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2012-02-16irq_domain/c6x: constify irq_domain structuresGrant Likely
Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Mark Salter <msalter@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2012-02-16irq_domain/c6x: Convert c6x to use generic irq_domain support.Mark Salter
The C6X IRQ support was copied almost verbatim from the PowerPC virtual IRQ code. The PowerPC code was used as the basis for generic irq_domain support, so this patch mostly copies what what done to arch/powerpc by Grant Likely in his irq_domain patch series. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Thomas Gleixner <tglx@linutronix.de>
2012-02-16irq_domain: constify irq_domain_opsGrant Likely
Make irq_domain_ops pointer a constant to make it safer for multiple instances to share the same ops pointer and change the irq_domain code so that it does not modify the ops. v4: Fix mismatched type reference in powerpc code Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Create common xlate functions that device drivers can useGrant Likely
Rather than having each interrupt controller driver creating its own barely unique .xlate function for irq_domain, create a library of translators which any driver can use directly. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Mark Salter <msalter@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Remove irq_domain_add_simple()Grant Likely
irq_domain_add_simple() was a stop-gap measure until complete irq_domain support was complete. This patch removes the irq_domain_add_simple() interface. This patch also drops the explicit irq_domain initialization performed by the mach-versatile code because the versatile interrupt controller already has irq_domain support built into it. This was a bug that was hanging around quietly for a while, but with the full irq_domain which actually verifies that irq_domain ranges are available it would cause the registration to fail and the system wouldn't boot. v4: Fixed number of irqs in mx5 gpio code v2: Updated to pass in host_data pointer on irq_domain allocation. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Cc: Russell King <linux@arm.linux.org.uk> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Remove 'new' irq_domain in favour of the ppc oneGrant Likely
This patch removes the simplistic implementation of irq_domains and enables the powerpc infrastructure for all irq_domain users. The powerpc infrastructure includes support for complex mappings between Linux and hardware irq numbers, and can manage allocation of irq_descs. This patch also converts the few users of irq_domain_add()/irq_domain_del() to call irq_domain_add_legacy() instead. v3: Fix bug that set up too many irqs in translation range. v2: Fix removal of irq_alloc_descs() call in gic driver Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16Subject: [PATCH] mfd: twl-core.c: Fix the number of interrupts managed by ↵Benoit Cousson
twl4030 TWL4030 does handle 3 different interrupts ranges: 8 for the core, 8 for the power events and 18 for the GPIOs. Change the total number of interrupts managed by TWL4030 from 8 to 34. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-02-16of/address: add empty static inlines for !CONFIG_OFGrant Likely
As the title says, this patch adds empty implementations for the address translation functions so that they can be used when CONFIG_OF is disabled. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com>
2012-02-16irq_domain: Add support for base irq and hwirq in legacy mappingsGrant Likely
Add support for a legacy mapping where irq = (hwirq - first_hwirq + first_irq) so that a controller driver can allocate a fixed range of irq_descs and use a simple calculation to translate back and forth between linux and hw irq numbers. This is needed to use an irq_domain with many of the ARM interrupt controller drivers that manage their own irq_desc allocations. Ultimately the goal is to migrate those drivers to use the linear revmap, but doing it this way allows each driver to be converted separately which makes the migration path easier. This patch generalizes the IRQ_DOMAIN_MAP_LEGACY method to use (first_irq-first_hwirq) as the offset between hwirq and linux irq number, and adds checks to make sure that the hwirq number does not exceed range assigned to the controller. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Replace irq_alloc_host() with revmap-specific initializersGrant Likely
Each revmap type has different arguments for setting up the revmap. This patch splits up the generator functions so that each revmap type can do its own setup and the user doesn't need to keep track of how each revmap type handles the arguments. This patch also adds a host_data argument to the generators. There are cases where the host_data pointer will be needed before the function returns. ie. the legacy map calls the .map callback for each irq before returning. v2: - Add void *host_data argument to irq_domain_add_*() functions - fixed failure to compile - Moved IRQ_DOMAIN_MAP_* defines into irqdomain.c Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Remove references to old irq_host namesGrant Likely
