- 12 Jun, 2015 1 commit
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David Woodhouse authored
Although the extended tables are theoretically a completely orthogonal feature to PASID and anything else that *uses* the newly-available bits, some of the early hardware has problems even when all we do is enable them and use only the same bits that were in the old context tables. For now, there's no motivation to support extended tables unless we're going to use PASID support to do SVM. So just don't use them unless PASID support is advertised too. Also add a command-line bailout just in case later chips also have issues. The equivalent problem for PASID support has already been fixed with the upcoming VT-d spec update and commit bd00c606 ("iommu/vt-d: Change PASID support to bit 40 of Extended Capability Register"), because the problematic platforms use the old definition of the PASID-capable bit, which is now marked as reserved and meaningless. So with this change, we'll magically start using ECS again only when we see the new hardware advertising "hey, we have PASID support and we actually tested it this time" on bit 40. The VT-d hardware architect has promised that we are not going to have any reason to support ECS *without* PASID any time soon, and he'll make sure he checks with us before changing that. In the future, if hypothetical new features also use new bits in the context tables and can be seen on implementations *without* PASID support, we might need to add their feature bits to the ecs_enabled() macro. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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- 09 Jun, 2015 1 commit
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David Woodhouse authored
The existing hardware implementations with PASID support advertised in bit 28? Forget them. They do not exist. Bit 28 means nothing. When we have something that works, it'll use bit 40. Do not attempt to infer anything meaningful from bit 28. This will be reflected in an updated VT-d spec in the extremely near future. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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- 11 May, 2015 1 commit
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David Woodhouse authored
When we use 'intel_iommu=igfx_off' to disable translation for the graphics, and when we discover that the BIOS has misconfigured the DMAR setup for I/OAT, we use a special DUMMY_DEVICE_DOMAIN_INFO value in dev->archdata.iommu to indicate that translation is disabled. With passthrough mode, we were attempting to dereference that as a normal pointer to a struct device_domain_info when setting up an identity mapping for the affected device. This fixes the problem by making device_to_iommu() explicitly check for the special value and indicate that no IOMMU was found to handle the devices in question. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Cc: stable@vger.kernel.org (which means you can pick up 18436afd now too)
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- 27 Apr, 2015 9 commits
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Linus Torvalds authored
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Andy Lutomirski authored
AMD CPUs don't reinitialize the SS descriptor on SYSRET, so SYSRET with SS == 0 results in an invalid usermode state in which SS is apparently equal to __USER_DS but causes #SS if used. Work around the issue by setting SS to __KERNEL_DS __switch_to, thus ensuring that SYSRET never happens with SS set to NULL. This was exposed by a recent vDSO cleanup. Fixes: e7d6eefa x86/vdso32/syscall.S: Do not load __USER32_DS to %ss Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Peter Anvin <hpa@zytor.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <vda.linux@googlemail.com> Cc: Brian Gerst <brgerst@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull intel drm fixes from Dave Airlie. * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: drm/i915: vlv: fix save/restore of GFX_MAX_REQ_COUNT reg drm/i915: Workaround to avoid lite restore with HEAD==TAIL drm/i915: cope with large i2c transfers
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git://git.infradead.org/intel-iommuLinus Torvalds authored
Pull intel iommu updates from David Woodhouse: "This lays a little of the groundwork for upcoming Shared Virtual Memory support — fixing some bogus #defines for capability bits and adding the new ones, and starting to use the new wider page tables where we can, in anticipation of actually filling in the new fields therein. It also allows graphics devices to be assigned to VM guests again. This got broken in 3.17 by disallowing assignment of RMRR-afflicted devices. Like USB, we do understand why there's an RMRR for graphics devices — and unlike USB, it's actually sane. So we can make an exception for graphics devices, just as we do USB controllers. Finally, tone down the warning about the X2APIC_OPT_OUT bit, due to persistent requests. X2APIC_OPT_OUT was added to the spec as a nasty hack to allow broken BIOSes to forbid