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2015-04-13Merge branch 'core-efi-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull EFI update from Ingo Molnar: "This tree includes various fixes, cleanups, a new efi=debug boot option and EFI boot stub memory allocation optimizations" * 'core-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: efi/libstub: Retrieve FDT size when loaded from UEFI config table efi: Clean up the efi_call_phys_[prolog|epilog]() save/restore interaction efi: Disable interrupts around EFI calls, not in the epilog/prolog calls x86/efi: Add a "debug" option to the efi= cmdline firmware: dmi_scan: Use direct access to static vars firmware: dmi_scan: Use full dmi version for SMBIOS3
2015-04-13Merge tag 'md/4.0-rc7-fix' of git://neil.brown.name/mdLinus Torvalds
Pull md fixes from Neil Brown: "Two regression fixes for md, one fairly recent and minor (diskstats has confusing data) and one older and more serious - RAID0 with non-power-of-2 chunksize corrupts data. I guess (almost) no-one uses non-power-of-2 chunks. Summary: - Revert recent change which broke IO accounting. - Fix bug with RAID0 arrays with non-power-of-2 chunk size" * tag 'md/4.0-rc7-fix' of git://neil.brown.name/md: md/raid0: fix bug with chunksize not a power of 2. md: fix md io stats accounting broken
2015-04-13Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM updates from Paolo Bonzini: "First batch of KVM changes for 4.1 The most interesting bit here is irqfd/ioeventfd support for ARM and ARM64. Summary: ARM/ARM64: fixes for live migration, irqfd and ioeventfd support (enabling vhost, too), page aging s390: interrupt handling rework, allowing to inject all local interrupts via new ioctl and to get/set the full local irq state for migration and introspection. New ioctls to access memory by virtual address, and to get/set the guest storage keys. SIMD support. MIPS: FPU and MIPS SIMD Architecture (MSA) support. Includes some patches from Ralf Baechle's MIPS tree. x86: bugfixes (notably for pvclock, the others are small) and cleanups. Another small latency improvement for the TSC deadline timer" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (146 commits) KVM: use slowpath for cross page cached accesses kvm: mmu: lazy collapse small sptes into large sptes KVM: x86: Clear CR2 on VCPU reset KVM: x86: DR0-DR3 are not clear on reset KVM: x86: BSP in MSR_IA32_APICBASE is writable KVM: x86: simplify kvm_apic_map KVM: x86: avoid logical_map when it is invalid KVM: x86: fix mixed APIC mode broadcast KVM: x86: use MDA for interrupt matching kvm/ppc/mpic: drop unused IRQ_testbit KVM: nVMX: remove unnecessary double caching of MAXPHYADDR KVM: nVMX: checks for address bits beyond MAXPHYADDR on VM-entry KVM: x86: cache maxphyaddr CPUID leaf in struct kvm_vcpu KVM: vmx: pass error code with internal error #2 x86: vdso: fix pvclock races with task migration KVM: remove kvm_read_hva and kvm_read_hva_atomic KVM: x86: optimize delivery of TSC deadline timer interrupt KVM: x86: extract blocking logic from __vcpu_run kvm: x86: fix x86 eflags fixed bit KVM: s390: migrate vcpu interrupt state ...
