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2015-03-25drivers: base: memory: Use tabs instead of spacesIoana Ciornei
This patch changes spaces to tabs. Found using checkpatch.pl Signed-off-by: Ioana Ciornei <ciorneiioana@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25firmware_class: Fix whitespace and indentationAndrei Oprea
Fix checkpatch.pl issues with coding style. Removed whitespace and fixed indentation Signed-off-by: Andrei Oprea <andrei.br92@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25drivers: base: dma-mapping: Erase blank space after pointerMarius Cristian Eseanu
This patch fixes the following checkpatch.pl error: ERROR: "foo * bar" should be "foo *bar" Signed-off-by: Marius Cristian Eseanu <eseanu.cristian@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25drivers: base: class: Add a blank line after declarationsCosmin Tomulescu
This patch fixes the following warning found by checkpatch.pl: WARNING: Missing a black line after declarations Signed-off-by: Cosmin Tomulescu <cosmintom@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25attribute_container: fix missing blank lines after declarationsCosmin Dragomir
Found with checkpatch.pl Signed-off-by: Cosmin Dragomir <cosmin.gabriel.dragomir@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25drivers: base: memory: Fix switch indentIoana Ciornei
Signed-off-by: Ioana Ciornei <ciorneiioana@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25drivers: base: map: Use kmalloc_array instead of kmallocAndrei Poenaru
Reported by checkpatch.pl While at it, removed blank line between function call and error checking. Signed-off-by: Andrei Poenaru <andreigpoenaru@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25Driver core: Fix missing whitespace in function argumentFlorin Papa
Found this using checkpatch.pl. Signed-off-by: Florin Papa <florin.papa192@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25driver core: Delete an unnecessary check before the function call "put_device"Markus Elfring
The put_device() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25drivers/base/node: clean up attribute group conversionGreg Kroah-Hartman
We can use the ATTRIBUTE_GROUPS() macro here, so use it, saving some lines of code. Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
2015-03-25drivers/base/node: Avoid manual device_create_file() callsTakashi Iwai
Instead of manual calls of multiple device_create_file() and device_remove_file(), use the static attribute groups assigned to the new device. This also fixes the possible races, too. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25samples/kobject: be explicit in the module licenseGreg Kroah-Hartman
Rusty pointed out that the module license should be "GPL v2" to properly match the notice at the top of the files, so make that change. Reported-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25samples/kobject: Use kstrtoint instead of sscanfRastislav Barlik
Use kstrtoint function instead of sscanf and check for return values. Signed-off-by: Rastislav Barlik <barlik@zoho.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25driver core: bus: Goto appropriate labels on failure in bus_add_deviceJunjie Mao
It is not necessary to call device_remove_groups() when device_add_groups() fails. The group added by device_add_groups() should be removed if sysfs_create_link() fails. Fixes: fa6fdb33b486 ("driver core: bus_type: add dev_groups") Signed-off-by: Junjie Mao <junjie_mao@yeah.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25driver core: use *switch* statement in really_probe()Sergei Shtylyov
There are series of comparisons of the 'ret' variable on the failure path of really_probe(), so the *switch* statement seems more appropriate there. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25sysfs: Document struct attribute_groupGuenter Roeck
Document variables defined in struct attribute_group to ensure correct usage. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25sysfs: Only accept read/write permissions for file attributesVivien Didelot
For sysfs file attributes, only read and write permissions make sense. Mask provided attribute permissions accordingly and send a warning to the console if invalid permission bits are set. This patch is originally from Guenter [1] and includes the fixup explained in the thread, that is printing permissions in octal format and limiting the scope of attributes to SYSFS_PREALLOC | 0664. [1] https://lkml.org/lkml/2015/1/19/599 Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25sysfs: Use only return value from is_visible for the file modeGuenter Roeck
Up to now, is_visible can only be used to either remove visibility of a file entirely or to add permissions, but not to reduce permissions. This makes it impossible, for example, to use DEVICE_ATTR_RW to define file attributes and reduce permissions to read-only. This behavior is undesirable and unnecessarily complicates code which needs to reduce permissions; instead of just returning the desired permissions, it has to ensure that the permissions in the attribute variable declaration only reflect the minimal permissions ever needed. Change semantics of is_visible to only use the permissions returned from it instead of oring the returned value with the hard-coded permissions. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-22Linux 4.0-rc5v4.0-rc5Linus Torvalds
2015-03-22Merge tag 'md/4.0-rc4-fix' of git://neil.brown.name/mdLinus Torvalds
Pull bugfix for md from Neil Brown: "One fix for md in 4.0-rc4 Regression in recent patch causes crash on error path" * tag 'md/4.0-rc4-fix' of git://neil.brown.name/md: md: fix problems with freeing private data after ->run failure.
