common amba device initializers ARM: amba: spear: use common amba device initializers ARM: amba: nomadik: use common amba device initializers ARM: amba: u300: use common amba device initializers ARM: amba: lpc32xx: use common amba device initializers ARM: amba: netx: use common amba device initializers ARM: amba: bcmring: use common amba device initializers ARM: amba: ep93xx: use common amba device initializers ARM: amba: omap2: use common amba device initializers ARM: amba: integrator: use common amba device initializers ARM: amba: realview: get rid of private platform amba_device initializer ARM: amba: versatile: get rid of private platform amba_device initializer ARM: amba: vexpress: get rid of private platform amba_device initializer ARM: amba: provide common initializers for static amba devices ARM: amba: make use of -1 IRQs warn ARM: amba: u300: get rid of NO_IRQ initializers ...
2012-02-26devicetree: Add empty of_platform_populate() for !CONFIG_OF_ADDRESS (sparc)Grant Likely
Sparc has its own helpers for translating address ranges when the device tree is parsed at boot time, and it isn't able to use of_platform_populate(). However, there are some device drivers that want to use that function on other DT enabled platforms (ie. TWL4030). This patch adds an empty of_platform_populate() implementation that returns an error when CONFIG_OF_ADDRESS is not selected. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benoit Cousson <b-cousson@ti.com> Cc: Samuel Ortiz <sameo@linux.intel.com>
2012-01-25ARM: amba: of: convert to use amba_device_allocRussell King
Convert DT code to use the new amba_device_alloc APIs. Acked-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-12dt/device: Fix auxdata matching to handle entries without a name overrideGrant Likely
There is no requirement to override name entries in auxdata. Fix the entry matching to use .compatible instead of .name to find the end of the list. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-11-03dt/platform: minor cleanupOlof Johansson
* Correct description of of_platform_bus_create to match implementation * Remove a level of indentation in of_dev_lookup Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2011-07-25Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (99 commits) drivers/virt: add missing linux/interrupt.h to fsl_hypervisor.c powerpc/85xx: fix mpic configuration in CAMP mode powerpc: Copy back TIF flags on return from softirq stack powerpc/64: Make server perfmon only built on ppc64 server devices powerpc/pseries: Fix hvc_vio.c build due to recent changes powerpc: Exporting boot_cpuid_phys powerpc: Add CFAR to oops output hvc_console: Add kdb support powerpc/pseries: Fix hvterm_raw_get_chars to accept < 16 chars, fixing xmon powerpc/irq: Quieten irq mapping printks powerpc: Enable lockup and hung task detectors in pseries and ppc64 defeconfigs powerpc: Add mpt2sas driver to pseries and ppc64 defconfig powerpc: Disable IRQs off tracer in ppc64 defconfig powerpc: Sync pseries and ppc64 defconfigs powerpc/pseries/hvconsole: Fix dropped console output hvc_console: Improve tty/console put_chars handling powerpc/kdump: Fix timeout in crash_kexec_wait_realmode powerpc/mm: Fix output of total_ram. powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards powerpc: Correct annotations of pmu registration functions ... Fix up trivial Kconfig/Makefile conflicts in arch/powerpc, drivers, and drivers/cpufreq
2011-07-08powerpc: implement arch_setup_pdev_archdataKumar Gala
We have a long standing issues with platform devices not have a valid dma_mask pointer. This hasn't been an issue to date as no platform device has tried to set its dma_mask value to a non-default value. Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2011-06-21dt/platform: allow device name to be overriddenGrant Likely
Some platform code has specific requirements on the naming of devices. This patch allows callers of of_platform_populate() to provide a device name lookup table. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-21drivers/amba: create devices from device treeGrant Likely
Add a function to create amba_devices (i.e. primecell peripherals) from device tree nodes. The device tree scanning is done by the of_platform_populate() function which can call of_amba_device_create based on a match table entry. Nodes with a "arm,primecell-periphid" property can override the h/w peripheral id value. Based on the original work by Jeremy Kerr. Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Rob Herring <rob.herring@calxeda.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> [grant.likely: add Jeremy's original s-o-b line, changes from review comments, and moved all code to drivers/of/platform.c] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-21dt: add of_platform_populate() for creating device from the device treeGrant Likely
of_platform_populate() is similar to of_platform_bus_probe() except that it strictly enforces that all device nodes must have a compatible property, and it can be used to register devices (not buses) which are children of the root node. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-21dt: Add default match table for bus idsGrant Likely
No need for most platforms to define their own bus table when calling of_platform_populate(). Supply a stock one. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-23dt: eliminate OF_NO_DEEP_PROBE and test for NULL match tableGrant Likely
There are no users of OF_NO_DEEP_PROBE, and of_match_node() now gracefully handles being passed a NULL pointer, so the checks at the top of of_platform_bus_probe can be dropped. While at it, consolidate the root node pointer check to be easier to read and tidy up related comments. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-23dt: Refactor of_platform_bus_probe()Grant Likely
The current implementation uses three copies of of basically identical code. This patch consolidates them to make the code simpler. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-01dt: eliminate of_platform_driver shim codeGrant Likely
