1. 17 Feb, 2014 13 commits
    • Linus Torvalds's avatar
      Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc · f2a77abd
      Linus Torvalds authored
      Pull powerpc fixes from Ben Herrenschmidt:
       "Here are some more powerpc fixes for 3.14
      
        The main one is a nasty issue with the NUMA balancing support which
        requires a small generic change and the addition of a new accessor to
        set _PAGE_NUMA.  Both have been reviewed and acked by Mel and Rik.
      
        The changelog should have plenty of details but basically, without
        this fix, we get random user segfaults and/or corruptions due to
        missing TLB/hash flushes.  Aneesh series of 3 patches fixes it.
      
        We have some vDSO vs.  perf fixes from Anton, some small EEH fixes
        from Gavin, a ppc32 regression vs the stack overflow detector, and a
        fix for the way we handle PCIe host bridge speed settings on pseries
        (which is needed for proper operations of AMD graphics cards on
        Power8)"
      
      * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
        powerpc/eeh: Disable EEH on reboot
        powerpc/eeh: Cleanup on eeh_subsystem_enabled
        powerpc/powernv: Rework EEH reset
        powerpc: Use unstripped VDSO image for more accurate profiling data
        powerpc: Link VDSOs at 0x0
        mm: Use ptep/pmdp_set_numa() for updating _PAGE_NUMA bit
        mm: Dirty accountable change only apply to non prot numa case
        powerpc/mm: Add new "set" flag argument to pte/pmd update function
        powerpc/pseries: Add Gen3 definitions for PCIE link speed
        powerpc/pseries: Fix regression on PCI link speed
        powerpc: Set the correct ksp_limit on ppc32 when switching to irq stack
      f2a77abd
    • Linus Torvalds's avatar
      printk: fix syslog() overflowing user buffer · e4178d80
      Linus Torvalds authored
      This is not a buffer overflow in the traditional sense: we don't
      overflow any *kernel* buffers, but we do mis-count the amount of data we
      copy back to user space for the SYSLOG_ACTION_READ_ALL case.
      
      In particular, if the user buffer is too small to hold everything, and
      *if* there is a continuation line at just the right place, we can end up
      giving the user more data than he asked for.
      
      The reason is that we first count up the number of bytes all the log
      records contains, then we walk the records again until we've skipped the
      records at the beginning that won't fit, and then we walk the rest of
      the records and copy them to the user space buffer.
      
      And in between that "skip the initial records that won't fit" and the
      "copy the records that *will* fit to user space", we reset the 'prev'
      variable that contained the record information for the last record not
      copied.  That meant that when we started copying to user space, we now
      had a different character count than what we had originally calculated
      in the first record walk-through.
      
      The fix is to simply not clear the 'prev' flags value (in both cases
      where we had the same logic: syslog_print_all and kmsg_dump_get_buffer:
      the latter is used for pstore-like dumping)
      Reported-and-tested-by: default avatarDebabrata Banerjee <dbanerje@akamai.com>
      Acked-by: default avatarKay Sievers <kay@vrfy.org>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Jeff Mahoney <jeffm@suse.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e4178d80
    • Gavin Shan's avatar
      powerpc/eeh: Disable EEH on reboot · 66f9af83
      Gavin Shan authored
      We possiblly detect EEH errors during reboot, particularly in kexec
      path, but it's impossible for device drivers and EEH core to handle
      or recover them properly.
      
      The patch registers one reboot notifier for EEH and disable EEH
      subsystem during reboot. That means the EEH errors is going to be
      cleared by hardware reset or second kernel during early stage of
      PCI probe.
      Signed-off-by: default avatarGavin Shan <shangw@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      66f9af83
    • Gavin Shan's avatar
      powerpc/eeh: Cleanup on eeh_subsystem_enabled · 2ec5a0ad
      Gavin Shan authored
      The patch cleans up variable eeh_subsystem_enabled so that we needn't
      refer the variable directly from external. Instead, we will use
      function eeh_enabled() and eeh_set_enable() to operate the variable.
      Signed-off-by: default avatarGavin Shan <shangw@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      2ec5a0ad
    • Gavin Shan's avatar
      powerpc/powernv: Rework EEH reset · 5b2e198e
      Gavin Shan authored
      When doing reset in order to recover the affected PE, we issue
      hot reset on PE primary bus if it's not root bus. Otherwise, we
      issue hot or fundamental reset on root port or PHB accordingly.
      For the later case, we didn't cover the situation where PE only
      includes root port and it potentially causes kernel crash upon
      EEH error to the PE.
      