us from using X2APIC when they do stupid and invasive things and would break if we did. Someone noticed that since Windows doesn't have full IOMMU support for DMA protection, setting the X2APIC_OPT_OUT bit made Windows avoid initialising the IOMMU on the graphics unit altogether. This means that it would be available for use in "driver mode", where the IOMMU registers are made available through a BAR of the graphics device and the graphics driver can do SVM all for itself. So they started setting the X2APIC_OPT_OUT bit on *all* platforms with SVM capabilities. And even the platforms which *might*, if the planets had been aligned correctly, possibly have had SVM capability but which in practice actually don't" * git://git.infradead.org/intel-iommu: iommu/vt-d: support extended root and context entries iommu/vt-d: Add new extended capabilities from v2.3 VT-d specification iommu/vt-d: Allow RMRR on graphics devices too iommu/vt-d: Print x2apic opt out info instead of printing a warning iommu/vt-d: kill bogus ecap_niotlb_iunits()
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull i2c fixes from Wolfram Sang: "This has a mixture of merge window cleanups and bugfixes" * 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: st: add include for pinctrl i2c: mux: use proper dev when removing "channel-X" symlinks i2c: digicolor: remove duplicate include i2c: Mark adapter devices with pm_runtime_no_callbacks i2c: pca-platform: fix broken email address i2c: mxs: fix broken email address i2c: rk3x: report number of messages transmitted
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfsLinus Torvalds authored
Pull btrfs fixes from Chris Mason: "Filipe hit two problems in my block group cache patches. We finalized the fixes last week and ran through more tests" * 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: prevent list corruption during free space cache processing Btrfs: fix inode cache writeout
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Dave Airlie authored
Merge tag 'drm-intel-next-fixes-2015-04-25' of git://anongit.freedesktop.org/drm-intel into drm-fixes three fixes for i915. * tag 'drm-intel-next-fixes-2015-04-25' of git://anongit.freedesktop.org/drm-intel: drm/i915: vlv: fix save/restore of GFX_MAX_REQ_COUNT reg drm/i915: Workaround to avoid lite restore with HEAD==TAIL drm/i915: cope with large i2c transfers
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git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds authored
Pull NFS client updates from Trond Myklebust: "Another set of mainly bugfixes and a couple of cleanups. No new functionality in this round. Highlights include: Stable patches: - Fix a regression in /proc/self/mountstats - Fix the pNFS flexfiles O_DIRECT support - Fix high load average due to callback thread sleeping Bugfixes: - Various patches to fix the pNFS layoutcommit support - Do not cache pNFS deviceids unless server notifications are enabled - Fix a SUNRPC transport reconnection regression - make debugfs file creation failure non-fatal in SUNRPC - Another fix for circular directory warnings on NFSv4 "junctioned" mountpoints - Fix locking around NFSv4.2 fallocate() support - Truncating NFSv4 file opens should also sync O_DIRECT writes - Prevent infinite loop in rpcrdma_ep_create() Features: - Various improvements to the RDMA transport code's handling of memory registration - Various code cleanups" * tag 'nfs-for-4.1-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (55 commits) fs/nfs: fix new compiler warning about boolean in switch nfs: Remove unneeded casts in nfs NFS: Don't attempt to decode missing directory entries Revert "nfs: replace nfs_add_stats with nfs_inc_stats when add one" NFS: Rename idmap.c to nfs4idmap.c NFS: Move nfs_idmap.h into fs/nfs/ NFS: Remove CONFIG_NFS_V4 checks from nfs_idmap.h NFS: Add a stub for GETDEVICELIST nfs: remove WARN_ON_ONCE from nfs_direct_good_bytes nfs: fix DIO good bytes calculation nfs: Fetch MOUNTED_ON_FILEID when updating an inode sunrpc: make debugfs file creation failure non-fatal nfs: fix high load average due to callback thread sleeping NFS: Reduce time spent holding the i_mutex during fallocate() NFS: Don't zap caches on fallocate() xprtrdma: Make rpcrdma_{un}map_one() into inline functions xprtrdma: Handle non-SEND completions via a callout xprtrdma: Add "open" memreg op xprtrdma: Add "destroy MRs" memreg op xprtrdma: Add "reset MRs" memreg op ...
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull fourth vfs update from Al Viro: "d_inode() annotations from David Howells (sat in for-next since before the beginning of merge window) + four assorted fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: RCU pathwalk breakage when running into a symlink overmounting something fix I_DIO_WAKEUP definition direct-io: only inc/dec inode->i_dio_count for file systems fs/9p: fix readdir() VFS: assorted d_backing_inode() annotations VFS: fs/inode.c helpers: d_inode() annotations VFS: fs/cachefiles: d_backing_inode() annotations VFS: fs library helpers: d_inode() annotations VFS: assorted weird filesystems: d_inode() annotations VFS: normal filesystems (and lustre): d_inode() annotations VFS: security/: d_inode() annotations VFS: security/: d_backing_inode() annotations VFS: net/: d_inode() annotations VFS: net/unix: d_backing_inode() annotations VFS: kernel/: d_inode() annotations VFS: audit: d_backing_inode() annotations VFS: Fix up some ->d_inode accesses in the chelsio driver VFS: Cachefiles should perform fs modifications on the top layer only VFS: AF_UNIX sockets should call mknod on the top layer only
