1. 04 Dec, 2016 1 commit
  2. 27 Nov, 2016 5 commits
  3. 26 Nov, 2016 17 commits
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · e3480312
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "Here is a revert and two bugfixes for the I2C designware driver.
      
        Please note that we are still hunting down a regression for the
        i2c-octeon driver. While there is a fix pending, we have unclear
        feedback from the testers currently. An rc8 would be quite helpful
        for this case"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        Revert "i2c: designware: do not disable adapter after transfer"
        i2c: designware: fix rx fifo depth tracking
        i2c: designware: report short transfers
      e3480312
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm · a56f3eb2
      Linus Torvalds authored
      Pull ARM fix from Russell King:
       "This resolves the ksyms issues by reverting the commit which
        introduced the breakage"
      
      There was what I consider to be a better fix, but it's late in the rc
      game, so I'll take the revert.
      
      * 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
        Revert "arm: move exports to definitions"
      a56f3eb2
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · a0d60e62
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Fix leak in fsl/fman driver, from Dan Carpenter.
      
       2) Call flow dissector initcall earlier than any networking driver can
          register and start to use it, from Eric Dumazet.
      
       3) Some dup header fixes from Geliang Tang.
      
       4) TIPC link monitoring compat fix from Jon Paul Maloy.
      
       5) Link changes require EEE re-negotiation in bcm_sf2 driver, from
          Florian Fainelli.
      
       6) Fix bogus handle ID passed into tfilter_notify_chain(), from Roman
          Mashak.
      
       7) Fix dump size calculation in rtnl_calcit(), from Zhang Shengju.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
        tipc: resolve connection flow control compatibility problem
        mvpp2: use correct size for memset
        net/mlx5: drop duplicate header delay.h
        net: ieee802154: drop duplicate header delay.h
        ibmvnic: drop duplicate header seq_file.h
        fsl/fman: fix a leak in tgec_free()
        net: ethtool: don't require CAP_NET_ADMIN for ETHTOOL_GLINKSETTINGS
        tipc: improve sanity check for received domain records
        tipc: fix compatibility bug in link monitoring
        net: ethernet: mvneta: Remove IFF_UNICAST_FLT which is not implemented
        dwc_eth_qos: drop duplicate headers
        net sched filters: fix filter handle ID in tfilter_notify_chain()
        net: dsa: bcm_sf2: Ensure we re-negotiate EEE during after link change
        bnxt: do not busy-poll when link is down
        udplite: call proper backlog handlers
        ipv6: bump genid when the IFA_F_TENTATIVE flag is clear
        net/mlx4_en: Free netdev resources under state lock
        net: revert "net: l2tp: Treat NET_XMIT_CN as success in l2tp_eth_dev_xmit"
        rtnetlink: fix the wrong minimal dump size getting from rtnl_calcit()
        bnxt_en: Fix a VXLAN vs GENEVE issue
        ...
      a0d60e62
    • Linus Torvalds's avatar
      Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm · 30e2b7cf
      Linus Torvalds authored
      Pull libnvdimm fixes from Dan Williams:
      
       - Fix a crash that occurs at driver initialization if the memory region
         is already busy (request_mem_region() fails).
      
       - Fix a vma validation check that mistakenly allows a private device-
         dax mapping to be established. Device-dax explicitly forbids private
         mappings so it can guarantee a given fault granularity and backing
         memory type.
      
       Both of these fixes have soaked in -next and are tagged for -stable.
      
      * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
        device-dax: fail all private mapping attempts
        device-dax: check devm_nsio_enable() return value
      30e2b7cf
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · fc13ca19
      Linus Torvalds authored
      Pull KVM fixes from Radim Krčmář:
       "Four fixes for bugs found by syzkaller on x86, all for stable"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: x86: check for pic and ioapic presence before use
        KVM: x86: fix out-of-bounds accesses of rtc_eoi map
        KVM: x86: drop error recovery in em_jmp_far and em_ret_far
        KVM: x86: fix out-of-bounds access in lapic
      fc13ca19
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 39c15737
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "Fixes marked for stable:
         - Set missing wakeup bit in LPCR on POWER9
         - Fix the early OPAL console wrappers
         - Fixup kernel read only mapping
      
        Fixes for code merged this cycle:
         - Fix missing CRCs, add more asm-prototypes.h declarations"
      
      * tag 'powerpc-4.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/mm: Fixup kernel read only mapping
        powerpc/boot: Fix the early OPAL console wrappers
        powerpc: Fix missing CRCs, add more asm-prototypes.h declarations
        powerpc: Set missing wakeup bit in LPCR on POWER9
      39c15737
    • Jon Paul Maloy's avatar
      tipc: resolve connection flow control compatibility problem · 6998cc6e
      Jon Paul Maloy authored
      In commit 10724cc7 ("tipc: redesign connection-level flow control")
      we replaced the previous message based flow control with one based on
      1k blocks. In order to ensure backwards compatibility the mechanism
      falls back to using message as base unit when it senses that the peer
      doesn't support the new algorithm. The default flow control window,
      i.e., how many units can be sent before the sender blocks and waits
      for an acknowledge (aka advertisement) is 512. This was tested against
      the previous version, which uses an acknowledge frequency of on ack per
      256 received message, and found to work fine.
      