No functional changes. Replaces non-exported references to 'host' with domain. Does not change any symbol names referenced by other .c files. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: remove NO_IRQ from irq domain codeGrant Likely
zero always means no irq when using irq domains. Get rid of the NO_IRQ references. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Move irq_domain code from powerpc to kernel/irqGrant Likely
This patch only moves the code. It doesn't make any changes, and the code is still only compiled for powerpc. Follow-on patches will generalize the code for other architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain/powerpc: Eliminate virq_is_host()Grant Likely
There is only one user, and it is trivial to open-code. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain/powerpc: eliminate irq_map; use irq_alloc_desc() insteadGrant Likely
This patch drops the powerpc-specific irq_map table and replaces it with directly using the irq_alloc_desc()/irq_free_desc() interfaces for allocating and freeing irq_desc structures. This patch is a preparation step for generalizing the powerpc-specific virq infrastructure to become irq_domains. As part of this change, the irq_big_lock is changed to a mutex from a raw spinlock. There is no longer any need to use a spin lock since the irq_desc allocation code is now responsible for the critical section of finding an unused range of irq numbers. The radix lookup table is also changed to store the irq_data pointer instead of the irq_map entry since the irq_map is removed. This should end up being functionally equivalent since only allocated irq_descs are ever added to the radix tree. v4: - Fix incorrect access to irq_data structure in debugfs code - Don't ever allocate virq 0 Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain/powerpc: Use common irq_domain structure instead of irq_hostGrant Likely
This patch drops the powerpc-specific irq_host structures and uses the common irq_domain strucutres defined in linux/irqdomain.h. It also fixes all the users to use the new structure names. Renaming irq_host to irq_domain has been discussed for a long time, and this patch is a step in the process of generalizing the powerpc virq code to be usable by all architecture. An astute reader will notice that this patch actually removes the irq_host structure instead of renaming it. This is because the irq_domain structure already exists in include/linux/irqdomain.h and has the needed data members. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: convert microblaze from irq_host to irq_domainGrant Likely
Trivial change, microblaze doesn't use irq remapping yet. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Michal Simek <monstr@monstr.eu> Cc: Thomas Gleixner <tglx@linutronix.de>
2012-02-16irq_domain: Make irq_domain structure match powerpc's irq_hostGrant Likely
Part of the series to unify the irq remapping mechanisms in the kernel. A follow up patch will copy the powerpc implementation into kernel/irq/irqdomain.c, which will be a lot easier if the structures are identical. Where they differ, I've chose to use the powerpc names since there is a lot more code using those names. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: Be less verboseGrant Likely
irq_domain printk's too much. Drop some output. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Thomas Gleixner <tglx@linutronix.de> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16irq_domain: add documentation and MAINTAINERS entry.Grant Likely
Documentation for irq_domain library which will be created in subsequent patches. v4: editorial changes Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Milton Miller <miltonm@bga.com> Tested-by: Olof Johansson <olof@lixom.net>
2012-02-16Get rid of "ERROR: "omap_bus_sync" undefined!" when building modulesAndrey Konovalov
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
2012-02-16arm: omap4: Fix omap_barriers_init for generic ioremap changesAndrey Konovalov
From: Tony Lindgren <tony@atomide.com> Date: Thu, 12 Jan 2012 10:42:57 -0800 Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Commit 73829af71fdb8655e7ba4b5a2a6612ad34a75a11 (Merge branch 'vmalloc' of git://git.linaro.org/people/nico/linux into devel-stable) merged generic ioremap changes. Commit 137d105d50f6e6c373c1aa759f59045e6239cf66 (ARM: OMAP4: Fix errata i688 with MPU interconnect barriers) added a workaround for omap4. In order for the errata to work, we now need the following patch or else we'll get: kernel BUG at mm/vmalloc.c:1134! Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