2015-04-13Merge tag 'linux-kselftest-4.1-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kselftest updates from Shuah Khan: "This is a milestone update in a sense. Several new tests and install and packaging support is added in this update. This update adds install and packaging tools developed on top of back-end shared logic enhancemnets to run and install tests. In addition several timer tests are added. - New timer tests from John Stultz - rtc test from Prarit Bhargava - Enhancements to un and install tests from Michael Ellerman - Install and packaging tools from Shuah Khan - Cross-compilation enablement from Tyler Baker - A couple of bug fixes" * tag 'linux-kselftest-4.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (42 commits) ftracetest: Do not use usleep directly selftest/mqueue: enable cross compilation selftest/ipc: enable cross compilation selftest/memfd: include default header install path selftest/mount: enable cross compilation selftest/memfd: enable cross compilation kselftests: timers: Make set-timer-lat fail more gracefully for !CAP_WAKE_ALARM selftests: Change memory on-off-test.sh name to be unique selftests: change cpu on-off-test.sh name to be unique selftests/mount: Make git ignore all binaries in mount test suite kselftests: timers: Reduce default runtime on inconsistency-check and set-timer-lat ftracetest: Convert exit -1 to exit $FAIL ftracetest: Cope properly with stack tracer not being enabled tools, update rtctest.c to verify passage of time Documentation, split up rtc.txt into documentation and test file selftests: Add tool to generate kselftest tar archive selftests: Add kselftest install tool selftests: Set CC using CROSS_COMPILE once in lib.mk selftests: Add install support for the powerpc tests selftests/timers: Use shared logic to run and install tests ...
2015-04-12Linux 4.0Linus Torvalds
2015-04-12Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs and fs fixes from Al Viro: "Several AIO and OCFS2 fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: ocfs2: _really_ sync the right range ocfs2_file_write_iter: keep return value and current position update in sync [regression] ocfs2: do *not* increment ->ki_pos twice ioctx_alloc(): fix vma (and file) leak on failure fix mremap() vs. ioctx_kill() race
2015-04-12Merge branch 'fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal Pull last minute thermal-SoC management fixes from Eduardo Valentin: "Specifics: - Minor fixes on ST and RCAR thermal drivers. - Avoid flooding kernel log when driver returns -EAGAIN. Note: I am sending this pull on Rui's behalf while he fixes issues in his Linux box" * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal: drivers: thermal: st: remove several sparse warnings thermal: constify of_device_id array thermal: Do not log an error if thermal_zone_get_temp returns -EAGAIN thermal: rcar: Fix typo in r8a73a4 SoC name
2015-04-11Merge tag 'asoc-fix-v4.0-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound Pull last-minute ASoC fix from Mark Brown: "This patch backs out a change that came in during the merge window which selects a configuration for GPIO4 on pcm512x CODECs that may not be suitable for all systems using the device. Changes for v4.1 will make this properly configurable but for now it's safest to revert to the v3.19 behaviour and leave the pin configuration alone. Sorry for sending this direct at the last minute but due to the GPIO misuse it'd be really good to get it in the release and I'd not realised it hadn't been sent yet - between some travel, a job change and other non-urgent fixes coming in I'd lost track of the urgency. It's been in -next for several weeks now, is isolated to the driver and fairly clear to inspection" * tag 'asoc-fix-v4.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound: ASoC: pcm512x: Remove hardcoding of pll-lock to GPIO4
2015-04-11ASoC: pcm512x: Remove hardcoding of pll-lock to GPIO4Howard Mitchell
Currently GPIO4 is hardcoded to output the pll-lock signal. Unfortunately this is after the pll-out GPIO is configured which is selectable in the device tree. Therefore it is not possible to use GPIO4 for pll-out. Therefore this patch removes the configuration of GPIO4. Signed-off-by: Howard Mitchell <hm@hmbedded.co.uk> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-11Revert "dmaengine: Add a warning for drivers not using the generic slave ↵Linus Torvalds
