1. 26 Apr, 2019 5 commits
  2. 25 Apr, 2019 2 commits
    • Jonas Karlman's avatar
      drm/bridge: dw-hdmi: fix SCDC configuration for ddc-i2c-bus · c4cba44e
      Jonas Karlman authored
      When ddc-i2c-bus property is used, a NULL pointer dereference is reported:
      
      [   31.041669] Unable to handle kernel NULL pointer dereference at virtual address 00000008
      [   31.041671] pgd = 4d3c16f6
      [   31.041673] [00000008] *pgd=00000000
      [   31.041678] Internal error: Oops: 5 [#1] SMP ARM
      
      [   31.041711] Hardware name: Rockchip (Device Tree)
      [   31.041718] PC is at i2c_transfer+0x8/0xe4
      [   31.041721] LR is at drm_scdc_read+0x54/0x84
      [   31.041723] pc : [<c073273c>]    lr : [<c05926c4>]    psr: 280f0013
      [   31.041725] sp : edffdad0  ip : 5ccb5511  fp : 00000058
      [   31.041727] r10: 00000780  r9 : edf91608  r8 : c11b0f48
      [   31.041728] r7 : 00000438  r6 : 00000000  r5 : 00000000  r4 : 00000000
      [   31.041730] r3 : edffdae7  r2 : 00000002  r1 : edffdaec  r0 : 00000000
      
      [   31.041908] [<c073273c>] (i2c_transfer) from [<c05926c4>] (drm_scdc_read+0x54/0x84)
      [   31.041913] [<c05926c4>] (drm_scdc_read) from [<c0592858>] (drm_scdc_set_scrambling+0x30/0xbc)
      [   31.041919] [<c0592858>] (drm_scdc_set_scrambling) from [<c05cc0f4>] (dw_hdmi_update_power+0x1440/0x1610)
      [   31.041926] [<c05cc0f4>] (dw_hdmi_update_power) from [<c05cc574>] (dw_hdmi_bridge_enable+0x2c/0x70)
      [   31.041932] [<c05cc574>] (dw_hdmi_bridge_enable) from [<c05aed48>] (drm_bridge_enable+0x24/0x34)
      [   31.041938] [<c05aed48>] (drm_bridge_enable) from [<c0591060>] (drm_atomic_helper_commit_modeset_enables+0x114/0x220)
      [   31.041943] [<c0591060>] (drm_atomic_helper_commit_modeset_enables) from [<c05c3fe0>] (rockchip_atomic_helper_commit_tail_rpm+0x28/0x64)
      
      hdmi->i2c may not be set when ddc-i2c-bus property is used in device tree.
      Fix this by using hdmi->ddc as the i2c adapter when calling drm_scdc_*().
      Also report that SCDC is not supported when there is no DDC bus.
      
      Fixes: 264fce6c ("drm/bridge: dw-hdmi: Add SCDC and TMDS Scrambling support")
      Signed-off-by: default avatarJonas Karlman <jonas@kwiboo.se>
      Reviewed-by: default avatarHeiko Stuebner <heiko@sntech.de>
      Reviewed-by: default avatarNeil Armstrong <narmstrong@baylibre.com>
      Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
      Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/VE1PR03MB59031814B5BCAB2152923BDAAC210@VE1PR03MB5903.eurprd03.prod.outlook.com
      c4cba44e
    • Thomas Hellstrom's avatar
      drm/vmwgfx: Fix dma API layer violation · 81103355
      Thomas Hellstrom authored
      Remove the check for IOMMU presence since it was considered a
      layer violation.
      This means we have no reliable way to destinguish between coherent
      hardware IOMMU DMA address translations and incoherent SWIOTLB DMA
      address translations, which we can't handle. So always presume the
      former. This means that if anybody forces SWIOTLB without also setting
      the vmw_force_coherent=1 vmwgfx option, driver operation will fail,
      like it will on most other graphics drivers.
      Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      81103355
  3. 24 Apr, 2019 5 commits
  4. 23 Apr, 2019 3 commits
  5. 21 Apr, 2019 1 commit
  6. 20 Apr, 2019 11 commits
  7. 19 Apr, 2019 13 commits
    • Linus Torvalds's avatar
      Merge branch 'for-5.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu · 4c3f49ae
      Linus Torvalds authored
      Pull percpu fixlet from Dennis Zhou:
       "This stops printing the base address of percpu memory on
        initialization"
      
      * 'for-5.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
        percpu: stop printing kernel addresses
      4c3f49ae
    • Linus Torvalds's avatar
      Merge tag 'tty-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 55e3a6ba
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are five small fixes for some tty/serial/vt issues that have been
        reported.
      