2015-03-22Merge tag 'driver-core-4.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core fixes from Greg KH: "Here are two bugfixes for things reported. One regression in kernfs, and another issue fixed in the LZ4 code that was fixed in the "upstream" codebase that solves a reported kernel crash Both have been in linux-next for a while" * tag 'driver-core-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: LZ4 : fix the data abort issue kernfs: handle poll correctly on 'direct_read' files.
2015-03-22Merge tag 'char-misc-4.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc fixes from Greg KH: "Here are three fixes for 4.0-rc5 that revert 3 PCMCIA patches that were merged in 4.0-rc1 that cause regressions. So let's revert them for now and they will be reworked and resent sometime in the future. All have been tested in linux-next for a while" * tag 'char-misc-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: Revert "pcmcia: add a new resource manager for non ISA systems" Revert "pcmcia: fix incorrect bracketing on a test" Revert "pcmcia: add missing include for new pci resource handler"
2015-03-22Merge tag 'staging-4.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging driver fixes from Greg KH: "Here are four small staging driver fixes, all for the vt6656 and vt6655 drivers, that resolve some reported issues with them. All of these patches have been in linux next for a while" * tag 'staging-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: vt6655: Fix late setting of byRFType. vt6655: RFbSetPower fix missing rate RATE_12M staging: vt6656: vnt_rf_setpower: fix missing rate RATE_12M staging: vt6655: vnt_tx_packet fix dma_idx selection.
2015-03-22Merge tag 'tty-4.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver fix from Greg KH: "Here's a single 8250 serial driver that fixes a reported deadlock with the serial console and the tty driver. It's been in linux-next for a while now" * tag 'tty-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: serial: 8250_dw: Fix deadlock in LCR workaround
2015-03-22Merge tag 'usb-4.0-rc5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB / PHY driver fixes from Greg KH: "Here's a number of USB and PHY driver fixes for 4.0-rc5. The largest thing here is a revert of a gadget function driver patch that removes 500 lines of code. Other than that, it's a number of reported bugs fixes and new quirk/id entries. All have been in linux-next for a while" * tag 'usb-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (33 commits) usb: common: otg-fsm: only signal connect after switching to peripheral uas: Add US_FL_NO_ATA_1X for Initio Corporation controllers / devices USB: ehci-atmel: rework clk handling MAINTAINERS: add entry for USB OTG FSM usb: chipidea: otg: add a_alt_hnp_support response for B device phy: omap-usb2: Fix missing clk_prepare call when using old dt name phy: ti/omap: Fix modalias phy: core: Fixup return value of phy_exit when !pm_runtime_enabled phy: miphy28lp: Convert to devm_kcalloc and fix wrong sizof phy: miphy365x: Convert to devm_kcalloc and fix wrong sizeof phy: twl4030-usb: Remove redundant assignment for twl->linkstat phy: exynos5-usbdrd: Fix off-by-one valid value checking for args->args[0] phy: Find the right match in devm_phy_destroy() phy: rockchip-usb: Fixup rockchip_usb_phy_power_on failure path phy: ti-pipe3: Simplify ti_pipe3_dpll_wait_lock implementation phy: samsung-usb2: Remove NULL terminating entry from phys array phy: hix5hd2-sata: Check return value of platform_get_resource phy: exynos-dp-video: Kill exynos_dp_video_phy_pwr_isol function Revert "usb: gadget: zero: Add support for interrupt EP" Revert "xhci: Clear the host side toggle manually when endpoint is 'soft reset'" ...