caps retrieval" This reverts commit ecc19d17868be9c9f8f00ed928791533c420f3e0. It added a new warning to try to encourage driver writers to set the device capabities properly, but drivers haven't been updated and in the meantime it just generaters a scary message that users cannot actually do anything about. Warnings like these are appropriate if you actually expect to fix the code that causes them. They are not appropriate for releases. Requested-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-11blk-mq: initialize 'struct request' and associated data to zeroLinus Torvalds
Jan Engelhardt reports a strange oops with an invalid ->sense_buffer pointer in scsi_init_cmd_errh() with the blk-mq code. The sense_buffer pointer should have been initialized by the call to scsi_init_request() from blk_mq_init_rq_map(), but there seems to be some non-repeatable memory corruptor. This patch makes sure we initialize the whole struct request allocation (and the associated 'struct scsi_cmnd' for the SCSI case) to zero, by using __GFP_ZERO in the allocation. The old code initialized a couple of individual fields, leaving the rest undefined (although many of them are then initialized in later phases, like blk_mq_rq_ctx_init() etc. It's not entirely clear why this matters, but it's the rigth thing to do regardless, and with 4.0 imminent this is the defensive "let's just make sure everything is initialized properly" patch. Tested-by: Jan Engelhardt <jengelh@inai.de> Acked-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-11Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull dmaengine fix from Vinod Koul: "I have one more fix to fix the boot warning on cppi driver due to missing capabilities" * 'fixes' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: cppi41: add missing bitfields
2015-04-11Merge tag 'for-linus-4.0-1' of git://git.code.sf.net/p/openipmi/linux-ipmiLinus Torvalds
Pull late ipmi fixes from Corey Minyard: "Some annoying issues in the IPMI driver that would be good to have fixed before 4.0 is released. These got reported or discovered late, but they will avoid some situations that would cause lots of log spam and in one case a deadlock" * tag 'for-linus-4.0-1' of git://git.code.sf.net/p/openipmi/linux-ipmi: ipmi_ssif: Use interruptible completion for waiting in the thread ipmi/powernv: Fix minor locking bug ipmi: Handle BMCs that don't allow clearing the rcv irq bit
2015-04-11dmaengine: cppi41: add missing bitfieldsFelipe Balbi
Add missing directions, residue_granularity, srd_addr_widths and dst_addr_widths bitfields. Without those we will see a kernel WARN() when loading musb on am335x devices. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2015-04-10ipmi_ssif: Use interruptible completion for waiting in the threadCorey Minyard
The code was using an normal completion, but that caused stuck task errors after a while. Use an interruptible one to avoid that. Signed-off-by: Corey Minyard <cminyard@mvista.com>
2015-04-10ipmi/powernv: Fix minor locking bugAlistair Popple
If ipmi_powernv_recv(...) is called without a current message it prints a warning and returns. However it fails to release the message lock causing the system to dead lock during any subsequent IPMI operations. This error path should never normally be taken unless there are bugs elsewhere in the system. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Corey Minyard <cminyard@mvista.com>
2015-04-10ipmi: Handle BMCs that don't allow clearing the rcv irq bitCorey Minyard
Some BMCs don't let you clear the receive irq bit in the global enables. This is kind of silly, but they give an error if you try to clear it. Compensate for this by detecting the situation and working around it. Signed-off-by: Corey Minyard <cminyard@mvista.com> Tested-by: Thomas D <whissi@whissi.de> Reviewed-by: Thomas D <whissi@whissi.de>
2015-04-10Merge tag 'scsi-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "This is our remaining set of three fixes for 4.0: two oops fixes(one for cable pulls triggering oopses and the other be2iscsi specific) and one warn on in sysfs on multipath devices using enclosures" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: Defer processing of REQ_PREEMPT requests for blocked devices be2iscsi: Fix kernel panic when device initialization fails enclosure: fix WARN_ON removing an adapter in multi-path devices