      However, we missed the fact that versions older than Linux 3.15 use an
      acknowledge frequency of 512, which is exactly the limit where a 4.6+
      sender will stop and wait for acknowledge. This would also work fine if
      it weren't for the fact that if the first sent message on a 4.6+ server
      side is an empty SYNACK, this one is also is counted as a sent message,
      while it is not counted as a received message on a legacy 3.15-receiver.
      This leads to the sender always being one step ahead of the receiver, a
      scenario causing the sender to block after 512 sent messages, while the
      receiver only has registered 511 read messages. Hence, the legacy
      receiver is not trigged to send an acknowledge, with a permanently
      blocked sender as result.
      
      We solve this deadlock by simply allowing the sender to send one more
      message before it blocks, i.e., by a making minimal change to the
      condition used for determining connection congestion.
      Signed-off-by: 's avatarJon Maloy <jon.maloy@ericsson.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      6998cc6e
    • Arnd Bergmann's avatar
      mvpp2: use correct size for memset · e8f967c3
      Arnd Bergmann authored
      gcc-7 detects a short memset in mvpp2, introduced in the original
      merge of the driver:
      
      drivers/net/ethernet/marvell/mvpp2.c: In function 'mvpp2_cls_init':
      drivers/net/ethernet/marvell/mvpp2.c:3296:2: error: 'memset' used with length equal to number of elements without multiplication by element size [-Werror=memset-elt-size]
      
      The result seems to be that we write uninitialized data into the
      flow table registers, although we did not get any warning about
      that uninitialized data usage.
      
      Using sizeof() lets us initialize then entire array instead.
      
      Fixes: 3f518509 ("ethernet: Add new driver for Marvell Armada 375 network unit")
      Signed-off-by: 's avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      e8f967c3
    • Geliang Tang's avatar
      net/mlx5: drop duplicate header delay.h · 5e7dfeb7
      Geliang Tang authored
      Drop duplicate header delay.h from mlx5/core/main.c.
      Signed-off-by: 's avatarGeliang Tang <geliangtang@gmail.com>
      Acked-by: 's avatarMatan Barak <matanb@mellanox.com>
      Acked-by: 's avatarSaeed Mahameed <saeedm@mellanox.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      5e7dfeb7
    • Geliang Tang's avatar
      net: ieee802154: drop duplicate header delay.h · 8f8a8b13
      Geliang Tang authored
      Drop duplicate header delay.h from adf7242.c.
      Signed-off-by: 's avatarGeliang Tang <geliangtang@gmail.com>
      Acked-by: 's avatarStefan Schmidt <stefan@osg.samsung.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      8f8a8b13
    • Geliang Tang's avatar
      ibmvnic: drop duplicate header seq_file.h · 4ee12efa
      Geliang Tang authored
      Drop duplicate header seq_file.h from ibmvnic.c.
      Signed-off-by: 's avatarGeliang Tang <geliangtang@gmail.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      4ee12efa
    • Dan Carpenter's avatar
      fsl/fman: fix a leak in tgec_free() · 1f1e70ef
      Dan Carpenter authored
      We set "tgec->cfg" to NULL before passing it to kfree().  There is no
      need to set it to NULL at all.  Let's just delete it.
      
      Fixes: 57ba4c9b ("fsl/fman: Add FMan MAC support")
      Signed-off-by: 's avatarDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      1f1e70ef
    • Miroslav Lichvar's avatar
      net: ethtool: don't require CAP_NET_ADMIN for ETHTOOL_GLINKSETTINGS · 8006f6bf
      Miroslav Lichvar authored
      The ETHTOOL_GLINKSETTINGS command is deprecating the ETHTOOL_GSET
      command and likewise it shouldn't require the CAP_NET_ADMIN capability.
      Signed-off-by: 's avatarMiroslav Lichvar <mlichvar@redhat.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      8006f6bf
    • Jon Paul Maloy's avatar
      tipc: improve sanity check for received domain records · d876a4d2
      Jon Paul Maloy authored
      In commit 35c55c98 ("tipc: add neighbor monitoring framework") we
      added a data area to the link monitor STATE messages under the
      assumption that previous versions did not use any such data area.
      
      For versions older than Linux 4.3 this assumption is not correct. In
      those version, all STATE messages sent out from a node inadvertently
      contain a 16 byte data area containing a string; -a leftover from
      previous RESET messages which were using this during the setup phase.
      This string serves no purpose in STATE messages, and should no be there.
      