2015-03-21Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull slave dmaengine fixes from Vinod Koul: "Four fixes for dw, pl08x, imx-sdma and at_hdmac driver. Nothing unusual here, simple fixes to these drivers" * 'fixes' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: pl08x: Define capabilities for generic capabilities reporting dmaengine: dw: append MODULE_ALIAS for platform driver dmaengine: imx-sdma: switch to dynamic context mode after script loaded dmaengine: at_hdmac: Fix calculation of the residual bytes
2015-03-21Merge tag 'pm+acpi-4.0-rc5' 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 fixes for recent regressions (PCI/ACPI resources and at91 RTC locking), a stable-candidate powercap RAPL driver fix and two ARM cpuidle fixes (one stable-candidate too). Specifics: - Revert a recent PCI commit related to IRQ resources management that introduced a regression for drivers attempting to bind to devices whose previous drivers did not balance pci_enable_device() and pci_disable_device() as expected (Rafael J Wysocki). - Fix a deadlock in at91_rtc_interrupt() introduced by a typo in a recent commit related to wakeup interrupt handling (Dan Carpenter). - Allow the power capping RAPL (Running-Average Power Limit) driver to use different energy units for domains within one CPU package which is necessary to handle Intel Haswell EP processors correctly (Jacob Pan). - Improve the cpuidle mvebu driver's handling of Armada XP SoCs by updating the target residency and exit latency numbers for those chips (Sebastien Rannou). - Prevent the cpuidle mvebu driver from calling cpu_pm_enter() twice in a row before cpu_pm_exit() is called on the same CPU which breaks the core's assumptions regarding the usage of those functions (Gregory Clement)" * tag 'pm+acpi-4.0-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: Revert "x86/PCI: Refine the way to release PCI IRQ resources" rtc: at91rm9200: double locking bug in at91_rtc_interrupt() powercap / RAPL: handle domains with different energy units cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs cpuidle: mvebu: Fix the CPU PM notifier usage
2015-03-21Merge git://people.freedesktop.org/~airlied/linuxLinus Torvalds
Pull drm updates from Dave Airlie: "A bunch of fixes across drivers: radeon: disable two ended allocation for now, it breaks some stuff amdkfd: misc fixes nouveau: fix irq loop problem, add basic support for GM206 (new hw) i915: fix some WARNs people were seeing exynos: fix some iommu interactions causing boot failures" * git://people.freedesktop.org/~airlied/linux: drm/radeon: drop ttm two ended allocation drm/exynos: fix the initialization order in FIMD drm/exynos: fix typo config name correctly. drm/exynos: Check for NULL dereference of crtc drm/exynos: IS_ERR() vs NULL bug drm/exynos: remove unused files drm/i915: Make sure the primary plane is enabled before reading out the fb state drm/nouveau/bios: fix i2c table parsing for dcb 4.1 drm/nouveau/device/gm100: Basic GM206 bring up (as copy of GM204) drm/nouveau/device: post write to NV_PMC_BOOT_1 when flipping endian switch drm/nouveau/gr/gf100: fix some accidental or'ing of buffer addresses drm/nouveau/fifo/nv04: remove the loop from the interrupt handler drm/radeon: Changing number of compute pipe lines drm/amdkfd: Fix SDMA queue init. in non-HWS mode drm/amdkfd: destroy mqd when destroying kernel queue drm/i915: Ensure plane->state->fb stays in sync with plane->fb
2015-03-21Merge tag 'devicetree-fixes-for-4.0-part2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull more DeviceTree fixes vfom Rob Herring: - revert setting stdout-path as preferred console. This caused regressions in PowerMACs and other systems. - yet another fix for stdout-path option parsing. - fix error path handling in of_irq_parse_one * tag 'devicetree-fixes-for-4.0-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: Revert "of: Fix premature bootconsole disable with 'stdout-path'" of: handle both '/' and ':' in path strings of: unittest: Add option string test case with longer path of/irq: Fix of_irq_parse_one() returned error codes
2015-03-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pendingLinus Torvalds