        The vt one has been around for a while, it is good to finally get that
        resolved. The others fix a build warning that showed up in 5.1-rc1,
        and resolve a problem in the sh-sci driver.
      
        Note, the second patch for build warning fix for the sc16is7xx driver
        was just applied to the tree, as it resolves a problem with the
        previous patch to try to solve the issue. It has not shown up in
        linux-next yet, unlike all of the other patches, but it has passed
        0-day testing and everyone seems to agree that it is correct"
      
      * tag 'tty-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        sc16is7xx: put err_spi and err_i2c into correct #ifdef
        vt: fix cursor when clearing the screen
        sc16is7xx: move label 'err_spi' to correct section
        serial: sh-sci: Fix HSCIF RX sampling point adjustment
        serial: sh-sci: Fix HSCIF RX sampling point calculation
      55e3a6ba
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · 3ecafda9
      Linus Torvalds authored
      Merge misc fixes from Andrew Morton:
       "16 fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
        mm/kmemleak.c: fix unused-function warning
        init: initialize jump labels before command line option parsing
        kernel/watchdog_hld.c: hard lockup message should end with a newline
        kcov: improve CONFIG_ARCH_HAS_KCOV help text
        mm: fix inactive list balancing between NUMA nodes and cgroups
        mm/hotplug: treat CMA pages as unmovable
        proc: fixup proc-pid-vm test
        proc: fix map_files test on F29
        mm/vmstat.c: fix /proc/vmstat format for CONFIG_DEBUG_TLBFLUSH=y CONFIG_SMP=n
        mm/memory_hotplug: do not unlock after failing to take the device_hotplug_lock
        mm: swapoff: shmem_unuse() stop eviction without igrab()
        mm: swapoff: take notice of completion sooner
        mm: swapoff: remove too limiting SWAP_UNUSE_MAX_TRIES
        mm: swapoff: shmem_find_swap_entries() filter out other types
        slab: store tagged freelist for off-slab slabmgmt
      3ecafda9
    • Linus Torvalds's avatar
      Merge tag 'staging-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · b222e9af
      Linus Torvalds authored
      Pull staging and IIO fixes from Greg KH:
       "Here is a bunch of IIO driver fixes, and some smaller staging driver
        fixes, for 5.1-rc6. The IIO fixes were delayed due to my vacation, but
        all resolve a number of reported issues and have been in linux-next
        for a few weeks with no reported issues.
      
        The other staging driver fixes are all tiny, resolving some reported
        issues in the comedi and most drivers, as well as some erofs fixes.
      
        All of these patches have been in linux-next with no reported issues"
      
      * tag 'staging-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (24 commits)
        staging: comedi: ni_usb6501: Fix possible double-free of ->usb_rx_buf
        staging: comedi: ni_usb6501: Fix use of uninitialized mutex
        staging: erofs: fix unexpected out-of-bound data access
        staging: comedi: vmk80xx: Fix possible double-free of ->usb_rx_buf
        staging: comedi: vmk80xx: Fix use of uninitialized semaphore
        staging: most: core: use device description as name
        iio: core: fix a possible circular locking dependency
        iio: ad_sigma_delta: select channel when reading register
        iio: pms7003: select IIO_TRIGGERED_BUFFER
        iio: cros_ec: Fix the maths for gyro scale calculation
        iio: adc: xilinx: prevent touching unclocked h/w on remove
        iio: adc: xilinx: fix potential use-after-free on probe
        iio: adc: xilinx: fix potential use-after-free on remove
        iio: dac: mcp4725: add missing powerdown bits in store eeprom
        io: accel: kxcjk1013: restore the range after resume.
        iio:chemical:bme680: Fix SPI read interface
        iio:chemical:bme680: Fix, report temperature in millidegrees
        iio: chemical: fix missing Kconfig block for sgp30
        iio: adc: at91: disable adc channel interrupt in timeout case
        iio: gyro: mpu3050: fix chip ID reading
        ...
      b222e9af
    • Linus Torvalds's avatar
      Merge tag 'char-misc-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · f9764dd4
      Linus Torvalds authored
      Pull char/misc fixes from Greg KH:
       "Here are four small misc driver fixes for 5.1-rc6.
      