      Unfortunately, this data area is delivered to the link monitor
      framework, where a sanity check catches that it is not a correct domain
      record, and drops it. It also issues a rate limited warning about the
      event.
      
      Since such events occur much more frequently than anticipated, we now
      choose to remove the warning in order to not fill the kernel log with
      useless contents. We also make the sanity check stricter, to further
      reduce the risk that such data is inavertently admitted.
      Signed-off-by: 's avatarJon Maloy <jon.maloy@ericsson.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      d876a4d2
    • Jon Paul Maloy's avatar
      tipc: fix compatibility bug in link monitoring · f7967556
      Jon Paul Maloy authored
      commit 81729810 ("tipc: fix link priority propagation") introduced a
      compatibility problem between TIPC versions newer than Linux 4.6 and
      those older than Linux 4.4. In versions later than 4.4, link STATE
      messages only contain a non-zero link priority value when the sender
      wants the receiver to change its priority. This has the effect that the
      receiver resets itself in order to apply the new priority. This works
      well, and is consistent with the said commit.
      
      However, in versions older than 4.4 a valid link priority is present in
      all sent link STATE messages, leading to cyclic link establishment and
      reset on the 4.6+ node.
      
      We fix this by adding a test that the received value should not only
      be valid, but also differ from the current value in order to cause the
      receiving link endpoint to reset.
      Reported-by: 's avatarAmar Nv <amar.nv005@gmail.com>
      Signed-off-by: 's avatarJon Maloy <jon.maloy@ericsson.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      f7967556
    • Andrew Lunn's avatar
      net: ethernet: mvneta: Remove IFF_UNICAST_FLT which is not implemented · 97db8afa
      Andrew Lunn authored
      The mvneta driver advertises it supports IFF_UNICAST_FLT. However, it
      actually does not. The hardware probably does support it, but there is
      no code to configure the filter. As a quick and simple fix, remove the
      flag. This will cause the core to fall back to promiscuous mode.
      Signed-off-by: 's avatarAndrew Lunn <andrew@lunn.ch>
      Fixes: b50b72de ("net: mvneta: enable features before registering the driver")
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      97db8afa
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 3ad0e83c
      Linus Torvalds authored
      Pull parisc fixes from Helge Deller:
       "On parisc we were still seeing occasional random segmentation faults
        and memory corruption on SMP machines. Dave Anglin then looked again
        at the TLB related code and found two issues in the PCI DMA and
        generic TLB flush functions.
      
        Then, in our startup code we had some timing of the cache and TLB
        functions to calculate a threshold when to use a complete TLB/cache
        flush or just to flush a specific range. This code produced a race
        with newly started CPUs and thus lead to occasional kernel crashes
        (due to stale TLB/cache entries). The patch by Dave fixes this issue
        by flushing the local caches before starting secondary CPUs and by
        removing the race.
      
        The last problem fixed by this series is that we quite often suffered
        from hung tasks and self-detected stalls on the CPUs. It was somehow
        clear that this was related to the (in v4.7) newly introduced cr16
        clocksource and the own implementation of sched_clock(). I replaced
        the open-coded sched_clock() function and switched to the generic
        sched_clock() implementation which seems to have fixed this isse as
        well.
      
        All patches have been sucessfully tested on a variety of machines,
        including our debian buildd servers.
      
        All patches (beside the small pr_cont fix) are tagged for stable
        releases"
      
      * 'parisc-4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: Also flush data TLB in flush_icache_page_asm
        parisc: Fix race in pci-dma.c
        parisc: Switch to generic sched_clock implementation
        parisc: Fix races in parisc_setup_cache_timing()
        parisc: Fix printk continuations in system detection
      3ad0e83c
  4. 25 Nov, 2016 17 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security · 86b01b54
      Linus Torvalds authored
      Pull keys fixes from James Morris:
       "From David:
      
         - Fix mpi_powm()'s handling of a number with a zero exponent
           [CVE-2016-8650].
      
           Integrate my and Andrey's patches for mpi_powm() and use
           mpi_resize() instead of RESIZE_IF_NEEDED() - the latter adds a
           duplicate check into the execution path of a trivial case we
           don't normally expect to be taken.
      
         - Fix double free in X.509 error handling"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
        mpi: Fix NULL ptr dereference in mpi_powm() [ver #3]
        X.509: Fix double free in x509_cert_parse() [ver #3]
      86b01b54
    • Linus Torvalds's avatar
      Fix subtle CONFIG_MODVERSIONS problems · cd3caefb
      Linus Torvalds authored
      CONFIG_MODVERSIONS has been broken for pretty much the whole 4.9 series,
      and quite frankly, nobody has cared very deeply.  We absolutely know how
      to fix it, and it's not _complicated_, but it's not exactly pretty
      either.
      