Pull SCSI target fixes from Nicholas Bellinger: "Here are current target-pending fixes for v4.0-rc5 code that have made their way into the queue over the last weeks. The fixes this round include: - Fix long-standing iser-target logout bug related to early conn_logout_comp completion, resulting in iscsi_conn use-after-tree OOpsen. (Sagi + nab) - Fix long-standing tcm_fc bug in ft_invl_hw_context() failure handing for DDP hw offload. (DanC) - Fix incorrect use of unprotected __transport_register_session() in tcm_qla2xxx + other single local se_node_acl fabrics. (Bart) - Fix reference leak in target_submit_cmd() -> target_get_sess_cmd() for ack_kref=1 failure path. (Bart) - Fix pSCSI backend ->get_device_type() statistics OOPs with un-configured device. (Olaf + nab) - Fix virtual LUN=0 target_configure_device failure OOPs at modprobe time. (Claudio + nab) - Fix FUA write false positive failure regression in v4.0-rc1 code. (Christophe Vu-Brugier + HCH)" * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: target: do not reject FUA CDBs when write cache is enabled but emulate_write_cache is 0 target: Fix virtual LUN=0 target_configure_device failure OOPs target/pscsi: Fix NULL pointer dereference in get_device_type tcm_fc: missing curly braces in ft_invl_hw_context() target: Fix reference leak in target_get_sess_cmd() error path loop/usb/vhost-scsi/xen-scsiback: Fix use of __transport_register_session tcm_qla2xxx: Fix incorrect use of __transport_register_session iscsi-target: Avoid early conn_logout_comp for iser connections Revert "iscsi-target: Avoid IN_LOGOUT failure case for iser-target" target: Disallow changing of WRITE cache/FUA attrs after export
2015-03-21Merge tag 'dm-4.0-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull devicemapper fixes from Mike Snitzer: "A handful of stable fixes for DM: - fix thin target to always zero-fill reads to unprovisioned blocks - fix to interlock device destruction's suspend from internal suspends - fix 2 snapshot exception store handover bugs - fix dm-io to cope with DISCARD and WRITE_SAME capabilities changing" * tag 'dm-4.0-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm io: deal with wandering queue limits when handling REQ_DISCARD and REQ_WRITE_SAME dm snapshot: suspend merging snapshot when doing exception handover dm snapshot: suspend origin when doing exception handover dm: hold suspend_lock while suspending device during device deletion dm thin: fix to consistently zero-fill reads to unprovisioned blocks
2015-03-21Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs fixes from Chris Mason: "Most of these are fixing extent reservation accounting, or corners with tree writeback during commit. Josef's set does add a test, which isn't strictly a fix, but it'll keep us from making this same mistake again" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: fix outstanding_extents accounting in DIO Btrfs: add sanity test for outstanding_extents accounting Btrfs: just free dummy extent buffers Btrfs: account merges/splits properly Btrfs: prepare block group cache before writing Btrfs: fix ASSERT(list_empty(&cur_trans->dirty_bgs_list) Btrfs: account for the correct number of extents for delalloc reservations Btrfs: fix merge delalloc logic Btrfs: fix comp_oper to get right order Btrfs: catch transaction abortion after waiting for it btrfs: fix sizeof format specifier in btrfs_check_super_valid()
2015-03-21Merge branch 'for-4.0' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
Pull nfsd bufix from Bruce Fields: "This is a fix for a crash easily triggered by 4.1 activity to a server built with CONFIG_NFSD_PNFS. There are some more bugfixes queued up that I intend to pass along next week, but this is the most critical" * 'for-4.0' of git://linux-nfs.org/~bfields/linux: Subject: nfsd: don't recursively call nfsd4_cb_layout_fail
2015-03-21Merge tag 'upstream-4.0-rc5' of git://git.infradead.org/linux-ubifsLinus Torvalds
Pull UBI fix from Artem Bityutskiy: "This fixes a bug introduced during the v4.0 merge window where we forgot to put braces where they should be" * tag 'upstream-4.0-rc5' of git://git.infradead.org/linux-ubifs: UBI: fix missing brace control flow
2015-03-21Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - mm switching fix where the kernel pgd ends up in the user TTBR0 after returning from an EFI run-time services call - fix __GFP_ZERO handling for atomic pool and CMA DMA allocations (the generic code does get the gfp flags, so it's left with the arch code to memzero accordingly) * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: Honor __GFP_ZERO in dma allocations arm64: efi: don't restore TTBR0 if active_mm points at init_mm
2015-03-21Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds
Pull ARM fixes from Russell King: "Another few ARM fixes. Fabrice fixed the L2 cache DT parsing to allow prefetch configuration to be specified even when the cache size parsing fails. Laura noticed that the setting of page attributes wasn't working for modules due to is_module_addr() always returning false. Marc Gonzalez (aka Mason) noticed a potential latent bug with the way we read one of the CPUID registers (where we could attempt to read a non-present CPUID register which may fault.) I've fixed an issue where 32-bit DMA masks were failing with memory which extended to the top of physical address space, and I've also added debugging output of the page tables when we hit a data access exception which we don't specifically handle - prompted by the lack of information in a bug report" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 8313/1: Use read_cpuid_ext() macro instead of inline asm ARM: 8311/1: Don't use is_module_addr in setting page attributes ARM: 8310/1: l2c: Fix prefetch settings dt parsing ARM: dump pgd, pmd and pte states on unhandled data abort faults ARM: dma-api: fix off-by-one error in __dma_supported()