2012-02-16ARM: exynos4: Add thermal sensor driver platform device supportAmit Daniel Kachhap
This patch adds necessary source definations needed for TMU driver and the platform device support. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org> Conflicts: arch/arm/mach-exynos/Kconfig arch/arm/mach-exynos/Makefile
2012-02-16thermal: exynos4: Register the tmu sensor with the thermal interface layerAmit Daniel Kachhap
Export and register information from the hwmon tmu sensor to the samsung exynos kernel thermal framework where different cooling devices and thermal zone are binded. The exported information is based according to the data structure thermal_sensor_conf present in exynos_thermal.h. HWMON sysfs functions are currently left although all of them are present in generic linux thermal layer. Also the platform data structure is modified to pass frequency cooling in percentages for each thermal level. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-16thermal: exynos: Add thermal interface support for linux thermal layerAmit Daniel Kachhap
This codes uses the generic linux thermal layer and creates a bridge between temperature sensors, linux thermal framework and cooling devices for samsung exynos platform. This layer recieves or monitor the temperature from the sensor and informs the generic thermal layer to take the necessary cooling action. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-16thermal: Add generic cpu cooling implementationAmit Daniel Kachhap
This patch adds support for generic cpu thermal cooling low level implementations using frequency scaling and cpuhotplugg currently. Different cpu related cooling devices can be registered by the user and the binding of these cooling devices to the corresponding trip points can be easily done as the registration API's return the cooling device pointer. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-16thermal: Add a new trip type to use cooling device instance numberAmit Daniel Kachhap
This patch adds a new trip type THERMAL_TRIP_STATE_ACTIVE. This trip behaves same as THERMAL_TRIP_ACTIVE but also passes the cooling device instance number. This helps the cooling device registered as different instances to perform appropriate cooling action decision in the set_cur_state call back function. Also since the trip temperature's are in ascending order so some logic is put in place to skip the un-necessary checks. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-15ARM: exynos: Enable l2 configuration through device treeAmit Daniel Kachhap
This patch enables calling generic l2 setup functions if device tree is used. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-15ARM: exynos: remove useless code to save/restore L2Amit Daniel Kachhap
Following the merge of CPU PM notifiers and L2 resume code, this patch removes useless code to save and restore L2 registers. This is now automatically covered by suspend calls which integrated CPU PM notifiers and new sleep code that allows to resume L2 before MMU is turned on. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-15ARM: exynos: save L2 settings during bootupAmit Daniel Kachhap
This patch adds code to save L2 register configuration at boot, and later used to resume L2 before MMU is enabled in suspend and cpuidle resume paths. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-15ARM: s5p: add L2 early resume codeAmit Daniel Kachhap
This patch adds code to resume L2 before MMU is enabled in suspend and cpuidle resume paths. s3c_cpu_resume is moved to the data section with appropriate comments. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-15ARM: exynos: Add support AFTR mode on EXYNOS4210Amit Daniel Kachhap
This patch adds support AFTR(ARM OFF TOP RUNNING) mode in cpuidle driver. L2 cache keeps their data in this mode. This patch ports the code to the latest interfaces to save/restore CPU state inclusive of CPU PM notifiers, l2 resume and cpu_suspend/resume. Signed-off-by: Jaecheol Lee <jc.lee@samsung.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@linaro.org>
2012-02-14sched: Ensure cpu_power periodic updateVincent Guittot
With a lot of small task, the softirq sched is nearly never called when no_hz is enable. Te load_balance is mainly called with the newly_idle mode which doesn't update the cpu_power. Add a next_update field which ensure a maximum update period when there is short activity Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Conflicts: include/linux/sched.h
2012-02-14ARM: kprobes: work around build errorsArnd Bergmann