      The patch reworks the logic of EEH reset to improve the code
      readability and also avoid the kernel crash.
      
      Cc: stable@vger.kernel.org
      Reported-by: default avatarThadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
      Signed-off-by: default avatarGavin Shan <shangw@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      5b2e198e
    • Anton Blanchard's avatar
      powerpc: Use unstripped VDSO image for more accurate profiling data · 24b659a1
      Anton Blanchard authored
      We are seeing a lot of hits in the VDSO that are not resolved by perf.
      A while(1) gettimeofday() loop shows the issue:
      
      27.64%  [vdso]  [.] 0x000000000000060c
      22.57%  [vdso]  [.] 0x0000000000000628
      16.88%  [vdso]  [.] 0x0000000000000610
      12.39%  [vdso]  [.] __kernel_gettimeofday
       6.09%  [vdso]  [.] 0x00000000000005f8
       3.58%  test    [.] 00000037.plt_call.gettimeofday@@GLIBC_2.18
       2.94%  [vdso]  [.] __kernel_datapage_offset
       2.90%  test    [.] main
      
      We are using a stripped VDSO image which means only symbols with
      relocation info can be resolved. There isn't a lot of point to
      stripping the VDSO, the debug info is only about 1kB:
      
      4680 arch/powerpc/kernel/vdso64/vdso64.so
      5815 arch/powerpc/kernel/vdso64/vdso64.so.dbg
      
      By using the unstripped image, we can resolve all the symbols in the
      VDSO and the perf profile data looks much better:
      
      76.53%  [vdso]  [.] __do_get_tspec
      12.20%  [vdso]  [.] __kernel_gettimeofday
       5.05%  [vdso]  [.] __get_datapage
       3.20%  test    [.] main
       2.92%  test    [.] 00000037.plt_call.gettimeofday@@GLIBC_2.18
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      24b659a1
    • Anton Blanchard's avatar
      powerpc: Link VDSOs at 0x0 · a0a4419e
      Anton Blanchard authored
      perf is failing to resolve symbols in the VDSO. A while (1)
      gettimeofday() loop shows:
      
      93.99%  [vdso]  [.] 0x00000000000005e0
       3.12%  test    [.] 00000037.plt_call.gettimeofday@@GLIBC_2.18
       2.81%  test    [.] main
      
      The reason for this is that we are linking our VDSO shared libraries
      at 1MB, which is a little weird. Even though this is uncommon, Alan
      points out that it is valid and we should probably fix perf userspace.
      
      Regardless, I can't see a reason why we are doing this. The code
      is all position independent and we never rely on the VDSO ending
      up at 1M (and we never place it there on 64bit tasks).
      
      Changing our link address to 0x0 fixes perf VDSO symbol resolution:
      
      73.18%  [vdso]  [.] 0x000000000000060c
      12.39%  [vdso]  [.] __kernel_gettimeofday
       3.58%  test    [.] 00000037.plt_call.gettimeofday@@GLIBC_2.18
       2.94%  [vdso]  [.] __kernel_datapage_offset
       2.90%  test    [.] main
      
      We still have some local symbol resolution issues that will be
      fixed in a subsequent patch.
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      a0a4419e
    • Aneesh Kumar K.V's avatar
      mm: Use ptep/pmdp_set_numa() for updating _PAGE_NUMA bit · 56eecdb9
      Aneesh Kumar K.V authored
      Archs like ppc64 doesn't do tlb flush in set_pte/pmd functions when using
      a hash table MMU for various reasons (the flush is handled as part of
      the PTE modification when necessary).
      
      ppc64 thus doesn't implement flush_tlb_range for hash based MMUs.
      