        Nothing major at all, they fix up a Kconfig issues, a SPDX invalid
        license tag, and two tiny bugfixes.
      
        All have been in linux-next for a while with no reported issues"
      
      * tag 'char-misc-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        drivers: power: supply: goldfish_battery: Fix bogus SPDX identifier
        extcon: ptn5150: fix COMPILE_TEST dependencies
        misc: fastrpc: add checked value for dma_set_mask
        habanalabs: remove low credit limit of DMA #0
      f9764dd4
    • Ming Lei's avatar
      block: make sure that bvec length can't be overflow · 6bedf00e
      Ming Lei authored
      bvec->bv_offset may be bigger than PAGE_SIZE sometimes, such as,
      when one bio is splitted in the middle of one bvec via bio_split(),
      and bi_iter.bi_bvec_done is used to build offset of the 1st bvec of
      remained bio. And the remained bio's bvec may be re-submitted to fs
      layer via ITER_IBVEC, such as loop and nvme-loop.
      
      So we have to make sure that every bvec's offset is less than
      PAGE_SIZE from bio_for_each_segment_all() because some drivers(loop,
      nvme-loop) passes the splitted bvec to fs layer via ITER_BVEC.
      
      This patch fixes this issue reported by Zhang Yi When running nvme/011.
      
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Yi Zhang <yi.zhang@redhat.com>
      Reported-by: default avatarYi Zhang <yi.zhang@redhat.com>
      Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
      Fixes: 6dc4f100 ("block: allow bio_for_each_segment_all() to iterate over multi-page bvec")
      Signed-off-by: default avatarMing Lei <ming.lei@redhat.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      6bedf00e
    • Hou Tao's avatar
      block: kill all_q_node in request_queue · b40fabc0
      Hou Tao authored
      all_q_node has not been used since commit 4b855ad3 ("blk-mq: Create
      hctx for each present CPU"), so remove it.
      Reviewed-by: default avatarChaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
      Reviewed-by: default avatarMing Lei <ming.lei@redhat.com>
      Signed-off-by: default avatarHou Tao <houtao1@huawei.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      b40fabc0
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input · 240206fc
      Linus Torvalds authored
      Pull input updates from Dmitry Torokhov:
      
       - several new key mappings for HID
      
       - a host of new ACPI IDs used to identify Elan touchpads in Lenovo
         laptops
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
        Input: snvs_pwrkey - initialize necessary driver data before enabling IRQ
        HID: input: add mapping for "Toggle Display" key
        HID: input: add mapping for "Full Screen" key
        HID: input: add mapping for keyboard Brightness Up/Down/Toggle keys
        HID: input: add mapping for Expose/Overview key
        HID: input: fix mapping of aspect ratio key
        [media] doc-rst: switch to new names for Full Screen/Aspect keys
        Input: document meanings of KEY_SCREEN and KEY_ZOOM
        Input: elan_i2c - add hardware ID for multiple Lenovo laptops
      240206fc
    • Hans de Goede's avatar
      x86/cpu/intel: Lower the "ENERGY_PERF_BIAS: Set to normal" message's log priority · 2ee27796
      Hans de Goede authored
      The "ENERGY_PERF_BIAS: Set to 'normal', was 'performance'" message triggers
      on pretty much every Intel machine. The purpose of log messages with
      a warning level is to notify the user of something which potentially is
      a problem, or at least somewhat unexpected.
      