I got a few build errors for kprobes playing with randconfig on the latest kernel. While this patch manages to avoid these errors, I'm pretty sure that it is not the ideal solution. The errors I got in arm are while building for ARMv6 with the arm-linux-gnueabihf-gcc-4.6 provided by Linaro, which results in these messages: /tmp/ccGpftnj.s: Assembler messages: /tmp/ccGpftnj.s:22066: Error: selected processor does not support ARM mode `mls r0,r1,r2,r3' /tmp/ccGpftnj.s:22099: Error: selected processor does not support ARM mode `mlshi r7,r8,r9,r10' /tmp/ccGpftnj.s:22128: Error: selected processor does not support ARM mode `mls lr,r1,r2,r13' /tmp/ccGpftnj.s:23781: Error: selected processor does not support ARM mode `strexd r0,r2,r3,[sp]' /tmp/ccGpftnj.s:23802: Error: selected processor does not support ARM mode `ldrexd r2,r3,[sp]' /tmp/ccGpftnj.s:23823: Error: selected processor does not support ARM mode `strexb r0,r2,[sp]' /tmp/ccGpftnj.s:23844: Error: selected processor does not support ARM mode `ldrexb r2,[sp]' /tmp/ccGpftnj.s:23865: Error: selected processor does not support ARM mode `strexh r0,r2,[sp]' /tmp/ccGpftnj.s:23886: Error: selected processor does not support ARM mode `ldrexh r2,[sp]' /tmp/ccGpftnj.s:25836: Warning: base register written back, and overlaps second transfer register [ NP: I didn't reproduce the T2 errors, and Tixy was doubtful about them. Merged Tixy's change suggestions and his ACK. ] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jon Medhurst <tixy@yxit.co.uk> Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
2012-02-14usb: ehci: make HC see up-to-date qh/qtd descriptor ASAPMing Lei
This patch introduces the helper of ehci_sync_mem to flush qtd/qh into memory immediately on some ARM, so that HC can see the up-to-date qtd/qh descriptor asap. This patch fixs one performance bug on ARM Cortex A9 dual core platform, which has been reported on quite a few ARM machines (OMAP4, Tegra 2, snowball...), see details from link of https://bugs.launchpad.net/bugs/709245. The patch has been tested ok on OMAP4 panda A1 board, and the performance of 'dd' over usb mass storage can be increased from 4~5MB/sec to 14~16MB/sec after applying this patch. Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
2012-02-08Linux 3.3-rc3Linus Torvalds
2012-02-08Merge branch 'iommu/fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu One patch fixes an bug in the ARM/MSM IOMMU code which returned sucess in the unmap function even when an error occured and the other patch adds a workaround into the AMD IOMMU driver to better handle broken IVRS ACPI tables (this patch fixes the case when a device is not listed in the table but actually translated by the iommu). * 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: iommu/msm: Fix error handling in msm_iommu_unmap() iommu/amd: Work around broken IVRS tables
2012-02-08Merge branch '3.3-rc-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending This series contains pending target bug-fixes and cleanups for v3.3-rc3 that have been addressed the past weeks in lio-core.git. Some of the highlights include: - Fix handling for control CDBs with data greater than PAGE_SIZE (andy) - Use IP_FREEBIND for iscsi-target to address network portal creation issues with systemd (dax) - Allow PERSISTENT RESERVE IN for non-reservation holder (marco) - Fix iblock se_dev_attrib.unmap_granularity (marco) - Fix unsupported WRITE_SAME sense payload handling (martin) - Add workaround for zero-length control CDB handling (nab) - Fix discovery with INADDR_ANY and IN6ADDR_ANY_INIT (nab) - Fix target_submit_cmd() exception handling (nab) - Return correct ASC for unimplemented VPD pages (roland) - Don't zero pages used for data buffers (roland) - Fix return code of core_tpg_.*_lun (sebastian) * '3.3-rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (26 commits) target: Fix unsupported WRITE_SAME sense payload iscsi: use IP_FREEBIND socket option iblock: fix handling of large requests target: handle empty string writes in sysfs iscsi_target: in_aton needs linux/inet.h target: Fix iblock se_dev_attrib.unmap_granularity target: Fix target_submit_cmd() exception handling target: Change target_submit_cmd() to return void target: accept REQUEST_SENSE with 18bytes target: Fail INQUIRY commands with EVPD==0 but PAGE CODE!=0 target: Return correct ASC for unimplemented VPD pages iscsi-target: Fix discovery with INADDR_ANY and IN6ADDR_ANY_INIT target: Allow control CDBs with data > 1 page iscsi-target: Fix up a few assignments iscsi-target: make one-bit bitfields unsigned iscsi-target: Fix double list_add with iscsit_alloc_buffs reject iscsi-target: Fix reject release handling in iscsit_free_cmd() target: fix return code of core_tpg_.*_lun target: use save/restore lock primitive in core_dec_lacl_count() target: avoid multiple outputs in scsi_dump_inquiry() ...
2012-02-08Merge tag 'md-3.3-fixes' of git://neil.brown.name/mdLinus Torvalds
Some simple md-related fixes. 1/ two small fixes to ensure we handle an interrupted resync properly. 2/ avoid loading the bitmap multiple times in dm-raid * tag 'md-3.3-fixes' of git://neil.brown.name/md: md: two small fixes to handling interrupt resync. Prevent DM RAID from loading bitmap twice.