2015-04-10Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pendingLinus Torvalds
Pull SCSI target fixes from Nicholas Bellinger: "Just a few small fixes: Two from Andy, the first addresses a v4.0 target specific regression to a user visible configfs attribute, and the second adds a set of missing brackets around IPv6 discovery portal information within iscsi-target. And one from Mike that fixes an OOPs regression in traditional iscsi-target when an iovec allocation fails, that has been present since v3.10.y code. (CC'd to stable)" * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: iscsi target: fix oops when adding reject pdu iscsi-target: TargetAddress in SendTargets should bracket ipv6 addresses target: Allow userspace to write 1 to attrib/emulate_fua_write
2015-04-10iscsi target: fix oops when adding reject pduMike Christie
This fixes a oops due to a double list add when adding a reject PDU for iscsit_allocate_iovecs allocation failures. The cmd has already been added to the conn_cmd_list in iscsit_setup_scsi_cmd, so this has us call iscsit_reject_cmd. Note that for ERL0 the reject PDU is not actually sent, so this patch is not completely tested. Just verified we do not oops. The problem is the add reject functions return -1 which is returned all the way up to iscsi_target_rx_thread which for ERL0 will drop the connection. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Cc: <stable@vger.kernel.org> # v3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-04-10Merge tag 'sound-4.0' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "Here are fixes gathered for 4.0-final; one FireFire endian fix, two USB-audio quirks, and three HD-audio quirks. All relatively small and device-specific fixes, should be pretty safe to apply" * tag 'sound-4.0' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: usb - Creative USB X-Fi Pro SB1095 volume knob support ALSA: hda - Fix headphone pin config for Lifebook T731 ALSA: bebob: fix to processing in big-endian machine for sending cue ALSA: hda/realtek - Make more stable to get pin sense for ALC283 ALSA: usb-audio: don't try to get Benchmark DAC1 sample rate ALSA: hda/realtek - Support Dell headset mode for ALC256
2015-04-10Merge tag 'nios2-fixes-v4.0-final' of ↵Linus Torvalds
git://git.rocketboards.org/linux-socfpga-next Pull arch/nios2 fixes from Ley Foon Tan: "There are 3 arch/nios2 fixes for 4.0 final: - fix cache coherency issue when debugging with gdb - move restart_block to struct task_struct (aligned with other architectures) - fix for missing registers defines for ptrace" * tag 'nios2-fixes-v4.0-final' of git://git.rocketboards.org/linux-socfpga-next: nios2: fix cache coherency issue when debug with gdb nios2: add missing ptrace registers defines nios2: signal: Move restart_block to struct task_struct
2015-04-10KVM: use slowpath for cross page cached accessesRadim Krčmář
kvm_write_guest_cached() does not mark all written pages as dirty and code comments in kvm_gfn_to_hva_cache_init() talk about NULL memslot with cross page accesses. Fix all the easy way. The check is '<= 1' to have the same result for 'len = 0' cache anywhere in the page. (nr_pages_needed is 0 on page boundary.) Fixes: 8f964525a121 ("KVM: Allow cross page reads and writes from cached translations.") Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Message-Id: <20150408121648.GA3519@potion.brq.redhat.com> Reviewed-by: Wanpeng Li <wanpeng.li@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-04-10md/raid0: fix bug with chunksize not a power of 2.NeilBrown
Since commit 20d0189b1012a37d2533a87fb451f7852f2418d1 in v3.14-rc1 RAID0 has performed incorrect calculations when the chunksize is not a power of 2. This happens because "sector_div()" modifies its first argument, but this wasn't taken into account in the patch. So restore that first arg before re-using the variable. Reported-by: Joe Landman <joe.landman@gmail.com> Reported-by: Dave Chinner <david@fromorbit.com> Fixes: 20d0189b1012a37d2533a87fb451f7852f2418d1 Cc: stable@vger.kernel.org (3.14 and later). Signed-off-by: NeilBrown <neilb@suse.de>