      This oneliner fixes it without the ugliness, and allows for further
      future cleanups.
      
        "We've secretly replaced their regular MODVERSIONS with nothing at
         all, let's see if they notice"
      Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
      cd3caefb
    • Linus Torvalds's avatar
      Merge tag 'acpi-4.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · beb53e4b
      Linus Torvalds authored
      Pull ACPI fixes from Rafael Wysocki:
       "Two ACPI fixes for 4.9-rc7.
      
        One of them reverts a recent ACPI commit that attempted to improve
        reboot/power-off on some systems, but introduced problems elsewhere,
        and the other one fixes kernel builds with the new WDAT watchdog
        driver enabled in some configurations.
      
        Specifics:
      
         - Revert the recent commit that caused the ACPI _PTS method to be
           executed in the power-off/reboot code path (as per the
           specification) in an attempt to improve things on some systems
           (apparently expecting _PTS to be executed in that code path), but
           broke power-off/reboot on at least one other machine (Rafael
           Wysocki).
      
         - Fix kernel builds with the new WDAT watchdog driver enabled in some
           configurations by explicitly selecting WATCHDOG_CORE when enabling
           the WDAT watchdog driver (Mika Westerberg)"
      
      * tag 'acpi-4.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        watchdog: wdat_wdt: Select WATCHDOG_CORE
        Revert "ACPI: Execute _PTS before system reboot"
      beb53e4b
    • Rafael J. Wysocki's avatar
      MAINTAINERS: Add bug tracking system location entry type · 68656443
      Rafael J. Wysocki authored
      Following the kernel Bugzilla discussion during the Kernel Summit
      (https://lwn.net/Articles/705245/), add bug tracking system location
      entry type (B) to MAINTAINERS and populate it for several subsystems
      known to be using the kernel BZ actively (and add the upstream BZ for
      ACPICA too).
      Signed-off-by: 's avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
      Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
      68656443
    • Jarkko Nikula's avatar
      Revert "i2c: designware: do not disable adapter after transfer" · 89119f08
      Jarkko Nikula authored
      This reverts commit 0317e6c0.
      
      Srinivas reported recently touchscreen and touchpad stopped working in
      Haswell based machine in Linux 4.9-rc series with timeout errors from
      i2c_designware:
      
      [   16.508013] i2c_designware INT33C3:00: controller timed out
      [   16.508302] i2c_hid i2c-MSFT0001:02: failed to change power setting.
      [   17.532016] i2c_designware INT33C3:00: controller timed out
      [   18.556022] i2c_designware INT33C3:00: controller timed out
      [   18.556315] i2c_hid i2c-ATML1000:00: failed to retrieve report from device.
      
      I managed to reproduce similar errors on another Haswell based machine
      where touchscreen initialization fails maybe in every 1/5 - 1/2 boots.
      Since root cause for these errors is not clear yet and debugging is
      ongoing it's better to revert this commit as we are near to release.
      Reported-by: 's avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
      Signed-off-by: 's avatarJarkko Nikula <jarkko.nikula@linux.intel.com>
      Signed-off-by: 's avatarWolfram Sang <wsa@the-dreams.de>
      89119f08
    • Rafael J. Wysocki's avatar
      Merge branches 'acpi-sleep-fixes' and 'acpi-wdat-fixes' · 7e5c07af
      Rafael J. Wysocki authored
      * acpi-sleep-fixes:
        Revert "ACPI: Execute _PTS before system reboot"
      
      * acpi-wdat-fixes:
        watchdog: wdat_wdt: Select WATCHDOG_CORE
      7e5c07af
    • David S. Miller's avatar
      Merge tag 'linux-can-fixes-for-4.9-20161123' of... · fb09c8c5
      David S. Miller authored
      Merge tag 'linux-can-fixes-for-4.9-20161123' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
      
      Marc Kleine-Budde says:
      
      ====================
      pull-request: can 2016-11-23
      
      this is a pull request for net/master.
      
      The patch by Oliver Hartkopp for the broadcast manager (bcm) fixes the
      CAN-FD support, which may cause an out-of-bounds access otherwise.
      ====================
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      fb09c8c5
    • Geliang Tang's avatar
      dwc_eth_qos: drop duplicate headers · f7db0ec9
      Geliang Tang authored
      Drop duplicate headers types.h and delay.h from dwc_eth_qos.c.
      Signed-off-by: 's avatarGeliang Tang <geliangtang@gmail.com>
      Signed-off-by: 's avatarDavid S. Miller <davem@davemloft.net>
      f7db0ec9
    • Linus Torvalds's avatar
      Merge tag 'mfd-fixes-4.9.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd · f2051f8f
      Linus Torvalds authored
      Pull MFD fixes from Lee Jones:
       "Received a copule of last minute fixes for v4.9.
      