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- 26 Apr, 2015 8 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
Pull more power management and ACPI updates from Rafael Wysocki: "These are fixes mostly (intel_pstate, ACPI core, ACPI EC driver, cpupower tool), a new CPU ID for the Intel RAPL driver and one intel_pstate driver improvement that didn't make it to my previous pull requests due to timing. Specifics: - Fix a build warning in the intel_pstate driver showing up in non-SMP builds (Borislav Petkov) - Change one of the intel_pstate's P-state selection parameters for Baytrail and Cherrytrail CPUs to significantly improve performance at the cost of a small increase in energy consumption (Kristen Carlson Accardi) - Fix a NULL pointer dereference in the ACPI EC driver due to an unsafe list walk in the query handler removal routine (Chris Bainbridge) - Get rid of a false-positive lockdep warning in the ACPI container hot-remove code (Rafael J Wysocki) - Prevent the ACPI device enumeration code from creating device objects of a wrong type in some cases (Rafael J Wysocki) - Add Skylake processors support to the Intel RAPL power capping driver (Brian Bian) - Drop the stale MAINTAINERS entry for the ACPI dock driver that is regarded as part of the ACPI core and maintained along with it now (Chao Yu) - Fix cpupower tool breakage caused by a library API change in libpci 3.3.0 (Lucas Stach)" * tag 'pm+acpi-4.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI / scan: Add a scan handler for PRP0001 ACPI / scan: Annotate physical_node_lock in acpi_scan_is_offline() ACPI / EC: fix NULL pointer dereference in acpi_ec_remove_query_handler() MAINTAINERS: remove maintainship entry of docking station driver powercap / RAPL: Add support for Intel Skylake processors cpufreq: intel_pstate: Fix an annoying !CONFIG_SMP warning intel_pstate: Change the setpoint for Atom params cpupower: fix breakage from libpci API change
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
Pull crypto fixes from Herbert Xu: "This push fixes a build problem with img-hash under non-standard configurations and a serious regression with sha512_ssse3 which can lead to boot failures" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: img-hash - CRYPTO_DEV_IMGTEC_HASH should depend on HAS_DMA crypto: x86/sha512_ssse3 - fixup for asm function prototype change
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Linus Torvalds authored
Merge tag 'platform-drivers-x86-v4.1-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86 Pull x86 platform driver updates from Darren Hart: "This series includes significant updates to the toshiba_acpi driver and the reintroduction of the dell-laptop keyboard backlight additions I had to revert previously. Also included are various fixes for typos, warnings, correctness, and minor bugs. Specifics: dell-laptop: - add support for keyboard backlight. toshiba_acpi: - adaptive keyboard, hotkey, USB sleep and charge, and backlight updates. Update sysfs documentation. toshiba_bluetooth: - fix enabling/disabling loop on recent devices apple-gmux: - lock iGP IO to protect from vgaarb changes other: - Fix typos, clear gcc warnings, clarify pr_* messages, correct return types, update MAINTAINERS" * tag 'platform-drivers-x86-v4.1-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (25 commits) toshiba_acpi: Do not register vendor backlight when acpi_video bl is available MAINTAINERS: Add me on list of Dell laptop drivers platform: x86: dell-laptop: Add support for keyboard backlight Documentation/ABI: Update sysfs-driver-toshiba_acpi entry toshiba_acpi: Fix pr_* messages from USB Sleep Functions toshiba_acpi: Update and fix USB Sleep and Charge modes wmi: Use bool function return values of true/false not 1/0 toshiba_bluetooth: Fix enabling/disabling loop on recent devices toshiba_bluetooth: Clean up *_add function and disable BT device at removal toshiba_bluetooth: Add three new functions to the driver toshiba_acpi: Fix the enabling of the Special Functions toshiba_acpi: Use the Hotkey Event Type function for keymap choosing toshiba_acpi: Add Hotkey Event Type function and definitions x86/wmi: delete unused wmi_data_lock mutex causing gcc warning apple-gmux: lock iGP IO to protect from vgaarb changes MAINTAINERS: Add missing Toshiba devices and add myself as maintainer toshiba_acpi: Update events in toshiba_acpi_notify intel-oaktrail: Fix trivial typo in comment thinkpad_acpi: off by one in adaptive_keyboard_hotkey_notify_hotkey() thinkpad_acpi: signedness bugs getting current_mode ...