2015-04-10nios2: fix cache coherency issue when debug with gdbLey Foon Tan
Remove the end address checking for flushda function. We need to flush each address line for flushda instruction, from start to end address. This is because flushda instruction only flush the cache if tag and line fields are matched. Change to use ldwio instruction (bypass cache) to load the instruction that causing trap. Our interest is the actual instruction that executed by the processor, this should be uncached. Note, EA address might be an userspace cached address. Signed-off-by: Ley Foon Tan <lftan@altera.com>
2015-04-09Merge tag 'pm+acpi-4.0-rc8' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management and ACPI fixes from Rafael Wysocki: "These are stable-candidate fixes of some recently reported issues in the cpufreq core, cpuidle core, the ACPI cpuidle driver and the hibernate core. Specifics: - Revert a 3.17 hibernate commit that was supposed to fix an issue related to e820 reserved regions, but broke resume from hibernation on Lenovo x230 (Rafael J Wysocki). - Prevent the ACPI cpuidle driver from overwriting the name and description of the C0 state set by the core when the list of C-states changes (Thomas Schlichter). - Remove the no longer needed state_count field from struct cpuidle_device which prevents the list of C-states shown by the sysfs interface from becoming incorrect when the current number of them is different from the number of C-states on boot (Bartlomiej Zolnierkiewicz). - The cpufreq core updates the policy object of the only online CPU during system resume to make it reflect the current hardware state, but it always assumes that CPU to be CPU0 which need not be the case, so fix the code to avoid that assumption (Viresh Kumar)" * tag 'pm+acpi-4.0-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: Revert "PM / hibernate: avoid unsafe pages in e820 reserved regions" cpuidle: ACPI: do not overwrite name and description of C0 cpuidle: remove state_count field from struct cpuidle_device cpufreq: Schedule work for the first-online CPU on resume
2015-04-09Merge branches 'pm-sleep', 'pm-cpufreq' and 'pm-cpuidle'Rafael J. Wysocki
* pm-sleep: Revert "PM / hibernate: avoid unsafe pages in e820 reserved regions" * pm-cpufreq: cpufreq: Schedule work for the first-online CPU on resume * pm-cpuidle: cpuidle: ACPI: do not overwrite name and description of C0 cpuidle: remove state_count field from struct cpuidle_device
2015-04-09Merge tag 'pci-v4.0-fixes-3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI fixes from Bjorn Helgaas: "Here are some fixes for v4.0. I apologize for how late they are. We were hoping for some better fixes, but couldn't get them polished in time. These fix: - a Xen domU oops with PCI passthrough devices - a sparc T5 boot failure - a STM SPEAr13xx crash (use after initdata freed) - a cpcihp hotplug driver thinko - an AER thinko that printed stack junk Details: Enumeration - Don't look for ACPI hotplug parameters if ACPI is disabled (Bjorn Helgaas) Resource management - Revert "sparc/PCI: Clip bridge windows to fit in upstream windows" (Bjorn Helgaas) AER - Avoid info leak in __print_tlp_header() (Rasmus Villemoes) PCI device hotplug - Add missing curly braces in cpci_configure_slot() (Dan Carpenter) ST Microelectronics SPEAr13xx host bridge driver - Drop __initdata from spear13xx_pcie_driver (Matwey V. Kornilov) * tag 'pci-v4.0-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: Revert "sparc/PCI: Clip bridge windows to fit in upstream windows" PCI: Don't look for ACPI hotplug parameters if ACPI is disabled PCI: cpcihp: Add missing curly braces in cpci_configure_slot() PCI/AER: Avoid info leak in __print_tlp_header() PCI: spear: Drop __initdata from spear13xx_pcie_driver
2015-04-09ALSA: usb - Creative USB X-Fi Pro SB1095 volume knob supportDmitry M. Fedin
Adds an entry for Creative USB X-Fi to the rc_config array in mixer_quirks.c to allow use of volume knob on the device. Adds support for newer X-Fi Pro card, known as "Model No. SB1095" with USB ID "041e:3237" Signed-off-by: Dmitry M. Fedin <dmitry.fedin@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-04-09ocfs2: _really_ sync the right rangeAl Viro