      This message clearly does not match those criteria, so lower its log
      priority from warning to info.
      Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Link: http://lkml.kernel.org/r/20181230172715.17469-1-hdegoede@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
      2ee27796
    • Ingo Molnar's avatar
      Merge tag 'perf-urgent-for-mingo-5.1-20190419' of... · 7579dfc4
      Ingo Molnar authored
      Merge tag 'perf-urgent-for-mingo-5.1-20190419' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
      
      Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
      
      perf top:
      
        Jiri Olsa:
      
        - Fix 'perf top --pid', it needs PERF_SAMPLE_TIME since we switched to using
          a different thread to sort the events and then even for just a single
          thread we now need timestamps.
      
      BPF:
      
        Jiri Olsa:
      
        - Fix bpf_prog and btf lookup functions failure path to to properly return
          NULL.
      
        - Fix side band thread draining, used to process PERF_RECORD_BPF_EVENT
          metadata records.
      
      core:
      
        Jiri Olsa:
      
        - Fix map lookup by name to get a refcount when the name is already in
          the tree. Found
      
        Song Liu:
      
        - Fix __map__is_kmodule() by taking into account recently added BPF
          maps.
      
      UAPI:
      
        Arnaldo Carvalho de Melo:
      
        - Sync sound/asound.h copy
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      7579dfc4
    • Andrea Arcangeli's avatar
      coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping · 04f5866e
      Andrea Arcangeli authored
      The core dumping code has always run without holding the mmap_sem for
      writing, despite that is the only way to ensure that the entire vma
      layout will not change from under it.  Only using some signal
      serialization on the processes belonging to the mm is not nearly enough.
      This was pointed out earlier.  For example in Hugh's post from Jul 2017:
      
        https://lkml.kernel.org/r/alpine.LSU.2.11.1707191716030.2055@eggly.anvils
      
        "Not strictly relevant here, but a related note: I was very surprised
         to discover, only quite recently, how handle_mm_fault() may be called
         without down_read(mmap_sem) - when core dumping. That seems a
         misguided optimization to me, which would also be nice to correct"
      
      In particular because the growsdown and growsup can move the
      vm_start/vm_end the various loops the core dump does around the vma will
      not be consistent if page faults can happen concurrently.
      
      Pretty much all users calling mmget_not_zero()/get_task_mm() and then
      taking the mmap_sem had the potential to introduce unexpected side
      effects in the core dumping code.
      
      Adding mmap_sem for writing around the ->core_dump invocation is a
      viable long term fix, but it requires removing all copy user and page
      faults and to replace them with get_dump_page() for all binary formats
      which is not suitable as a short term fix.
      
      For the time being this solution manually covers the places that can
      confuse the core dump either by altering the vma layout or the vma flags
      while it runs.  Once ->core_dump runs under mmap_sem for writing the
      function mmget_still_valid() can be dropped.
      
      Allowing mmap_sem protected sections to run in parallel with the
      coredump provides some minor parallelism advantage to the swapoff code
      (which seems to be safe enough by never mangling any vma field and can
      keep doing swapins in parallel to the core dumping) and to some other
      corner case.
      
      In order to facilitate the backporting I added "Fixes: 86039bd3"
      however the side effect of this same race condition in /proc/pid/mem
      should be reproducible since before 2.6.12-rc2 so I couldn't add any
      other "Fixes:" because there's no hash beyond the git genesis commit.
      
      Because find_extend_vma() is the only location outside of the process
      context that could modify the "mm" structures under mmap_sem for
      reading, by adding the mmget_still_valid() check to it, all other cases
      that take the mmap_sem for reading don't need the new check after
      mmget_not_zero()/get_task_mm().  The expand_stack() in page fault
      context also doesn't need the new check, because all tasks under core
      dumping are frozen.
      