2015-03-21Merge branches 'pm-cpuidle', 'powercap', 'irq-pm' and 'acpi-resources'Rafael J. Wysocki
* pm-cpuidle: cpuidle: mvebu: Update cpuidle thresholds for Armada XP SOCs cpuidle: mvebu: Fix the CPU PM notifier usage * powercap: powercap / RAPL: handle domains with different energy units * irq-pm: rtc: at91rm9200: double locking bug in at91_rtc_interrupt() * acpi-resources: Revert "x86/PCI: Refine the way to release PCI IRQ resources"
2015-03-21md: fix problems with freeing private data after ->run failure.NeilBrown
If ->run() fails, it can either free the data structures it allocated, or leave that task to ->free() which will be called on failures. However: md.c calls ->free() even if ->private_data is NULL, which causes problems in some personalities. raid0.c frees the data, but doesn't clear ->private_data, which will become a problem when we fix md.c So better fix both these issues at once. Reported-by: Richard W.M. Jones <rjones@redhat.com> Fixes: 5aa61f427e4979be733e4847b9199ff9cc48a47e URL: https://bugzilla.kernel.org/show_bug.cgi?id=94381 Signed-off-by: NeilBrown <neilb@suse.de>
2015-03-20arm64: Honor __GFP_ZERO in dma allocationsSuzuki K. Poulose
Current implementation doesn't zero out the pages allocated. Honor the __GFP_ZERO flag and zero out if set. Cc: <stable@vger.kernel.org> # v3.14+ Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-20arm64: efi: don't restore TTBR0 if active_mm points at init_mmWill Deacon
init_mm isn't a normal mm: it has swapper_pg_dir as its pgd (which contains kernel mappings) and is used as the active_mm for the idle thread. When restoring the pgd after an EFI call, we write current->active_mm into TTBR0. If the current task is actually the idle thread (e.g. when initialising the EFI RTC before entering userspace), then the TLB can erroneously populate itself with junk global entries as a result of speculative table walks. When we do eventually return to userspace, the task can end up hitting these junk mappings leading to lockups, corruption or crashes. This patch fixes the problem in the same way as the CPU suspend code by ensuring that we never switch to the init_mm in efi_set_pgd and instead point TTBR0 at the zero page. A check is also added to cpu_switch_mm to BUG if we get passed swapper_pg_dir. Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Fixes: f3cdfd239da5 ("arm64/efi: move SetVirtualAddressMap() to UEFI stub") Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-03-20Revert "x86/PCI: Refine the way to release PCI IRQ resources"Rafael J. Wysocki
Commit b4b55cda5874 (Refine the way to release PCI IRQ resources) introduced a regression in the PCI IRQ resource management by causing the IRQ resource of a device, established when pci_enabled_device() is called on a fully disabled device, to be released when the driver is unbound from the device, regardless of the enable_cnt. This leads to the situation that an ill-behaved driver can now make a device unusable to subsequent drivers by an imbalance in their use of pci_enable/disable_device(). That is a serious problem for secondary drivers like vfio-pci, which are innocent of the transgressions of the previous driver. Since the solution of this problem is not immediate and requires further discussion, revert commit b4b55cda5874 and the issue it was supposed to address (a bug related to xen-pciback) will be taken care of in a different way going forward. Reported-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-20Merge tag 'drm-intel-fixes-2015-03-19' of ↵Dave Airlie
git://anongit.freedesktop.org/drm-intel into drm-fixes Backporting a couple of plane related fixes from drm-next to v4.0. * tag 'drm-intel-fixes-2015-03-19' of git://anongit.freedesktop.org/drm-intel: drm/i915: Make sure the primary plane is enabled before reading out the fb state drm/i915: Ensure plane->state->fb stays in sync with plane->fb
2015-03-20Merge tag 'drm-amdkfd-fixes-2015-03-19' of ↵Dave Airlie
git://people.freedesktop.org/~gabbayo/linux into drm-fixes - Fixing SDMA initialization when in non-HWS mode (debug mode) - Memory leak fix when destroying kernel queue - Fix number of available compute pipelines according to new firmware * tag 'drm-amdkfd-fixes-2015-03-19' of git://people.freedesktop.org/~gabbayo/linux: drm/radeon: Changing number of compute pipe lines drm/amdkfd: Fix SDMA queue init. in non-HWS mode drm/amdkfd: destroy mqd when destroying kernel queue