        The patches from Viresh are fixing issues displayed in KernelCI"
      
      * tag 'mfd-fixes-4.9.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
        mfd: wm8994-core: Don't use managed regulator bulk get API
        mfd: wm8994-core: Disable regulators before removing them
        mfd: syscon: Support native-endian regmaps
      f2051f8f
    • Linus Torvalds's avatar
      Merge tag 'media/v4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media · ea9ea6c6
      Linus Torvalds authored
      Pull media fix from Mauro Carvalho Chehab:
       "Fix for the firmware load logic of the tuner-xc2028 driver"
      
      * tag 'media/v4.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
        xc2028: Fix use-after-free bug properly
      ea9ea6c6
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-for-v4.9-rc7' of git://people.freedesktop.org/~airlied/linux · 6006d6e7
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Seems to be quietening down nicely, a few mediatek, one exynos and one
        hdlcd fix, along with two amd fixes"
      
      * tag 'drm-fixes-for-v4.9-rc7' of git://people.freedesktop.org/~airlied/linux:
        gpu/drm/exynos/exynos_hdmi - Unmap region obtained by of_iomap
        drm/mediatek: fix null pointer dereference
        drm/mediatek: fixed the calc method of data rate per lane
        drm/mediatek: fix a typo of DISP_OD_CFG to OD_RELAYMODE
        drm/radeon: fix power state when port pm is unavailable (v2)
        drm/amdgpu: fix power state when port pm is unavailable
        drm/arm: hdlcd: fix plane base address update
        drm/amd/powerplay: avoid out of bounds access on array ps.
      6006d6e7
    • John David Anglin's avatar
      parisc: Also flush data TLB in flush_icache_page_asm · 5035b230
      John David Anglin authored
      This is the second issue I noticed in reviewing the parisc TLB code.
      
      The fic instruction may use either the instruction or data TLB in
      flushing the instruction cache.  Thus, on machines with a split TLB, we
      should also flush the data TLB after setting up the temporary alias
      registers.
      
      Although this has no functional impact, I changed the pdtlb and pitlb
      instructions to consistently use the index register %r0.  These
      instructions do not support integer displacements.
      
      Tested on rp3440 and c8000.
      Signed-off-by: 's avatarJohn David Anglin  <dave.anglin@bell.net>
      Cc: <stable@vger.kernel.org> # v3.16+
      Signed-off-by: 's avatarHelge Deller <deller@gmx.de>
      5035b230
    • John David Anglin's avatar
      parisc: Fix race in pci-dma.c · c0452fb9
      John David Anglin authored
      We are still troubled by occasional random segmentation faults and
      memory memory corruption on SMP machines.  The causes quite a few
      package builds to fail on the Debian buildd machines for parisc.  When
      gcc-6 failed to build three times in a row, I looked again at the TLB
      related code.  I found a couple of issues.  This is the first.
      
      In general, we need to ensure page table updates and corresponding TLB
      purges are atomic.  The attached patch fixes an instance in pci-dma.c
      where the page table update was not guarded by the TLB lock.
      
      Tested on rp3440 and c8000.  So far, no further random segmentation
      faults have been observed.
      Signed-off-by: 's avatarJohn David Anglin  <dave.anglin@bell.net>
      Cc: <stable@vger.kernel.org> # v3.16+
      Signed-off-by: 's avatarHelge Deller <deller@gmx.de>
      c0452fb9
    • Helge Deller's avatar
      parisc: Switch to generic sched_clock implementation · 43b1f6ab
      Helge Deller authored
      Drop the open-coded sched_clock() function and replace it by the provided
      GENERIC_SCHED_CLOCK implementation.  We have seen quite some hung tasks in the
      past, which seem to be fixed by this patch.
      Signed-off-by: 's avatarHelge Deller <deller@gmx.de>
      Cc: <stable@vger.kernel.org> # v4.7+
      Signed-off-by: 's avatarHelge Deller <deller@gmx.de>
      43b1f6ab
    • John David Anglin's avatar
      parisc: Fix races in parisc_setup_cache_timing() · 741dc7bf
      John David Anglin authored
      Helge reported to me the following startup crash:
      