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git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platformLinus Torvalds authored
Pull chrome platform updates from Olof Johansson: "Here's a set of updates to the Chrome OS platform drivers for this merge window. Main new things this cycle is: - Driver changes to expose the lightbar to users. With this, you can make your own blinkenlights on Chromebook Pixels. - Changes in the way that the atmel_mxt trackpads are probed. The laptop driver is trying to be smart and not instantiate the devices that don't answer to probe. For the trackpad that can come up in two modes (bootloader or regular), this gets complicated since the driver already knows how to handle the two modes including the actual addresses used. So now the laptop driver needs to know more too, instantiating the regular address even if the bootloader one is the probe that passed. - mfd driver improvements by Javier Martines Canillas, and a few bugfixes from him, kbuild and myself" * tag 'chrome-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform: platform/chrome: chromeos_laptop - instantiate Atmel at primary address platform/chrome: cros_ec_lpc - Depend on X86 || COMPILE_TEST platform/chrome: cros_ec_lpc - Include linux/io.h header file platform/chrome: fix platform_no_drv_owner.cocci warnings platform/chrome: cros_ec_lightbar - fix duplicate const warning platform/chrome: cros_ec_dev - fix Unknown escape '%' warning platform/chrome: Expose Chrome OS Lightbar to users platform/chrome: Create sysfs attributes for the ChromeOS EC mfd: cros_ec: Instantiate ChromeOS EC character device platform/chrome: Add Chrome OS EC userspace device interface platform/chrome: Add cros_ec_lpc driver for x86 devices mfd: cros_ec: Add char dev and virtual dev pointers mfd: cros_ec: Use fixed size arrays to transfer data with the EC
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git://git.kernel.org/pub/scm/linux/kernel/git/jesper/crisLinus Torvalds authored
Pull arch/cris updates from Jesper Nilsson: "Some much needed love for the CRIS-port. There's a bunch of changes this time, giving the CRISv32 port a bit of modern makeover with device-tree, irq domain and gpiolib support, and more switchover to generic frameworks. Some small fixes and removal of the theoretical SMP support brings up the rear" * tag 'cris-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jesper/cris: cris: fix integer overflow in ELF_ET_DYN_BASE CRISv32: use GENERIC_SCHED_CLOCK CRISv32: use MMIO clocksource CRISv32: use generic clockevents CRIS: use generic headers via Kbuild CRIS: use generic cmpxchg.h CRIS: use generic atomic.h CRIS: use generic atomic bitops CRISv10: remove redundant macros from system.h CRIS: remove SMP code CRISv32: don't enable irqs in INIT_THREAD CRISv32: handle multiple signals CRISv32: prevent bogus restarts on sigreturn CRISv32: don't attempt syscall restart on irq exit Add binding documentation for CRIS CRIS: add Axis 88 board device tree CRISv32: add device tree support CRISv32: add irq domains support CRIS: enable GPIOLIB
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git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: - fix for mm_dec_nr_pmds() from Scott. - fixes for oopses seen with KVM + THP from Aneesh. - build fixes from Aneesh & Shreyas. * tag 'powerpc-4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: powerpc/mm: Fix build error with CONFIG_PPC_TRANSACTIONAL_MEM disabled powerpc/kvm: Fix ppc64_defconfig + PPC_POWERNV=n build error powerpc/mm/thp: Return pte address if we find trans_splitting. powerpc/mm/thp: Make page table walk safe against thp split/collapse KVM: PPC: Remove page table walk helpers KVM: PPC: Use READ_ONCE when dereferencing pte_t pointer powerpc/hugetlb: Call mm_dec_nr_pmds() in hugetlb_free_pmd_range()
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull second batch of KVM changes from Paolo Bonzini: "This mostly includes the PPC changes for 4.1, which this time cover Book3S HV only (debugging aids, minor performance improvements and some cleanups). But there are also bug fixes and small cleanups for ARM, x86 and s390. The task_migration_notifier revert and real fix is still pending review, but I'll send it as soon as possible after -rc1" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (29 commits) KVM: arm/arm64: check IRQ number on userland injection KVM: arm: irqfd: fix value returned by kvm_irq_map_gsi KVM: VMX: Preserve host CR4.MCE value while in guest mode. KVM: PPC: Book3S HV: Use msgsnd for signalling threads on POWER8 KVM: PPC: Book3S HV: Translate kvmhv_commence_exit to C KVM: PPC: Book3S HV: Streamline guest entry and exit KVM: PPC: Book3S HV: Use bitmap of active threads rather than count KVM: PPC: Book3S HV: Use decrementer to wake napping threads KVM: PPC: Book3S HV: Don't wake thread with no vcpu on guest IPI KVM: PPC: Book3S HV: Get rid of vcore nap_count and n_woken KVM: PPC: Book3S HV: Move vcore preemption point up into kvmppc_run_vcpu KVM: PPC: Book3S HV: Minor cleanups KVM: PPC: Book3S HV: Simplify handling of VCPUs that need a VPA update KVM: PPC: Book3S HV: Accumulate timing information for real-mode code KVM: PPC: Book3S HV: Create debugfs file for each guest's HPT KVM: PPC: Book3S HV: Add ICP real mode counters KVM: PPC: Book3S HV: Move virtual mode ICP functions to real-mode KVM: PPC: Book3S HV: Convert ICS mutex lock to spin lock KVM: PPC: Book3S HV: Add guest->host real mode completion counters KVM: PPC: Book3S HV: Add helpers for lock/unlock hpte ...