Commit eca393016, "of: Merge of_platform_bus_type with platform_bus_type" added a shim to allow of_platform_drivers to get registers onto the platform bus so that there was time to migrate the existing drivers to the platform_bus_type. This patch removes the shim since there are no more users of the old interface. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-28dt/powerpc: move of_bus_type infrastructure to ibmebusGrant Likely
arch/powerpc/kernel/ibmebus.c is the only remaining user of the of_bus_type support code for initializing the bus and registering drivers. All others have either been switched to the vanilla platform bus or already have their own infrastructure. This patch moves the functionality that ibmebus is using out of drivers/of/{platform,device}.c and into ibmebus.c where it is actually used. Also renames the moved symbols from of_platform_* to ibmebus_bus_* to reflect the actual usage. This patch is part of moving all of the of_platform_bus_type users over to the platform_bus_type. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-03of/device: Don't register disabled devicesGrant Likely
Device nodes with the property status="disabled" are not usable and so don't register them when parsing the device tree for devices. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Hollis Blanchard <hollis_blanchard@mentor.com> Cc: Deepak Saxena <deepak_saxena@mentor.com> Cc: Scott Wood <scottwood@freescale.com>, Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-10-21of/device: Rework to use common platform_device_alloc() for allocating devicesGrant Likely
The current code allocates and manages platform_devices created from the device tree manually. It also uses an unsafe shortcut for allocating the platform_device and the resource table at the same time. (which I added in the last rework; sorry). This patch refactors the code to use platform_device_alloc() for allocating new devices. This reduces the amount of custom code implemented by of_platform, eliminates the unsafe alloc trick, and has the side benefit of letting the platform_bus code manage freeing the device data and resources when the device is freed. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Michal Simek <monstr@monstr.eu>
2010-10-12of/irq: remove references to NO_IRQ in drivers/of/platform.cAndres Salomon
Instead of referencing NO_IRQ in platform.c, define some helper functions in irq.c to call instead from platform.c. Keep NO_IRQ usage local to irq.c, and define NO_IRQ if not defined in headers. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-08-01of/platform: Register of_platform_drivers with an "of:" prefixGrant Likely
Currently there are some drivers in tree which register both a platform_driver and an of_platform_driver with the same name. This is a temporary situation until all the relevant of_platform_drivers are converted to be normal platform_drivers. Until then, this patch gives all the of_platform_drivers an "of:" prefix to protect against bogus matches and namespace conflicts.
2010-07-30of/device: Make of_device_make_bus_id() usable by other code.Grant Likely
The AMBA bus should also use of_device_make_bus_id() when populating device out of device tree data. This patch makes the function non-static, and adds a suitable prototype in of_device.h Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of: remove of_default_bus_idsJonas Bonn
This list used was by only two platforms with all other platforms defining an own list of valid bus id's to pass to of_platform_bus_probe. This patch: i) copies the default list to the two platforms that depended on it (powerpc) ii) remove the usage of of_default_bus_ids in of_platform_bus_probe iii) removes the definition of the list from all architectures that defined it Passing a NULL 'matches' parameter to of_platform_bus_probe is still valid; the function returns no error in that case as the NULL value is equivalent to an empty list. Signed-off-by: Jonas Bonn <jonas@southpole.se> [grant.likely@secretlab.ca: added __initdata annotations, warn on and return error on missing match table, and fix whitespace errors] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of: make of_find_device_by_node genericJonas Bonn
There's no need for this function to be architecture specific and all four architectures defining it had the same definition. The function has been moved to drivers/of/platform.c. Signed-off-by: Jonas Bonn <jonas@southpole.se> [grant.likely@secretlab.ca: moved to drivers/of/platform.c, simplified code, and added kerneldoc comment] Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net>
2010-07-24of/device: Replace of_device with platform_device in includes and core codeGrant Likely
of_device is currently just an #define alias to platform_device until it gets removed entirely. This patch removes references to it from the include directories and the core drivers/of code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net>
2010-07-24of/device: Protect against binding of_platform_drivers to non-OF devicesGrant Likely
There is an unlikely chance of this situation is occurring, but it is easy to protect against. If a matching entry cannot be found in the of_match_table, then don't bind the driver. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-24of: Merge of_platform_bus_type with platform_bus_typeGrant Likely
of_platform_bus was being used in the same manner as the platform_bus. The only difference being that of_platform_bus devices are generated from data in the device tree, and platform_bus devices are usually statically allocated in platform code. Having them separate causes the problem of device drivers having to be registered twice if it was possible for the same device to appear on either bus. This patch removes of_platform_bus_type and registers all of_platform bus devices and drivers on the platform bus instead. A previous patch made the of_device structure an alias for the platform_device structure, and a shim is used to adapt of_platform_drivers to the platform bus. After all of of_platform_bus drivers are converted to be normal platform drivers, the shim code can be removed. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net>
2010-07-18of/device: Fix build errors for non-ppc and non-microblazeGrant Likely