      Additionally ppc64 require the tlb flushing to be batched within ptl locks.
      
      The reason to do that is to ensure that the hash page table is in sync with
      linux page table.
      
      We track the hpte index in linux pte and if we clear them without flushing
      hash and drop the ptl lock, we can have another cpu update the pte and can
      end up with duplicate entry in the hash table, which is fatal.
      
      We also want to keep set_pte_at simpler by not requiring them to do hash
      flush for performance reason. We do that by assuming that set_pte_at() is
      never *ever* called on a PTE that is already valid.
      
      This was the case until the NUMA code went in which broke that assumption.
      
      Fix that by introducing a new pair of helpers to set _PAGE_NUMA in a
      way similar to ptep/pmdp_set_wrprotect(), with a generic implementation
      using set_pte_at() and a powerpc specific one using the appropriate
      mechanism needed to keep the hash table in sync.
      Acked-by: default avatarMel Gorman <mgorman@suse.de>
      Reviewed-by: default avatarRik van Riel <riel@redhat.com>
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      56eecdb9
    • Aneesh Kumar K.V's avatar
    • Aneesh Kumar K.V's avatar
      powerpc/mm: Add new "set" flag argument to pte/pmd update function · 88247e8d
      Aneesh Kumar K.V authored
      pte_update() is a powerpc-ism used to change the bits of a PTE
      when the access permission is being restricted (a flush is
      potentially needed).
      
      It uses atomic operations on when needed and handles the hash
      synchronization on hash based processors.
      
      It is currently only used to clear PTE bits and so the current
      implementation doesn't provide a way to also set PTE bits.
      
      The new _PAGE_NUMA bit, when set, is actually restricting access
      so it must use that function too, so this change adds the ability
      for pte_update() to also set bits.
      
      We will use this later to set the _PAGE_NUMA bit.
      Acked-by: default avatarMel Gorman <mgorman@suse.de>
      Acked-by: default avatarRik van Riel <riel@redhat.com>
      Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      88247e8d
    • Kleber Sacilotto de Souza's avatar
      powerpc/pseries: Add Gen3 definitions for PCIE link speed · 49d9684a
      Kleber Sacilotto de Souza authored
      Rev3 of the PCI Express Base Specification defines a Supported Link
      Speeds Vector where the bit definitions within this field are:
      
      Bit 0 - 2.5 GT/s
      Bit 1 - 5.0 GT/s
      Bit 2 - 8.0 GT/s
      
      This vector definition is used by the platform firmware to export the
      maximum and current link speeds of the PCI bus via the
      "ibm,pcie-link-speed-stats" device-tree property.
      
      This patch updates pseries_root_bridge_prepare() to detect Gen3
      speed buses (defined by 0x04).
      Signed-off-by: default avatarKleber Sacilotto de Souza <klebers@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      49d9684a
    • Kleber Sacilotto de Souza's avatar
      powerpc/pseries: Fix regression on PCI link speed · b020cc6c
      Kleber Sacilotto de Souza authored
      Commit 5091f0c9 (powerpc/pseries: Fix PCIE link speed endian issue)
      introduced a regression on the PCI link speed detection using the
      device-tree property. The ibm,pcie-link-speed-stats property is composed
      of two 32-bit integers, the first one being the maxinum link speed and
      the second the current link speed. The changes introduced by the
      aforementioned commit are considering just the first integer.
      