2012-02-08Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
SPI bug fixes for v3.3-rc2 Minor SPI device driver changes. A rename of the pch_spi_pcidev symbol that merely eliminates a modpost warning, and a Kconfig change to allow the Samsung spi driver to build on EXYNOS. * tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6: spi-topcliff-pch: rename pch_spi_pcidev to pch_spi_pcidev_driver spi: Add spi-s3c64xx driver dependency on ARCH_EXYNOS4
2012-02-08Merge branch 'akpm' (Andrew's tree)Linus Torvalds
Five fixes * branch 'akpm': pcmcia: fix socket refcount decrementing on each resume mm: fix UP THP spin_is_locked BUGs drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmax mm: compaction: check for overlapping nodes during isolation for migration nilfs2: avoid overflowing segment numbers in nilfs_ioctl_clean_segments()
2012-02-08pcmcia: fix socket refcount decrementing on each resumeRussell King
This fixes a memory-corrupting bug: not only does it cause the warning, but as a result of dropping the refcount to zero, it causes the pcmcia_socket0 device structure to be freed while it still has references, causing slab caches corruption. A fatal oops quickly follows this warning - often even just a 'dmesg' following the warning causes the kernel to oops. While testing suspend/resume on an ARM device with PCMCIA support, and a CF card inserted, I found that after five suspend and resumes, the kernel would complain, and shortly die after with slab corruption. WARNING: at include/linux/kref.h:41 kobject_get+0x28/0x50() As the message doesn't give a clue about which kobject, and the built-in debugging in drivers/base/power/main.c happens too late, this was added right before each get_device(): printk("%s: %p [%s] %u\n", __func__, dev, kobject_name(&dev->kobj), atomic_read(&dev->kobj.kref.refcount)); and on the 3rd s2ram cycle, the following behaviour observed: On the 3rd suspend/resume cycle: dpm_prepare: c1a0d998 [pcmcia_socket0] 3 dpm_suspend: c1a0d998 [pcmcia_socket0] 3 dpm_suspend_noirq: c1a0d998 [pcmcia_socket0] 3 dpm_resume_noirq: c1a0d998 [pcmcia_socket0] 3 dpm_resume: c1a0d998 [pcmcia_socket0] 3 dpm_complete: c1a0d998 [pcmcia_socket0] 2 4th: dpm_prepare: c1a0d998 [pcmcia_socket0] 2 dpm_suspend: c1a0d998 [pcmcia_socket0] 2 dpm_suspend_noirq: c1a0d998 [pcmcia_socket0] 2 dpm_resume_noirq: c1a0d998 [pcmcia_socket0] 2 dpm_resume: c1a0d998 [pcmcia_socket0] 2 dpm_complete: c1a0d998 [pcmcia_socket0] 1 5th: dpm_prepare: c1a0d998 [pcmcia_socket0] 1 dpm_suspend: c1a0d998 [pcmcia_socket0] 1 dpm_suspend_noirq: c1a0d998 [pcmcia_socket0] 1 dpm_resume_noirq: c1a0d998 [pcmcia_socket0] 1 dpm_resume: c1a0d998 [pcmcia_socket0] 1 dpm_complete: c1a0d998 [pcmcia_socket0] 0 ------------[ cut here ]------------ WARNING: at include/linux/kref.h:41 kobject_get+0x28/0x50() Modules linked in: ucb1x00_core Backtrace: [<c0212090>] (dump_backtrace+0x0/0x110) from [<c04799dc>] (dump_stack+0x18/0x1c) [<c04799c4>] (dump_stack+0x0/0x1c) from [<c021cba0>] (warn_slowpath_common+0x50/0x68) [<c021cb50>] (warn_slowpath_common+0x0/0x68) from [<c021cbdc>] (warn_slowpath_null+0x24/0x28) [<c021cbb8>] (warn_slowpath_null+0x0/0x28) from [<c0335374>] (kobject_get+0x28/0x50) [<c033534c>] (kobject_get+0x0/0x50) from [<c03804f4>] (get_device+0x1c/0x24) [<c0388c90>] (dpm_complete+0x0/0x1a0) from [<c0389cc0>] (dpm_resume_end+0x1c/0x20) ... Looking at commit 7b24e7988263 ("pcmcia: split up central event handler"), the following change was made to cs.c: return 0; } #endif - - send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); + if (!