"ocfs2 syncs the wrong range" had been broken; prior to it the code was doing the wrong thing in case of O_APPEND, all right, but _after_ it we were syncing the wrong range in 100% cases. *ppos, aka iocb->ki_pos is incremented prior to that point, so we are always doing sync on the area _after_ the one we'd written to. Spotted by Joseph Qi <joseph.qi@huawei.com> back in January; unfortunately, I'd missed his mail back then ;-/ Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-09nios2: add missing ptrace registers definesLey Foon Tan
These are all register available in nios2. Signed-off-by: Ley Foon Tan <lftan@altera.com>
2015-04-08Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds
Pull drm fixes from Dave Airlie: "Final drm fixes: one core locking imbalance regression, and a bunch of i915 baytrail s/r fixes" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: drm: fix drm_mode_getconnector() locking imbalance regression drm/i915/vlv: remove wait for previous GFX clk disable request drm/i915/chv: Remove Wait for a previous gfx force-off drm/i915/vlv: save/restore the power context base reg
2015-04-08Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull ceph revert from Sage Weil: "This corrects a recent misadventure with __GFP_MEMALLOC and PF_MEMALLOC; it turns out it's not a good fit for RBD and we're better off relying on dirty page throttling" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: Revert "libceph: use memalloc flags for net IO"
2015-04-08Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc fixes from Andrew Morton: "Three fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm: numa: disable change protection for vma(VM_HUGETLB) include/linux/dmapool.h: declare struct device mm: move zone lock to a different cache line than order-0 free page lists
2015-04-08Copy the kernel module data from user space in chunksLinus Torvalds
Unlike most (all?) other copies from user space, kernel module loading is almost unlimited in size. So we do a potentially huge "copy_from_user()" when we copy the module data from user space to the kernel buffer, which can be a latency concern when preemption is disabled (or voluntary). Also, because 'copy_from_user()' clears the tail of the kernel buffer on failures, even a *failed* copy can end up wasting a lot of time. Normally neither of these are concerns in real life, but they do trigger when doing stress-testing with trinity. Running in a VM seems to add its own overheadm causing trinity module load testing to even trigger the watchdog. The simple fix is to just chunk up the module loading, so that it never tries to copy insanely big areas in one go. That bounds the latency, and also the amount of (unnecessarily, in this case) cleared memory for the failure case. Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-08x86: clean up/fix 'copy_in_user()' tail zeroingLinus Torvalds
The rule for 'copy_from_user()' is that it zeroes the remaining kernel buffer even when the copy fails halfway, just to make sure that we don't leave uninitialized kernel memory around. Because even if we check for errors, some kernel buffers stay around after thge copy (think page cache). However, the x86-64 logic for user copies uses a copy_user_generic() function for all the cases, that set the "zerorest" flag for any fault on the source buffer. Which meant that it didn't just try to clear the kernel buffer after a failure in copy_from_user(), it also tried to clear the destination user buffer for the "copy_in_user()" case. Not only is that pointless, it also means that the clearing code has to worry about the tail clearing taking page faults for the user buffer case. Which is just stupid, since that case shouldn't happen in the first place. Get rid of the whole "zerorest" thing entirely, and instead just check if the destination is in kernel space or not. And then just use memset() to clear the tail of the kernel buffer if necessary. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-09Merge tag 'drm-intel-fixes-2015-04-08' of ↵Dave Airlie
git://anongit.freedesktop.org/drm-intel into drm-fixes three commits, all cc: stable, to address Baytrail suspend/resume issues. * tag 'drm-intel-fixes-2015-04-08' of git://anongit.freedesktop.org/drm-intel: drm/i915/vlv: remove wait for previous GFX clk disable request drm/i915/chv: Remove Wait for a previous gfx force-off drm/i915/vlv: save/restore the power context base reg