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Stephen Rothwell authored
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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- 25 Apr, 2015 1 commit
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Dmitry Torokhov authored
The new Atmel MXT driver expects i2c client's address contain the primary (main address) of the chip, and calculates the expected bootloader address form the primary address. Unfortunately chrome_laptop does probe the devices and if touchpad (or touchscreen, or both) comes up in bootloader mode the i2c device gets instantiated with the bootloader address which confuses the driver. To work around this issue let's probe the primary address first. If the device is not detected at the primary address we'll probe alternative addresses as "dummy" devices. If any of them are found, destroy the dummy client and instantiate client with proper name at primary address still. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Olof Johansson <olof@lixom.net>
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- 24 Apr, 2015 19 commits
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Al Viro authored
Calling unlazy_walk() in walk_component() and do_last() when we find a symlink that needs to be followed doesn't acquire a reference to vfsmount. That's fine when the symlink is on the same vfsmount as the parent directory (which is almost always the case), but it's not always true - one _can_ manage to bind a symlink on top of something. And in such cases we end up with excessive mntput(). Cc: stable@vger.kernel.org # since 2.6.39 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Eric Sandeen authored
I_DIO_WAKEUP is never directly used, but fix it up anyway. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Jens Axboe authored
do_blockdev_direct_IO() increments and decrements the inode ->i_dio_count for each IO operation. It does this to protect against truncate of a file. Block devices don't need this sort of protection. For a capable multiqueue setup, this atomic int is the only shared state between applications accessing the device for O_DIRECT, and it presents a scaling wall for that. In my testing, as much as 30% of system time is spent incrementing and decrementing this value. A mixed read/write workload improved from ~2.5M IOPS to ~9.6M IOPS, with better latencies too. Before: clat percentiles (usec): | 1.00th=[ 33], 5.00th=[ 34], 10.00th=[ 34], 20.00th=[ 34], | 30.00th=[ 34], 40.00th=[ 34], 50.00th=[ 35], 60.00th=[ 35], | 70.00th=[ 35], 80.00th=[ 35], 90.00th=[ 37], 95.00th=[ 80], | 99.00th=[ 98], 99.50th=[ 151], 99.90th=[ 155], 99.95th=[ 155], | 99.99th=[ 165] After: clat percentiles (usec): | 1.00th=[ 95], 5.00th=[ 108], 10.00th=[ 129], 20.00th=[ 149], | 30.00th=[ 155], 40.00th=[ 161], 50.00th=[ 167], 60.00th=[ 171], | 70.00th=[ 177], 80.00th=[ 185], 90.00th=[ 201], 95.00th=[ 270], | 99.00th=[ 390], 99.50th=[ 398], 99.90th=[ 418], 99.95th=[ 422], | 99.99th=[ 438] In other setups, Robert Elliott reported seeing good performance improvements: https://lkml.org/lkml/2015/4/3/557 The more applications accessing the device, the worse it gets. Add a new direct-io flags, DIO_SKIP_DIO_COUNT, which tells do_blockdev_direct_IO() that it need not worry about incrementing or decrementing the inode i_dio_count for this caller. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Elliott, Robert (Server Storage) <elliott@hp.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jens Axboe <axboe@fb.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Johannes Berg authored
Al Viro's IOV changes broke 9p readdir() because the new code didn't abort the read when it returned nothing. The original code checked if the combined error/length was <= 0 but in the new code that accidentally got changed to just an error check. Add back the return from the function when nothing is read. Cc: Al Viro <viro@zeniv.linux.org.uk> Fixes: e1200fe6 ("9p: switch p9_client_read() to passing struct iov_iter *") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Chris Mason authored
__btrfs_write_out_cache is holding the ctl->tree_lock while it prepares a list of bitmaps to record in the free space cache. It was dropping the lock while it worked on other components, which made a window for free_bitmap() to free the bitmap struct without removing it from the list. This changes things to hold the lock the whole time, and also makes sure we hold the lock during enospc cleanup. Reported-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Chris Mason <clm@fb.com>
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Hans de Goede authored
commit a39f46df ("toshiba_acpi: Fix regression caused by backlight extra check code") causes the backlight to no longer work on the Toshiba Z30, reverting that commit fixes this but restores the original issue fixed by that commit. Looking at the toshiba_acpi backlight code for a fix for this I noticed that the toshiba code is the only code under platform/x86 which unconditionally registers a vendor acpi backlight interface, without checking for acpi_video backlight support first. This commit adds the necessary checks bringing toshiba_acpi in line with the other drivers, and fixing the Z30 regression without needing to revert the commit causing it. Chances are that there will be some Toshiba models which have a non working acpi-video implementation while the toshiba vendor backlight interface does work, this commit adds an empty dmi_id table where such systems can be added, this is identical to how other drivers handle such systems. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1206036 BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=86521Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-and-tested-by: Azael Avalos <coproscefalo@gmail.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/soundLinus Torvalds authored