      [    0.000000] Linux version 4.8.0-1-parisc64-smp (debian-kernel@lists.debian.org) (gcc version 5.4.1 20161019 (GCC) ) #1 SMP Debian 4.8.7-1 (2016-11-13)
      [    0.000000] The 64-bit Kernel has started...
      [    0.000000] Kernel default page size is 4 KB. Huge pages enabled with 1 MB physical and 2 MB virtual size.
      [    0.000000] Determining PDC firmware type: System Map.
      [    0.000000] model 9000/785/J5000
      [    0.000000] Total Memory: 2048 MB
      [    0.000000] Memory: 2018528K/2097152K available (9272K kernel code, 3053K rwdata, 1319K rodata, 1024K init, 840K bss, 78624K reserved, 0K cma-reserved)
      [    0.000000] virtual kernel memory layout:
      [    0.000000]     vmalloc : 0x0000000000008000 - 0x000000003f000000   (1007 MB)
      [    0.000000]     memory  : 0x0000000040000000 - 0x00000000c0000000   (2048 MB)
      [    0.000000]       .init : 0x0000000040100000 - 0x0000000040200000   (1024 kB)
      [    0.000000]       .data : 0x0000000040b0e000 - 0x0000000040f533e0   (4372 kB)
      [    0.000000]       .text : 0x0000000040200000 - 0x0000000040b0e000   (9272 kB)
      [    0.768910] Brought up 1 CPUs
      [    0.992465] NET: Registered protocol family 16
      [    2.429981] Releasing cpu 1 now, hpa=fffffffffffa2000
      [    2.635751] CPU(s): 2 out of 2 PA8500 (PCX-W) at 440.000000 MHz online
      [    2.726692] Setting cache flush threshold to 1024 kB
      [    2.729932] Not-handled unaligned insn 0x43ffff80
      [    2.798114] Setting TLB flush threshold to 140 kB
      [    2.928039] Unaligned handler failed, ret = -1
      [    3.000419]       _______________________________
      [    3.000419]      < Your System ate a SPARC! Gah! >
      [    3.000419]       -------------------------------
      [    3.000419]              \   ^__^
      [    3.000419]                  (__)\       )\/\
      [    3.000419]                   U  ||----w |
      [    3.000419]                      ||     ||
      [    9.340055] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.8.0-1-parisc64-smp #1 Debian 4.8.7-1
      [    9.448082] task: 00000000bfd48060 task.stack: 00000000bfd50000
      [    9.528040]
      [   10.760029] IASQ: 0000000000000000 0000000000000000 IAOQ: 000000004025d154 000000004025d158
      [   10.868052]  IIR: 43ffff80    ISR: 0000000000340000  IOR: 000001ff54150960
      [   10.960029]  CPU:        1   CR30: 00000000bfd50000 CR31: 0000000011111111
      [   11.052057]  ORIG_R28: 000000004021e3b4
      [   11.100045]  IAOQ[0]: irq_exit+0x94/0x120
      [   11.152062]  IAOQ[1]: irq_exit+0x98/0x120
      [   11.208031]  RP(r2): irq_exit+0xb8/0x120
      [   11.256074] Backtrace:
      [   11.288067]  [<00000000402cd944>] cpu_startup_entry+0x1e4/0x598
      [   11.368058]  [<0000000040109528>] smp_callin+0x2c0/0x2f0
      [   11.436308]  [<00000000402b53fc>] update_curr+0x18c/0x2d0
      [   11.508055]  [<00000000402b73b8>] dequeue_entity+0x2c0/0x1030
      [   11.584040]  [<00000000402b3cc0>] set_next_entity+0x80/0xd30
      [   11.660069]  [<00000000402c1594>] pick_next_task_fair+0x614/0x720
      [   11.740085]  [<000000004020dd34>] __schedule+0x394/0xa60
      [   11.808054]  [<000000004020e488>] schedule+0x88/0x118
      [   11.876039]  [<0000000040283d3c>] rescuer_thread+0x4d4/0x5b0
      [   11.948090]  [<000000004028fc4c>] kthread+0x1ec/0x248
      [   12.016053]  [<0000000040205020>] end_fault_vector+0x20/0xc0
      [   12.092239]  [<00000000402050c0>] _switch_to_ret+0x0/0xf40
      [   12.164044]
      [   12.184036] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.8.0-1-parisc64-smp #1 Debian 4.8.7-1
      [   12.244040] Backtrace:
      [   12.244040]  [<000000004021c480>] show_stack+0x68/0x80
      [   12.244040]  [<00000000406f332c>] dump_stack+0xec/0x168
      [   12.244040]  [<000000004021c74c>] die_if_kernel+0x25c/0x430
      [   12.244040]  [<000000004022d320>] handle_unaligned+0xb48/0xb50
      [   12.244040]
      [   12.632066] ---[ end trace 9ca05a7215c7bbb2 ]---
      [   12.692036] Kernel panic - not syncing: Attempted to kill the idle task!
      