2015-04-08ocfs2_file_write_iter: keep return value and current position update in syncAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-08[regression] ocfs2: do *not* increment ->ki_pos twiceAl Viro
generic_file_direct_write() already does that. Broken by "ocfs2: do not fallback to buffer I/O write if appending" Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-04-08ALSA: hda - Fix headphone pin config for Lifebook T731Takashi Iwai
Some BIOS version of Fujitsu Lifebook T731 seems to set up the headphone pin (0x21) without the assoc number 0x0f while it's set only to the output on the docking port (0x1a). With the recent commit [03ad6a8c93b6: ALSA: hda - Fix "PCM" name being used on one DAC when there are two DACs], this resulted in the weird mixer element mapping where the headphone on the laptop is assigned as a shared volume with the speaker and the docking port is assigned as an individual headphone. This patch improves the situation by correcting the headphone pin config to the more appropriate value. Reported-and-tested-by: Taylor Smock <smocktaylor@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-04-08Defer processing of REQ_PREEMPT requests for blocked devicesBart Van Assche
SCSI transport drivers and SCSI LLDs block a SCSI device if the transport layer is not operational. This means that in this state no requests should be processed, even if the REQ_PREEMPT flag has been set. This patch avoids that a rescan shortly after a cable pull sporadically triggers the following kernel oops: BUG: unable to handle kernel paging request at ffffc9001a6bc084 IP: [<ffffffffa04e08f2>] mlx4_ib_post_send+0xd2/0xb30 [mlx4_ib] Process rescan-scsi-bus (pid: 9241, threadinfo ffff88053484a000, task ffff880534aae100) Call Trace: [<ffffffffa0718135>] srp_post_send+0x65/0x70 [ib_srp] [<ffffffffa071b9df>] srp_queuecommand+0x1cf/0x3e0 [ib_srp] [<ffffffffa0001ff1>] scsi_dispatch_cmd+0x101/0x280 [scsi_mod] [<ffffffffa0009ad1>] scsi_request_fn+0x411/0x4d0 [scsi_mod] [<ffffffff81223b37>] __blk_run_queue+0x27/0x30 [<ffffffff8122a8d2>] blk_execute_rq_nowait+0x82/0x110 [<ffffffff8122a9c2>] blk_execute_rq+0x62/0xf0 [<ffffffffa000b0e8>] scsi_execute+0xe8/0x190 [scsi_mod] [<ffffffffa000b2f3>] scsi_execute_req+0xa3/0x130 [scsi_mod] [<ffffffffa000c1aa>] scsi_probe_lun+0x17a/0x450 [scsi_mod] [<ffffffffa000ce86>] scsi_probe_and_add_lun+0x156/0x480 [scsi_mod] [<ffffffffa000dc2f>] __scsi_scan_target+0xdf/0x1f0 [scsi_mod] [<ffffffffa000dfa3>] scsi_scan_host_selected+0x183/0x1c0 [scsi_mod] [<ffffffffa000edfb>] scsi_scan+0xdb/0xe0 [scsi_mod] [<ffffffffa000ee13>] store_scan+0x13/0x20 [scsi_mod] [<ffffffff811c8d9b>] sysfs_write_file+0xcb/0x160 [<ffffffff811589de>] vfs_write+0xce/0x140 [<ffffffff81158b53>] sys_write+0x53/0xa0 [<ffffffff81464592>] system_call_fastpath+0x16/0x1b [<00007f611c9d9300>] 0x7f611c9d92ff Reported-by: Max Gurtuvoy <maxg@mellanox.com> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Cc: <stable@vger.kernel.org> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-04-08be2iscsi: Fix kernel panic when device initialization failsJohn Soni Jose
Kernel panic was happening as iscsi_host_remove() was called on a host which was not yet added. Signed-off-by: John Soni Jose <sony.john-n@emulex.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Cc: <stable@vger.kernel.org> Signed-off-by: James Bottomley <JBottomley@Odin.com>
2015-04-08ALSA: bebob: fix to processing in big-endian machine for sending cueTakashi Sakamoto
Some M-Audio devices require to receive bootup command just after powering on, while codes in BeBoB driver doesn't work properly in big-endian machine because the command should be aligned by little-endian. This commit fixes this bug. This fix should go to stable kernel. Cc: Takayuki Shiroma <t.shiroma.oki@gmail.com> Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-04-08Revert "sparc/PCI: Clip bridge windows to fit in upstream windows"Bjorn Helgaas
This reverts commit d63e2e1f3df904bf6bd150bdafb42ddbb3257ea8. David Ahern reported that d63e2e1f3df9 breaks booting on an 8-socket T5 sparc system. He also verified that the system boots with d63e2e1f3df9 reverted. Yinghai has some fixes, but they need a little more polishing than we can do before v4.0. Link: http://lkml.kernel.org/r/5514391F.2030300@oracle.com # report Link: http://lkml.kernel.org/r/1427857069-6789-1-git-send-email-yinghai@kernel.org # patches Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v3.19+