Only powerpc and microblaze supply (struct device *)->archdata.dma_mask. This patch stops referencing it on other architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-18of/flattree: Fix crash when device tree absentGrant Likely
This patch fixes the condition where device tree support is compiled in, but no device tree was proved by firmware. It makes of_platform_bus_probe() explicitly check for a NULL device tree pointer. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-14drivers/of: fix build error when CONFIG_PPC_DCR is setGrant Likely
Commit 94c0931983ee9d1cd96c32d52ac64c17464f0bbd (of: Merge of_device_alloc() and of_device_make_bus_id()) moved code that does calls a dcr routine without including the correct header which causes the following build error on some powerpc configurations: drivers/of/platform.c: In function 'of_device_make_bus_id': drivers/of/platform.c:437: error: implicit declaration of function 'of_translate_dcr_address' This patch adds the appropriate header to drivers/of/platform.c Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of: Fix missing includeGrant Likely
Fix a build failure on ARM Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-05of/device: populate platform_device (of_device) resource table on allocationGrant Likely
When allocating a platform_device to represent an OF node, also allocate space for the resource table and populate it with IRQ and reg property information. This change is in preparation for merging the of_platform_bus_type with the platform_bus_type so that existing platform_driver code can retrieve base addresses and IRQs data. Background: a previous commit removed struct of_device and made it a #define alias for platform_device. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Grant Likely <grant.likely@secretlab.ca> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: microblaze-uclinux@itee.uq.edu.au CC: linuxppc-dev@ozlabs.org CC: devicetree-discuss@lists.ozlabs.org
2010-07-05of: Merge of_device_alloc() and of_device_make_bus_id()Grant Likely
This patch merges the common routines of_device_alloc() and of_device_make_bus_id() from powerpc and microblaze. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Grant Likely <grant.likely@secretlab.ca> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: microblaze-uclinux@itee.uq.edu.au CC: linuxppc-dev@ozlabs.org CC: devicetree-discuss@lists.ozlabs.org
2010-07-05of/device: Merge of_platform_bus_probe()Grant Likely
Merge common code between PowerPC and microblaze. This patch merges the code that scans the tree and registers devices. The functions merged are of_platform_bus_probe(), of_platform_bus_create(), and of_platform_device_create(). This patch also move the of_default_bus_ids[] table out of a Microblaze header file and makes it non-static. The device ids table isn't merged because powerpc and microblaze use different default data. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Michal Simek <monstr@monstr.eu> CC: Grant Likely <grant.likely@secretlab.ca> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Stephen Rothwell <sfr@canb.auug.org.au> CC: microblaze-uclinux@itee.uq.edu.au CC: linuxppc-dev@ozlabs.org
2010-05-22of: change of_match_device to work with struct deviceGrant Likely
The of_node pointer is now stored directly in struct device, so of_match_device() should work with any device, not just struct of_device. This patch changes the interface to of_match_device() to accept a struct device instead of struct of_device. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-05-22of: Remove duplicate fields from of_platform_driverGrant Likely
.name, .match_table and .owner are duplicated in both of_platform_driver and device_driver. This patch is a removes the extra copies from struct of_platform_driver and converts all users to the device_driver members. This patch is a pretty mechanical change. The usage model doesn't change and if any drivers have been missed, or if anything has been fixed up incorrectly, then it will fail with a compile time error, and the fixup will be trivial. This patch looks big and scary because it touches so many files, but it should be pretty safe. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Sean MacLennan <smaclennan@pikatech.com>
2010-05-22drivercore: Add of_match_table to the common device driversGrant Likely
OF-style matching can be available to any device, on any type of bus. This patch allows any driver to provide an OF match table when CONFIG_OF is enabled so that drivers can be bound against devices described in the device tree. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-10-30of/platform: Implement support for dev_pm_opsAnton Vorontsov
Linux power management subsystem supports vast amount of new PM callbacks that are crucial for proper suspend and hibernation support in drivers. This patch implements support for dev_pm_ops, preserving support for legacy callbacks. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-05-14[POWERPC] Create modalias file in sysfs for of_platform busOlaf Hering
Create /sys/bus/of_platform/devices/*/modalias file to allow autoloading of modules. Modalias files are already present for many other bus types. This adds also a newline to the devspec files. Also create a devspec file for mac-io devices. They were created as a side effect. Use correct buffer size for mac-io modalias buffer. Tested on iBook1 and Efika. Signed-off-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-02-06[POWERPC] Create and hook up of_platform_device_shutdownMichael Ellerman
Although of_platform_device's can have a shutdown routine, at the moment the bus code doesn't actually call it. So add the required glue to hook the shutdown routine. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-10-17[SPARC/64]: Consolidate of_register_driverStephen Rothwell
Also of_unregister_driver. These will be shortly also used by the PowerPC code. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-20Create drivers/of/platform.cStephen Rothwell
and populate it with the common parts from PowerPC and Sparc[64]. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Paul Mackerras <paulus@samba.org> Acked-by: David S. Miller <davem@davemloft.net>