Pull sound fixes from Takashi Iwai: "Here are a few fixes that have been pending since the previous pull request: a regression fix for HD-audio multiple SPDIF / HDMI devices, several ALC256 codec fixes, a couple of i915 HDMI audio fixes, and various small fixes. Nothing exciting, just boring, but things good to have" * tag 'sound-fix-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - fix headset mic detection problem for one more machine ALSA: hda/realtek - Fix Headphone Mic doesn't recording for ALC256 ALSA: hda - fix "num_steps = 0" error on ALC256 ALSA: usb-audio: Fix audio output on Roland SC-D70 sound module ALSA: hda - add AZX_DCAPS_I915_POWERWELL to Baytrail ALSA: hda - only sync BCLK to the display clock for Haswell & Broadwell ALSA: hda - Mute headphone pin on suspend on XPS13 9333 sound/oss: fix deadlock in sequencer_ioctl(SNDCTL_SEQ_OUTOFBAND) ALSA: asound.h - use SNDRV_CTL_ELEM_ID_NAME_MAXLEN ALSA: hda - potential (but unlikely) uninitialized variable ALSA: hda - Fix regression for slave SPDIF setups ALSA: intel8x0: Check pci_iomap() success for DEVICE_ALI ALSA: hda - simplify azx_has_pm_runtime
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git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pendingLinus Torvalds authored
Pull SCSI target updates from Nicholas Bellinger: "Lots of activity in target land the last months. The highlights include: - Convert fabric drivers tree-wide to target_register_template() (hch + bart) - iser-target hardening fixes + v1.0 improvements (sagi) - Convert iscsi_thread_set usage to kthread.h + kill iscsi_target_tq.c (sagi + nab) - Add support for T10-PI WRITE_STRIP + READ_INSERT operation (mkp + sagi + nab) - DIF fixes for CONFIG_DEBUG_SG=y + UNMAP file emulation (akinobu + sagi + mkp) - Extended TCMU ABI v2 for future BIDI + DIF support (andy + ilias) - Fix COMPARE_AND_WRITE handling for NO_ALLLOC drivers (hch + nab) Thanks to everyone who contributed this round with new features, bug-reports, fixes, cleanups and improvements. Looking forward, it's currently shaping up to be a busy v4.2 as well" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (69 commits) target: Put TCMU under a new config option target: Version 2 of TCMU ABI target: fix tcm_mod_builder.py target/file: Fix UNMAP with DIF protection support target/file: Fix SG table for prot_buf initialization target/file: Fix BUG() when CONFIG_DEBUG_SG=y and DIF protection enabled target: Make core_tmr_abort_task() skip TMFs target/sbc: Update sbc_dif_generate pr_debug output target/sbc: Make internal DIF emulation honor ->prot_checks target/sbc: Return INVALID_CDB_FIELD if DIF + sess_prot_type disabled target: Ensure sess_prot_type is saved across session restart target/rd: Don't pass incomplete scatterlist entries to sbc_dif_verify_* target: Remove the unused flag SCF_ACK_KREF target: Fix two sparse warnings target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling target: simplify the target template registration API target: simplify target_xcopy_init_pt_lun target: remove the unused SCF_CMD_XCOPY_PASSTHROUGH flag target/rd: reduce code duplication in rd_execute_rw() tcm_loop: fixup tpgt string to integer conversion ...
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Linus Torvalds authored
Merge tag 'pwm/for-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm changes from Thierry Reding: "Not much has been happening in PWM land lately, so this contains mostly minor fixes that didn't seem urgent enough for a late pull-request last cycle" * tag 'pwm/for-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: pwm: Remove __init initializer for pwm_add_table() pwm: samsung: Fix output race on disabling pwm: mxs: Fix period divider computation pwm: atmel-hlcdc: Add errata handling for sama5d4 pwm: pca9685: Constify struct regmap_config pwm: imx-pwm: add explicit compatible strings and required clock properties
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git://git.kernel.org/pub/scm/linux/kernel/git/sumits/dma-bufLinus Torvalds authored
Pull dma-buf updates from Sumit Semwal: "Minor cleanup only; this could've gone in for the 4.0 merge window, but for a copy-paste stupidity from me. It has been in the for-next since then, and no issues reported. - cleanup of dma_buf_export() - correction of copy-paste stupidity while doing the cleanup" * tag 'dma-buf-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/sumits/dma-buf: staging: android: ion: fix wrong init of dma_buf_export_info dma-buf: cleanup dma_buf_export() to make it easily extensible
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git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds authored
Pull slave-dmaengine updates from Vinod Koul: - new drivers for: - Ingenic JZ4780 controller - APM X-Gene controller - Freescale RaidEngine device - Renesas USB Controller - remove device_alloc_chan_resources dummy handlers - sh driver cleanups for peri peri and related emmc and asoc patches as well - fixes and enhancements spread over the drivers * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (59 commits) dmaengine: dw: don't prompt for DW_DMAC_CORE dmaengine: shdmac: avoid unused variable warnings dmaengine: fix platform_no_drv_owner.cocci warnings dmaengine: pch_dma: fix memory leak on failure path in pch_dma_probe() dmaengine: at_xdmac: unlock spin lock before return dmaengine: xgene: devm_ioremap() returns NULL on error dmaengine: xgene: buffer overflow in xgene_dma_init_channels() dmaengine: usb-dmac: Fix dereferencing freed memory 'desc' dmaengine: sa11x0: report slave capabilities to upper layers dmaengine: vdma: Fix compilation warnings dmaengine: fsl_raid: statify fsl_re_chan_probe dmaengine: Driver support for FSL RaidEngine device. dmaengine: xgene_dma_init_ring_mngr() can be static Documentation: dma: Add documentation for the APM X-Gene SoC DMA device DTS binding arm64: dts: Add APM X-Gene SoC DMA device and DMA clock DTS nodes dmaengine: Add support for APM X-Gene SoC DMA engine driver dmaengine: usb-dmac: Add Renesas USB DMA Controller (USB-DMAC) driver dmaengine: renesas,usb-dmac: Add device tree bindings documentation dmaengine: edma: fixed wrongly initialized data parameter to the edma callback dmaengine: ste_dma40: fix implicit conversion ...