2015-04-08PCI: Don't look for ACPI hotplug parameters if ACPI is disabledBjorn Helgaas
Booting a v3.18 or newer Xen domU kernel with PCI devices passed through results in an oops (this is a 32-bit 3.13.11 dom0 with a 64-bit 4.4.0 hypervisor and 32-bit domU): BUG: unable to handle kernel paging request at 0030303e IP: [<c06ed0e6>] acpi_ns_validate_handle+0x12/0x1a Call Trace: [<c06eda4d>] ? acpi_evaluate_object+0x31/0x1fc [<c06b78e1>] ? pci_get_hp_params+0x111/0x4e0 [<c0407bc7>] ? xen_force_evtchn_callback+0x17/0x30 [<c04085fb>] ? xen_restore_fl_direct_reloc+0x4/0x4 [<c0699d34>] ? pci_device_add+0x24/0x450 Don't look for ACPI configuration information if ACPI has been disabled. I don't think this is the best fix, because we can boot plain Linux (no Xen) with "acpi=off", and we don't need this check in pci_get_hp_params(). There should be a better fix that would make Xen domU work the same way. The domU kernel has ACPI support but it has no AML. There should be a way to initialize the ACPI data structures so things fail gracefully rather than oopsing. This is an interim fix to address the regression. Fixes: 6cd33649fa83 ("PCI: Add pci_configure_device() during enumeration") Link: https://bugzilla.kernel.org/show_bug.cgi?id=96301 Reported-by: Michael D Labriola <mlabriol@gdeb.com> Tested-by: Michael D Labriola <mlabriol@gdeb.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v3.18+
2015-04-08ALSA: hda/realtek - Make more stable to get pin sense for ALC283Kailang Yang
Pin sense will active when power pin is wake up. Power pin will not wake up immediately during resume state. Add some delay to wait for power pin activated. Signed-off-by: Kailang Yang <kailang@realtek.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-04-08kvm: mmu: lazy collapse small sptes into large sptesWanpeng Li
Dirty logging tracks sptes in 4k granularity, meaning that large sptes have to be split. If live migration is successful, the guest in the source machine will be destroyed and large sptes will be created in the destination. However, the guest continues to run in the source machine (for example if live migration fails), small sptes will remain around and cause bad performance. This patch introduce lazy collapsing of small sptes into large sptes. The rmap will be scanned in ioctl context when dirty logging is stopped, dropping those sptes which can be collapsed into a single large-page spte. Later page faults will create the large-page sptes. Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com> Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com> Message-Id: <1428046825-6905-1-git-send-email-wanpeng.li@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-04-08KVM: x86: Clear CR2 on VCPU resetNadav Amit
CR2 is not cleared as it should after reset. See Intel SDM table named "IA-32 Processor States Following Power-up, Reset, or INIT". Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427933438-12782-5-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-04-08KVM: x86: DR0-DR3 are not clear on resetNadav Amit
DR0-DR3 are not cleared as they should during reset and when they are set from userspace. It appears to be caused by c77fb5fe6f03 ("KVM: x86: Allow the guest to run with dirty debug registers"). Force their reload on these situations. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427933438-12782-4-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-04-08KVM: x86: BSP in MSR_IA32_APICBASE is writableNadav Amit
After reset, the CPU can change the BSP, which will be used upon INIT. Reset should return the BSP which QEMU asked for, and therefore handled accordingly. To quote: "If the MP protocol has completed and a BSP is chosen, subsequent INITs (either to a specific processor or system wide) do not cause the MP protocol to be repeated." [Intel SDM 8.4.2: MP Initialization Protocol Requirements and Restrictions] Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Message-Id: <1427933438-12782-3-git-send-email-namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>