      We have the insn 0x43ffff80 in IIR but from IAOQ we should have:
         4025d150:   0f f3 20 df     ldd,s r19(r31),r31
         4025d154:   0f 9f 00 9c     ldw r31(ret0),ret0
         4025d158:   bf 80 20 58     cmpb,*<> r0,ret0,4025d18c <irq_exit+0xcc>
      
      Cpu0 has just completed running parisc_setup_cache_timing:
      
      [    2.429981] Releasing cpu 1 now, hpa=fffffffffffa2000
      [    2.635751] CPU(s): 2 out of 2 PA8500 (PCX-W) at 440.000000 MHz online
      [    2.726692] Setting cache flush threshold to 1024 kB
      [    2.729932] Not-handled unaligned insn 0x43ffff80
      [    2.798114] Setting TLB flush threshold to 140 kB
      [    2.928039] Unaligned handler failed, ret = -1
      
      From the backtrace, cpu1 is in smp_callin:
      
      void __init smp_callin(void)
      {
             int slave_id = cpu_now_booting;
      
             smp_cpu_init(slave_id);
             preempt_disable();
      
             flush_cache_all_local(); /* start with known state */
             flush_tlb_all_local(NULL);
      
             local_irq_enable();  /* Interrupts have been off until now */
      
             cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
      
      So, it has just flushed its caches and the TLB. It would seem either the
      flushes in parisc_setup_cache_timing or smp_callin have corrupted kernel
      memory.
      
      The attached patch reworks parisc_setup_cache_timing to remove the races
      in setting the cache and TLB flush thresholds. It also corrects the
      number of bytes flushed in the TLB calculation.
      
      The patch flushes the cache and TLB on cpu0 before starting the
      secondary processors so that they are started from a known state.
      
      Tested with a few reboots on c8000.
      Signed-off-by: 's avatarJohn David Anglin  <dave.anglin@bell.net>
      Cc: <stable@vger.kernel.org> # v3.18+
      Signed-off-by: 's avatarHelge Deller <deller@gmx.de>
      741dc7bf
    • Viresh Kumar's avatar
      mfd: wm8994-core: Don't use managed regulator bulk get API · 1a41741f
      Viresh Kumar authored
      The kernel WARNs and then crashes today if wm8994_device_init() fails
      after calling devm_regulator_bulk_get().
      
      That happens because there are multiple devices involved here and the
      order in which managed resources are freed isn't correct.
      
      The regulators are added as children of wm8994->dev.  Whereas,
      devm_regulator_bulk_get() receives wm8994->dev as the device, though it
      gets the same regulators which were added as children of wm8994->dev
      earlier.
      
      During failures, the children are removed first and the core eventually
      calls regulator_unregister() for them. As regulator_put() was never done
      for them (opposite of devm_regulator_bulk_get()), the kernel WARNs at
      
      	WARN_ON(rdev->open_count);
      
      And eventually it crashes from debugfs_remove_recursive().
      
      --------x------------------x----------------
      
       wm8994 3-001a: Device is not a WM8994, ID is 0
       ------------[ cut here ]------------
       WARNING: CPU: 0 PID: 1 at /mnt/ssd/all/work/repos/devel/linux/drivers/regulator/core.c:4072 regulator_unregister+0xc8/0xd0
       Modules linked in:
       CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.8.0-rc6-00154-g54fe84cbd50b #41
       Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
       [<c010e24c>] (unwind_backtrace) from [<c010af38>] (show_stack+0x10/0x14)
       [<c010af38>] (show_stack) from [<c032a1c4>] (dump_stack+0x88/0x9c)
       [<c032a1c4>] (dump_stack) from [<c011a98c>] (__warn+0xe8/0x100)
       [<c011a98c>] (__warn) from [<c011aa54>] (warn_slowpath_null+0x20/0x28)
       [<c011aa54>] (warn_slowpath_null) from [<c0384a0c>] (regulator_unregister+0xc8/0xd0)
       [<c0384a0c>] (regulator_unregister) from [<c0406434>] (release_nodes+0x16c/0x1dc)
       [<c0406434>] (release_nodes) from [<c04039c4>] (__device_release_driver+0x8c/0x110)
       [<c04039c4>] (__device_release_driver) from [<c0403a64>] (device_release_driver+0x1c/0x28)
       [<c0403a64>] (device_release_driver) from [<c0402b24>] (bus_remove_device+0xd8/0x104)
       [<c0402b24>] (bus_remove_device) from [<c03ffcd8>] (device_del+0x10c/0x218)
       [<c03ffcd8>] (device_del) from [<c0404e4c>] (platform_device_del+0x1c/0x88)
       [<c0404e4c>] (platform_device_del) from [<c0404ec4>] (platform_device_unregister+0xc/0x20)
       [<c0404ec4>] (platform_device_unregister) from [<c0428bc0>] (mfd_remove_devices_fn+0x5c/0x64)
       [<c0428bc0>] (mfd_remove_devices_fn) from [<c03ff9d8>] (device_for_each_child_reverse+0x4c/0x78)
       [<c03ff9d8>] (device_for_each_child_reverse) from [<c04288c4>] (mfd_remove_devices+0x20/0x30)
       [<c04288c4>] (mfd_remove_devices) from [<c042758c>] (wm8994_device_init+0x2ac/0x7f0)
       [<c042758c>] (wm8994_device_init) from [<c04f14a8>] (i2c_device_probe+0x178/0x1fc)
       [<c04f14a8>] (i2c_device_probe) from [<c04036fc>] (driver_probe_device+0x214/0x2c0)
       [<c04036fc>] (driver_probe_device) from [<c0403854>] (__driver_attach+0xac/0xb0)
       [<c0403854>] (__driver_attach) from [<c0401a74>] (bus_for_each_dev+0x68/0x9c)
       [<c0401a74>] (bus_for_each_dev) from [<c0402cf0>] (bus_add_driver+0x1a0/0x218)
       [<c0402cf0>] (bus_add_driver) from [<c040406c>] (driver_register+0x78/0xf8)
       [<c040406c>] (driver_register) from [<c04f20a0>] (i2c_register_driver+0x34/0x84)
       [<c04f20a0>] (i2c_register_driver) from [<c01017d0>] (do_one_initcall+0x40/0x170)
       [<c01017d0>] (do_one_initcall) from [<c0a00dbc>] (kernel_init_freeable+0x15c/0x1fc)
       [<c0a00dbc>] (kernel_init_freeable) from [<c06e07b0>] (kernel_init+0x8/0x114)
       [<c06e07b0>] (kernel_init) from [<c0107978>] (ret_from_fork+0x14/0x3c)
       ---[ end trace 0919d3d0bc998260 ]---
      