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git://neil.brown.name/mdLinus Torvalds authored
Pull md updates from Neil Brown: "More updates that usual this time. A few have performance impacts which hould mostly be positive, but RAID5 (in particular) can be very work-load ensitive... We'll have to wait and see. Highlights: - "experimental" code for managing md/raid1 across a cluster using DLM. Code is not ready for general use and triggers a WARNING if used. However it is looking good and mostly done and having in mainline will help co-ordinate development. - RAID5/6 can now batch multiple (4K wide) stripe_heads so as to handle a full (chunk wide) stripe as a single unit. - RAID6 can now perform read-modify-write cycles which should help performance on larger arrays: 6 or more devices. - RAID5/6 stripe cache now grows and shrinks dynamically. The value set is used as a minimum. - Resync is now allowed to go a little faster than the 'mininum' when there is competing IO. How much faster depends on the speed of the devices, so the effective minimum should scale with device speed to some extent" * tag 'md/4.1' of git://neil.brown.name/md: (58 commits) md/raid5: don't do chunk aligned read on degraded array. md/raid5: allow the stripe_cache to grow and shrink. md/raid5: change ->inactive_blocked to a bit-flag. md/raid5: move max_nr_stripes management into grow_one_stripe and drop_one_stripe md/raid5: pass gfp_t arg to grow_one_stripe() md/raid5: introduce configuration option rmw_level md/raid5: activate raid6 rmw feature md/raid6 algorithms: xor_syndrome() for SSE2 md/raid6 algorithms: xor_syndrome() for generic int md/raid6 algorithms: improve test program md/raid6 algorithms: delta syndrome functions raid5: handle expansion/resync case with stripe batching raid5: handle io error of batch list RAID5: batch adjacent full stripe write raid5: track overwrite disk count raid5: add a new flag to track if a stripe can be batched raid5: use flex_array for scribble data md raid0: access mddev->queue (request queue member) conditionally because it is not set when accessed from dm-raid md: allow resync to go faster when there is competing IO. md: remove 'go_faster' option from ->sync_request() ...
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linuxLinus Torvalds authored
Pull second batch of devicetree updates from Rob Herring: "As Grant mentioned in the first devicetree pull request, here is the 2nd batch of DT changes for 4.1. The main remaining item here is the endianness bindings and related 8250 driver support. - DT endianness specification bindings - big-endian 8250 serial support - DT overlay unittest updates - various DT doc updates - compile fixes for OF_IRQ=n" * tag 'devicetree-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: frv: add io{read,write}{16,32}be functions mn10300: add io{read,write}{16,32}be functions Documentation: DT bindings: add doc for Altera's SoCFPGA platform of: base: improve of_get_next_child() kernel-doc Doc: dt: arch_timer: discourage clock-frequency use of: unittest: overlay: Keep track of created overlays of/fdt: fix allocation size for device node path serial: of_serial: Support big-endian register accesses serial: 8250: Add support for big-endian MMIO accesses of: Document {little,big,native}-endian bindings of/fdt: Add endianness helper function for early init code of: Add helper function to check MMIO register endianness of/fdt: Remove "reg" data prints from early_init_dt_scan_memory of: add vendor prefix for Artesyn of: Add dummy of_irq_to_resource_table() for IRQ_OF=n of: OF_IRQ should depend on IRQ_DOMAIN
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linuxLinus Torvalds authored
Pull initial ACPI support for arm64 from Will Deacon: "This series introduces preliminary ACPI 5.1 support to the arm64 kernel using the "hardware reduced" profile. We don't support any peripherals yet, so it's fairly limited in scope: - MEMORY init (UEFI) - ACPI discovery (RSDP via UEFI) - CPU init (FADT) - GIC init (MADT) - SMP boot (MADT + PSCI) - ACPI Kconfig options (dependent on EXPERT) ACPI for arm64 has been in development for a while now and hardware has been available that can boot with either FDT or ACPI tables. This has been made possible by both changes to the ACPI spec to cater for ARM-based machines (known as "hardware-reduced" in ACPI parlance) but also a Linaro-driven effort to get this supported on top of the Linux kernel. This pull request is the result of that work. These changes allow us to initialise the CPUs, interrupt controller, and timers via ACPI tables, with memory information and cmdline coming from EFI. We don't support a hybrid ACPI/FDT scheme. Of course, there is still plenty of work to do (a serial console would be nice!) but I expect that to happen on a per-driver basis after this core series has been merged. Anyway, the diff stat here is fairly horrible, but splitting this up and merging it via all the different subsystems would have been extremely painful. Instead, we've got all the relevant Acks in place and I've not seen anything other than trivial (Kconfig) conflicts in -next (for completeness, I've