      Fix this issue by changing how the property is accessed, using the
      helper functions to properly access the array of values. The explicit
      byte swapping is not needed anymore here, since it's done by the helper
      functions.
      Signed-off-by: default avatarKleber Sacilotto de Souza <klebers@linux.vnet.ibm.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      b020cc6c
    • Kevin Hao's avatar
      powerpc: Set the correct ksp_limit on ppc32 when switching to irq stack · 1a18a664
      Kevin Hao authored
      Guenter Roeck has got the following call trace on a p2020 board:
        Kernel stack overflow in process eb3e5a00, r1=eb79df90
        CPU: 0 PID: 2838 Comm: ssh Not tainted 3.13.0-rc8-juniper-00146-g19eca00 #4
        task: eb3e5a00 ti: c0616000 task.ti: ef440000
        NIP: c003a420 LR: c003a410 CTR: c0017518
        REGS: eb79dee0 TRAP: 0901   Not tainted (3.13.0-rc8-juniper-00146-g19eca00)
        MSR: 00029000 <CE,EE,ME>  CR: 24008444  XER: 00000000
        GPR00: c003a410 eb79df90 eb3e5a00 00000000 eb05d900 00000001 65d87646 00000000
        GPR08: 00000000 020b8000 00000000 00000000 44008442
        NIP [c003a420] __do_softirq+0x94/0x1ec
        LR [c003a410] __do_softirq+0x84/0x1ec
        Call Trace:
        [eb79df90] [c003a410] __do_softirq+0x84/0x1ec (unreliable)
        [eb79dfe0] [c003a970] irq_exit+0xbc/0xc8
        [eb79dff0] [c000cc1c] call_do_irq+0x24/0x3c
        [ef441f20] [c00046a8] do_IRQ+0x8c/0xf8
        [ef441f40] [c000e7f4] ret_from_except+0x0/0x18
        --- Exception: 501 at 0xfcda524
            LR = 0x10024900
        Instruction dump:
        7c781b78 3b40000a 3a73b040 543c0024 3a800000 3b3913a0 7ef5bb78 48201bf9
        5463103a 7d3b182e 7e89b92e 7c008146 <3ba00000> 7e7e9b78 48000014 57fff87f
        Kernel panic - not syncing: kernel stack overflow
        CPU: 0 PID: 2838 Comm: ssh Not tainted 3.13.0-rc8-juniper-00146-g19eca00 #4
        Call Trace:
      
      The reason is that we have used the wrong register to calculate the
      ksp_limit in commit cbc9565e (powerpc: Remove ksp_limit on ppc64).
      Just fix it.
      
      As suggested by Benjamin Herrenschmidt, also add the C prototype of the
      function in the comment in order to avoid such kind of errors in the
      future.
      
      Cc: stable@vger.kernel.org # 3.12
      Reported-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarKevin Hao <haokexin@gmail.com>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      1a18a664
  2. 16 Feb, 2014 8 commits
    • Linus Torvalds's avatar
      Linux 3.14-rc3 · 6d0abeca
      Linus Torvalds authored
      6d0abeca
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 3962dfbe
      Linus Torvalds authored
      Pull btrfs fixes from Chris Mason:
       "We have a small collection of fixes in my for-linus branch.
      
        The big thing that stands out is a revert of a new ioctl.  Users
        haven't shipped yet in btrfs-progs, and Dave Sterba found a better way
        to export the information"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
        Btrfs: use right clone root offset for compressed extents
        btrfs: fix null pointer deference at btrfs_sysfs_add_one+0x105
        Btrfs: unset DCACHE_DISCONNECTED when mounting default subvol
        Btrfs: fix max_inline mount option
        Btrfs: fix a lockdep warning when cleaning up aborted transaction
        Revert "btrfs: add ioctl to export size of global metadata reservation"
      3962dfbe
    • Linus Torvalds's avatar
      Merge tag 'dt-fixes-for-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux · 4302a875
      Linus Torvalds authored
      Pull devicetree fixes from Rob Herring:
       "Fix booting on PPC boards.  Changes to of_match_node matching caused
        the serial port on some PPC boards to stop working.  Reverted the
        change and reimplement to split matching between new style compatible
        only matching and fallback to old matching algorithm"
      
      * tag 'dt-fixes-for-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
        of: search the best compatible match first in __of_match_node()
        Revert "OF: base: match each node compatible against all given matches first"
      4302a875
    • Kevin Hao's avatar
      of: search the best compatible match first in __of_match_node() · 06b29e76
      Kevin Hao authored
      Currently, of_match_node compares each given match against all node's
      compatible strings with of_device_is_compatible.
      