       [snip..]
      
       Unable to handle kernel NULL pointer dereference at virtual address 00000078
       pgd = c0004000
       [00000078] *pgd=00000000
       Internal error: Oops: 5 [#1] PREEMPT SMP ARM
       Modules linked in:
       CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W       4.8.0-rc6-00154-g54fe84cbd50b #41
       Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
       task: ee874000 task.stack: ee878000
       PC is at down_write+0x14/0x54
       LR is at debugfs_remove_recursive+0x30/0x150
      
       [snip..]
      
       [<c06e489c>] (down_write) from [<c02e9954>] (debugfs_remove_recursive+0x30/0x150)
       [<c02e9954>] (debugfs_remove_recursive) from [<c0382b78>] (_regulator_put+0x24/0xac)
       [<c0382b78>] (_regulator_put) from [<c0382c1c>] (regulator_put+0x1c/0x2c)
       [<c0382c1c>] (regulator_put) from [<c0406434>] (release_nodes+0x16c/0x1dc)
       [<c0406434>] (release_nodes) from [<c04035d4>] (driver_probe_device+0xec/0x2c0)
       [<c04035d4>] (driver_probe_device) from [<c0403854>] (__driver_attach+0xac/0xb0)
       [<c0403854>] (__driver_attach) from [<c0401a74>] (bus_for_each_dev+0x68/0x9c)
       [<c0401a74>] (bus_for_each_dev) from [<c0402cf0>] (bus_add_driver+0x1a0/0x218)
       [<c0402cf0>] (bus_add_driver) from [<c040406c>] (driver_register+0x78/0xf8)
       [<c040406c>] (driver_register) from [<c04f20a0>] (i2c_register_driver+0x34/0x84)
       [<c04f20a0>] (i2c_register_driver) from [<c01017d0>] (do_one_initcall+0x40/0x170)
       [<c01017d0>] (do_one_initcall) from [<c0a00dbc>] (kernel_init_freeable+0x15c/0x1fc)
       [<c0a00dbc>] (kernel_init_freeable) from [<c06e07b0>] (kernel_init+0x8/0x114)
       [<c06e07b0>] (kernel_init) from [<c0107978>] (ret_from_fork+0x14/0x3c)
       Code: e1a04000 f590f000 e3a03001 e34f3fff (e1902f9f)
       ---[ end trace 0919d3d0bc998262 ]---
      
      --------x------------------x----------------
      
      Fix the kernel warnings and crashes by using regulator_bulk_get()
      instead of devm_regulator_bulk_get() and explicitly freeing the supplies
      in exit paths.
      
      Tested on Exynos 5250, dual core ARM A15 machine.
      Signed-off-by: 's avatarViresh Kumar <viresh.kumar@linaro.org>
      Acked-by: 's avatarCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
      Signed-off-by: 's avatarLee Jones <lee.jones@linaro.org>
      1a41741f
    • Viresh Kumar's avatar
      mfd: wm8994-core: Disable regulators before removing them · 3cfc43df
      Viresh Kumar authored
      The order in which resources were freed in wm8994_device_exit() isn't
      correct. The regulators are removed before they are disabled.
      
      Fix it by reordering code a bit, which makes it exact opposite of
      wm8994_device_init() as well.
      Signed-off-by: 's avatarViresh Kumar <viresh.kumar@linaro.org>
      Acked-by: 's avatarCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
      Signed-off-by: 's avatarLee Jones <lee.jones@linaro.org>
      3cfc43df