2015-03-19target: do not reject FUA CDBs when write cache is enabled but ↵Christophe Vu-Brugier
emulate_write_cache is 0 A check that rejects a CDB with FUA bit set if no write cache is emulated was added by the following commit: fde9f50 target: Add sanity checks for DPO/FUA bit usage The condition is as follows: if (!dev->dev_attrib.emulate_fua_write || !dev->dev_attrib.emulate_write_cache) However, this check is wrong if the backend device supports WCE but "emulate_write_cache" is disabled. This patch uses se_dev_check_wce() (previously named spc_check_dev_wce) to invoke transport->get_write_cache() if the device has a write cache or check the "emulate_write_cache" attribute otherwise. Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-03-19target: Fix virtual LUN=0 target_configure_device failure OOPsNicholas Bellinger
This patch fixes a NULL pointer dereference triggered by a late target_configure_device() -> alloc_workqueue() failure that results in target_free_device() being called with DF_CONFIGURED already set, which subsequently OOPses in destroy_workqueue() code. Currently this only happens at modprobe target_core_mod time when core_dev_setup_virtual_lun0() -> target_configure_device() fails, and the explicit target_free_device() gets called. To address this bug originally introduced by commit 0fd97ccf45, go ahead and move DF_CONFIGURED to end of target_configure_device() code to handle this special failure case. Reported-by: Claudio Fleiner <cmf@daterainc.com> Cc: Claudio Fleiner <cmf@daterainc.com> Cc: Christoph Hellwig <hch@lst.de> Cc: <stable@vger.kernel.org> # v3.7+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-03-19target/pscsi: Fix NULL pointer dereference in get_device_typeNicholas Bellinger
This patch fixes a NULL pointer dereference OOPs with pSCSI backends within target_core_stat.c code. The bug is caused by a configfs attr read if no pscsi_dev_virt->pdv_sd has been configured. Reported-by: Olaf Hering <olaf@aepfle.de> Cc: <stable@vger.kernel.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-03-19tcm_fc: missing curly braces in ft_invl_hw_context()Dan Carpenter
This patch adds a missing set of conditional check braces in ft_invl_hw_context() originally introduced by commit dcd998ccd when handling DDP failures in ft_recv_write_data() code. commit dcd998ccdbf74a7d8fe0f0a44e85da1ed5975946 Author: Kiran Patil <kiran.patil@intel.com> Date: Wed Aug 3 09:20:01 2011 +0000 tcm_fc: Handle DDP/SW fc_frame_payload_get failures in ft_recv_write_data Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Kiran Patil <kiran.patil@intel.com> Cc: <stable@vger.kernel.org> # 3.1+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-03-19target: Fix reference leak in target_get_sess_cmd() error pathBart Van Assche
This patch fixes a se_cmd->cmd_kref leak buf when se_sess->sess_tearing_down is true within target_get_sess_cmd() submission path code. This se_cmd reference leak can occur during active session shutdown when ack_kref=1 is passed by target_submit_cmd_[map_sgls,tmr]() callers. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: <stable@vger.kernel.org> # 3.6+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-03-19loop/usb/vhost-scsi/xen-scsiback: Fix use of __transport_register_sessionBart Van Assche
This patch changes loopback, usb-gadget, vhost-scsi and xen-scsiback fabric code to invoke transport_register_session() instead of the unprotected flavour, to ensure se_tpg->session_lock is taken when adding new session list nodes to se_tpg->tpg_sess_list. Note that since these four fabric drivers already hold their own internal TPG mutexes when accessing se_tpg->tpg_sess_list, and consist of a single se_session created through configfs attribute access, no list corruption can currently occur. So for correctness sake, go ahead and use the se_tpg->session_lock protected version for these four fabric drivers. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-03-19tcm_qla2xxx: Fix incorrect use of __transport_register_sessionBart Van Assche
This patch fixes the incorrect use of __transport_register_session() in tcm_qla2xxx_check_initiator_node_acl() code, that does not perform explicit se_tpg->session_lock when accessing se_tpg->tpg_sess_list to add new se_sess nodes. Given that tcm_qla2xxx_check_initiator_node_acl() is not called with qla_hw->hardware_lock held for all accesses of ->tpg_sess_list, the code should be using transport_register_session() instead. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: <stable@vger.kernel.org> # 3.5+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>