included my resolution below). Nearly half of the insertions fall under Documentation/. So, we'll see how this goes. Right now, it all depends on EXPERT and I fully expect people to use FDT by default for the immediate future" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (31 commits) ARM64 / ACPI: make acpi_map_gic_cpu_interface() as void function ARM64 / ACPI: Ignore the return error value of acpi_map_gic_cpu_interface() ARM64 / ACPI: fix usage of acpi_map_gic_cpu_interface ARM64: kernel: acpi: honour acpi=force command line parameter ARM64: kernel: acpi: refactor ACPI tables init and checks ARM64: kernel: psci: let ACPI probe PSCI version ARM64: kernel: psci: factor out probe function ACPI: move arm64 GSI IRQ model to generic GSI IRQ layer ARM64 / ACPI: Don't unflatten device tree if acpi=force is passed ARM64 / ACPI: additions of ACPI documentation for arm64 Documentation: ACPI for ARM64 ARM64 / ACPI: Enable ARM64 in Kconfig XEN / ACPI: Make XEN ACPI depend on X86 ARM64 / ACPI: Select ACPI_REDUCED_HARDWARE_ONLY if ACPI is enabled on ARM64 clocksource / arch_timer: Parse GTDT to initialize arch timer irqchip: Add GICv2 specific ACPI boot support ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi ACPI / processor: Make it possible to get CPU hardware ID via GICC ACPI / processor: Introduce phys_cpuid_t for CPU hardware ID ARM64 / ACPI: Parse MADT for SMP initialization ...
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git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds authored
Pull ARM fixes from Russell King: "A few fixes for the recently merged development updates: - the update to convert a code branch in the procinfo structure forgot to update the nommu code. - VDSO only supported for V7 CPUs and later. - VDSO build creates files which should be ignored by git but are not. - ensure that make arch/arm/vdso/ doesn't build if it isn't enabled" * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 8344/1: VDSO: honor CONFIG_VDSO in Makefile ARM: 8343/1: VDSO: add build artifacts to .gitignore ARM: Fix nommu booting ARM: 8342/1: VDSO: depend on CPU_V7
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git://git.rocketboards.org/linux-socfpga-nextLinus Torvalds authored
Pull arch/nios2 updates from Ley Foon Tan: - update cache management code - rework trap handler with new define trap #. - fix on check header warning. * tag 'nios2-v4.1-rc1' of git://git.rocketboards.org/linux-socfpga-next: nios2: rework cache nios2: Add types.h header required for __u32 type nios2: rework trap handler nios2: remove end address checking for initda
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Linus Torvalds authored
Merge tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux Pull blackfin updates from Steven Miao. * tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux: eth: bf609 eth clock: add pclk clock for stmmac driver probe blackfin: Wire up missing syscalls arch: blackfin: kernel: kgdb: Remove unused function dma: fix build error after update to v3.19 blackfin: io: define __raw_readx/writex with bfin_readx/writex bf609: add resources for lcd nl8048 pm: sometimes wake up from suspend to RAM would fail debug-mmrs: Eliminate all traces of the USB_PHY_TEST MMR bf609: remove softswitch i2c configuration from adv7842 and adv7511 platform data bf609: add platform data for soft switch devices on the video extenders bf609: enable soft switch gpio driver by default bf609: add gpio soft switch platform data for mcp23017 i2c devices bf609: use new SND_BF6XX_PCM to choose audio pcm driver bug[220] kgdb: change the smp cross core function entry arch: blackfin: kernel: setup.c: Cleaning up missing null-terminate in conjunction with strncpy blackfin: defconfigs: cleanup unused CONFIG_MTD_CHAR, add MTD_SPI_NOR for BF537-STAMP
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git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metagLinus Torvalds authored
Pull Metag architecture updates from James Hogan: "Just the one change for v4.1-rc1. A minor cleanup of copy_thread()" * tag 'metag-for-v4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: metag: copy_thread(): rename 'arg' argument to 'kthread_arg'
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git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arcLinus Torvalds authored
Pull ARC updates from Vineet Gupta: - perf fixes/improvements - misc cleanups * tag 'arc-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: perf: don't add code for impossible case ARC: perf: Rename DT binding to not confuse with power mgmt ARC: perf: add user space attribution in callchains ARC: perf: Add kernel callchain support ARC: perf: support cache hit/miss ratio ARC: perf: Add some comments/debug stuff ARC: perf: make @arc_pmu static global ARC: mem init spring cleaning - No functional changes ARC: Fix RTT boot printing ARC: fold __builtin_constant_p() into test_bit() ARC: rename unhandled exception handler ARC: cosmetic: Remove unused ECR bitfield masks ARC: Fix WRITE_BCR ARC: [nsimosci] Update defconfig arc: copy_thread(): rename 'arg' argument to 'kthread_arg'
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