(skt->state & SOCKET_CARDBUS) && (skt->callback)) + skt->callback->early_resume(skt); return 0; } And the corresponding change in ds.c is from: -static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) -{ - struct pcmcia_socket *s = pcmcia_get_socket(skt); ... - switch (event) { ... - case CS_EVENT_PM_RESUME: - if (verify_cis_cache(skt) != 0) { - dev_dbg(&skt->dev, "cis mismatch - different card\n"); - /* first, remove the card */ - ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); - mutex_lock(&s->ops_mutex); - destroy_cis_cache(skt); - kfree(skt->fake_cis); - skt->fake_cis = NULL; - s->functions = 0; - mutex_unlock(&s->ops_mutex); - /* now, add the new card */ - ds_event(skt, CS_EVENT_CARD_INSERTION, - CS_EVENT_PRI_LOW); - } - break; ... - } - pcmcia_put_socket(s); - return 0; -} /* ds_event */ to: +static int pcmcia_bus_early_resume(struct pcmcia_socket *skt) +{ + if (!verify_cis_cache(skt)) { + pcmcia_put_socket(skt); + return 0; + } + dev_dbg(&skt->dev, "cis mismatch - different card\n"); + /* first, remove the card */ + pcmcia_bus_remove(skt); + mutex_lock(&skt->ops_mutex); + destroy_cis_cache(skt); + kfree(skt->fake_cis); + skt->fake_cis = NULL; + skt->functions = 0; + mutex_unlock(&skt->ops_mutex); + /* now, add the new card */ + pcmcia_bus_add(skt); + return 0; +} As can be seen, the original function called pcmcia_get_socket() and pcmcia_put_socket() around the guts, whereas the replacement code calls pcmcia_put_socket() only in one path. This creates an imbalance in the refcounting. Testing with pcmcia_put_socket() put removed shows that the bug is gone: dpm_suspend: c1a10998 [pcmcia_socket0] 5 dpm_suspend_noirq: c1a10998 [pcmcia_socket0] 5 dpm_resume_noirq: c1a10998 [pcmcia_socket0] 5 dpm_resume: c1a10998 [pcmcia_socket0] 5 dpm_complete: c1a10998 [pcmcia_socket0] 5 Tested-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-08mm: fix UP THP spin_is_locked BUGsHugh Dickins
Fix CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_SMP=n CONFIG_DEBUG_VM=y CONFIG_DEBUG_SPINLOCK=n kernel: spin_is_locked() is then always false, and so triggers some BUGs in Transparent HugePage codepaths. asm-generic/bug.h mentions this problem, and provides a WARN_ON_SMP(x); but being too lazy to add VM_BUG_ON_SMP, BUG_ON_SMP, WARN_ON_SMP_ONCE, VM_WARN_ON_SMP_ONCE, just test NR_CPUS != 1 in the existing VM_BUG_ONs. Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-08drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmaxAxel Lin
In current code, pltfm->als_vmin is set to LM3530_ALS_WINDOW_mV and pltfm->als_vmax is 0. This does not make sense. I think what we want here is setting pltfm->als_vmax to LM3530_ALS_WINDOW_mV. Both als_vmin and als_vmax local variables will be set to pltfm->als_vmin and pltfm->als_vmax by a few lines latter. Thus also remove a redundant assignment for als_vmin and als_vmax in this patch. Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com> Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com> Tested-by: Milo(Woogyom) Kim <milo.kim@ti.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-08mm: compaction: check for overlapping nodes during isolation for migrationMel Gorman
When isolating pages for migration, migration starts at the start of a zone while the free scanner starts at the end of the zone. Migration avoids entering a new zone by never going beyond the free scanned. Unfortunately, in very rare cases nodes can overlap. When this happens, migration isolates pages without the LRU lock held, corrupting lists which will trigger errors in reclaim or during page free such as in the following oops BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 IP: [<ffffffff810f795c>] free_pcppages_bulk+0xcc/0x450 PGD 1dda554067 PUD 1e1cb58067 PMD 0 Oops: 0000 [#1] SMP CPU 37 Pid: 17088, comm: memcg_process_s Tainted: G X RIP: free_pcppages_bulk+0xcc/0x450 Process memcg_process_s (pid: 17088, threadinfo ffff881c2926e000, task ffff881c2926c0c0) Call Trace: free_hot_cold_page+0x17e/0x1f0 __pagevec_free+0x90/0xb0 release_pages+0x22a/0x260 pagevec_lru_move_fn+0xf3/0x110 putback_lru_page+0x66/0xe0 unmap_and_move+0x156/0x180 