      Link: http://lkml.kernel.org/r/20190325224949.11068-1-aarcange@redhat.com
      Fixes: 86039bd3 ("userfaultfd: add new syscall to provide memory externalization")
      Signed-off-by: default avatarAndrea Arcangeli <aarcange@redhat.com>
      Reported-by: default avatarJann Horn <jannh@google.com>
      Suggested-by: default avatarOleg Nesterov <oleg@redhat.com>
      Acked-by: default avatarPeter Xu <peterx@redhat.com>
      Reviewed-by: default avatarMike Rapoport <rppt@linux.ibm.com>
      Reviewed-by: default avatarOleg Nesterov <oleg@redhat.com>
      Reviewed-by: default avatarJann Horn <jannh@google.com>
      Acked-by: default avatarJason Gunthorpe <jgg@mellanox.com>
      Acked-by: default avatarMichal Hocko <mhocko@suse.com>
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      04f5866e
    • Arnd Bergmann's avatar
      mm/kmemleak.c: fix unused-function warning · dce5b0bd
      Arnd Bergmann authored
      The only references outside of the #ifdef have been removed, so now we
      get a warning in non-SMP configurations:
      
        mm/kmemleak.c:1404:13: error: unused function 'scan_large_block' [-Werror,-Wunused-function]
      
      Add a new #ifdef around it.
      
      Link: http://lkml.kernel.org/r/20190416123148.3502045-1-arnd@arndb.de
      Fixes: 298a32b1 ("kmemleak: powerpc: skip scanning holes in the .bss section")
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
      Cc: Michael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      dce5b0bd
    • Dan Williams's avatar
      init: initialize jump labels before command line option parsing · 6041186a
      Dan Williams authored
      When a module option, or core kernel argument, toggles a static-key it
      requires jump labels to be initialized early.  While x86, PowerPC, and
      ARM64 arrange for jump_label_init() to be called before parse_args(),
      ARM does not.
      
        Kernel command line: rdinit=/sbin/init page_alloc.shuffle=1 panic=-1 console=ttyAMA0,115200 page_alloc.shuffle=1
        ------------[ cut here ]------------
        WARNING: CPU: 0 PID: 0 at ./include/linux/jump_label.h:303
        page_alloc_shuffle+0x12c/0x1ac
        static_key_enable(): static key 'page_alloc_shuffle_key+0x0/0x4' used
        before call to jump_label_init()
        Modules linked in:
        CPU: 0 PID: 0 Comm: swapper Not tainted
        5.1.0-rc4-next-20190410-00003-g3367c36ce744 #1
        Hardware name: ARM Integrator/CP (Device Tree)
        [<c0011c68>] (unwind_backtrace) from [<c000ec48>] (show_stack+0x10/0x18)
        [<c000ec48>] (show_stack) from [<c07e9710>] (dump_stack+0x18/0x24)
        [<c07e9710>] (dump_stack) from [<c001bb1c>] (__warn+0xe0/0x108)
        [<c001bb1c>] (__warn) from [<c001bb88>] (warn_slowpath_fmt+0x44/0x6c)
        [<c001bb88>] (warn_slowpath_fmt) from [<c0b0c4a8>]
        (page_alloc_shuffle+0x12c/0x1ac)
        [<c0b0c4a8>] (page_alloc_shuffle) from [<c0b0c550>] (shuffle_store+0x28/0x48)
        [<c0b0c550>] (shuffle_store) from [<c003e6a0>] (parse_args+0x1f4/0x350)
        [<c003e6a0>] (parse_args) from [<c0ac3c00>] (start_kernel+0x1c0/0x488)
      
      Move the fallback call to jump_label_init() to occur before
      parse_args().
      
      The redundant calls to jump_label_init() in other archs are left intact
      in case they have static key toggling use cases that are even earlier
      than option parsing.
      
      Link: http://lkml.kernel.org/r/155544804466.1032396.13418949511615676665.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: default avatarDan Williams <dan.j.williams@intel.com>
      Reported-by: default avatarGuenter Roeck <groeck@google.com>
      Reviewed-by: default avatarKees Cook <keescook@chromium.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Mike Rapoport <rppt@linux.ibm.com>
      Cc: Russell King <rmk@armlinux.org.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      6041186a