migrate_pages+0x9e/0x1b0 compact_zone+0x1f3/0x2f0 compact_zone_order+0xa2/0xe0 try_to_compact_pages+0xdf/0x110 __alloc_pages_direct_compact+0xee/0x1c0 __alloc_pages_slowpath+0x370/0x830 __alloc_pages_nodemask+0x1b1/0x1c0 alloc_pages_vma+0x9b/0x160 do_huge_pmd_anonymous_page+0x160/0x270 do_page_fault+0x207/0x4c0 page_fault+0x25/0x30 The "X" in the taint flag means that external modules were loaded but but is unrelated to the bug triggering. The real problem was because the PFN layout looks like this Zone PFN ranges: DMA 0x00000010 -> 0x00001000 DMA32 0x00001000 -> 0x00100000 Normal 0x00100000 -> 0x01e80000 Movable zone start PFN for each node early_node_map[14] active PFN ranges 0: 0x00000010 -> 0x0000009b 0: 0x00000100 -> 0x0007a1ec 0: 0x0007a354 -> 0x0007a379 0: 0x0007f7ff -> 0x0007f800 0: 0x00100000 -> 0x00680000 1: 0x00680000 -> 0x00e80000 0: 0x00e80000 -> 0x01080000 1: 0x01080000 -> 0x01280000 0: 0x01280000 -> 0x01480000 1: 0x01480000 -> 0x01680000 0: 0x01680000 -> 0x01880000 1: 0x01880000 -> 0x01a80000 0: 0x01a80000 -> 0x01c80000 1: 0x01c80000 -> 0x01e80000 The fix is straight-forward. isolate_migratepages() has to make a similar check to isolate_freepage to ensure that it never isolates pages from a zone it does not hold the LRU lock for. This was discovered in a 3.0-based kernel but it affects 3.1.x, 3.2.x and current mainline. Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Michal Nazarewicz <mina86@mina86.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-08nilfs2: avoid overflowing segment numbers in nilfs_ioctl_clean_segments()Xi Wang
nsegs is read from userspace. Limit its value and avoid overflowing nsegs * sizeof(__u64) in the subsequent call to memdup_user(). This patch complements 481fe17e973fb9 ("nilfs2: potential integer overflow in nilfs_ioctl_clean_segments()"). Signed-off-by: Xi Wang <xi.wang@gmail.com> Cc: Haogang Chen <haogangchen@gmail.com> Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-02-08Merge tag 'sound-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound sound fixes #2 for 3.3-rc3 A collection of small fixes, mostly for regressions. In addition, a few ASoC wm8994 updates are included, too. * tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ASoC: wm8994: Disable line output discharge prior to ramping VMID ASoC: wm8994: Fix typo in VMID ramp setting ALSA: oxygen, virtuoso: fix exchanged L/R volumes of aux and CD inputs ALSA: usb-audio: add Edirol UM-3G support ALSA: hda - add support for Uniwill ECS M31EI notebook ALSA: hda - Fix error handling in patch_ca0132.c ASoC: wm8994: Enabling VMID should take a runtime PM reference ALSA: hda/realtek - Fix a wrong condition ALSA: emu8000: Remove duplicate linux/moduleparam.h include from emu8000_patch.c ALSA: hda/realtek - Add missing Bass and CLFE as vmaster slaves ASoC: wm_hubs: Correct line input to line output 2 paths ASoC: cs42l73: Fix Output [X|A|V]SP_SCLK Sourcing Mode setting for master mode ASoC: wm8962: Fix word length configuration ASoC: core: Better support for idle_bias_off suspend ignores ASoC: wm8994: Remove ASoC level register cache sync ASoC: wm_hubs: Fix routing of input PGAs to line output mixer
2012-02-08Merge tag 'asoc-3.3' of ↵Takashi Iwai
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus A few small WM8994 updates to go on top of the previous lot of things that were sent. They collide with some -next work so I'd really like to get them into 3.3-rc3 if possible to merge back up into the -next code. All driver specific and unexciting in the grand scheme of things.
2012-02-08ASoC: wm8994: Disable line output discharge prior to ramping VMIDMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-02-08ASoC: wm8994: Fix typo in VMID ramp settingMark Brown
The VMID ramp rate is supposed to be 0x3, not 11b. Fix that. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org