      To achieve multiple compatible strings per node with ordering from
      specific to generic, this requires given matches to be ordered from
      specific to generic. For most of the drivers this is not true and also
      an alphabetical ordering is more sane there.
      
      Therefore, this patch introduces a function to match each of the node's
      compatible strings against all given compatible matches without type and
      name first, before checking the next compatible string. This implies
      that node's compatibles are ordered from specific to generic while
      given matches can be in any order. If we fail to find such a match
      entry, then fall-back to the old method in order to keep compatibility.
      
      Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
      Signed-off-by: default avatarKevin Hao <haokexin@gmail.com>
      Tested-by: default avatarStephen Chivers <schivers@csc.com>
      Signed-off-by: default avatarRob Herring <robh@kernel.org>
      06b29e76
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 946dd683
      Linus Torvalds authored
      Pull SCSI target fixes from Nicholas Bellinger:
       "Mostly minor fixes this time to v3.14-rc1 related changes.  Also
        included is one fix for a free after use regression in persistent
        reservations UNREGISTER logic that is CC'ed to >= v3.11.y stable"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        Target/sbc: Fix protection copy routine
        IB/srpt: replace strict_strtoul() with kstrtoul()
        target: Simplify command completion by removing CMD_T_FAILED flag
        iser-target: Fix leak on failure in isert_conn_create_fastreg_pool
        iscsi-target: Fix SNACK Type 1 + BegRun=0 handling
        target: Fix missing length check in spc_emulate_evpd_83()
        qla2xxx: Remove last vestiges of qla_tgt_cmd.cmd_list
        target: Fix 32-bit + CONFIG_LBDAF=n link error w/ sector_div
        target: Fix free-after-use regression in PR unregister
      946dd683
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · 2d0ef4fb
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "i2c has a bugfix and documentation improvements for you"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        Documentation: i2c: mention ACPI method for instantiating devices
        Documentation: i2c: describe devicetree method for instantiating devices
        i2c: mv64xxx: refactor message start to ensure proper initialization
      2d0ef4fb
    • Linus Torvalds's avatar
      Merge branches 'irq-urgent-for-linus' and 'irq-core-for-linus' of... · 5a667a0c
      Linus Torvalds authored
      Merge branches 'irq-urgent-for-linus' and 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
      
      Pull irq update from Thomas Gleixner:
       "Fix from the urgent branch: a trivial oneliner adding the missing
        Kconfig dependency curing build failures which have been discovered by
        several build robots.
      
        The update in the irq-core branch provides a new function in the
        irq/devres code, which is a prerequisite for driver developers to get
        rid of boilerplate code all over the place.
      
        Not a bugfix, but it has zero impact on the current kernel due to the
        lack of users.  It's simpler to provide the infrastructure to
        interested parties via your tree than fulfilling the wishlist of
        driver maintainers on which particular commit or tag this should be
        based on"
      
      * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        genirq: Add missing irq_to_desc export for CONFIG_SPARSE_IRQ=n
      
      * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        genirq: Add devm_request_any_context_irq()
      5a667a0c
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 3a19c07c
      Linus Torvalds authored
      Pull timer fixes from Thomas Gleixner:
       "The following trilogy of patches brings you:
      
         - fix for a long standing math overflow issue with HZ < 60
      
         - an onliner fix for a corner case in the dreaded tick broadcast
           mechanism affecting a certain range of AMD machines which are
           infested with the infamous automagic C1E power control misfeature
      
         - a fix for one of the ARM platforms which allows the kernel to
           proceed and boot instead of stupidly panicing for no good reason.
           The patch is slightly larger than necessary, but it's less ugly
           than the alternative 5 liner"
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        tick: Clear broadcast pending bit when switching to oneshot
        clocksource: Kona: Print warning rather than panic
        time: Fix overflow when HZ is smaller than 60
      3a19c07c
  3. 15 Feb, 2014 13 commits
    • Linus Torvalds's avatar
      Merge tag 'trace-fixes-v3.14-rc2' of... · 9bd01b9b
      Linus Torvalds authored
      Merge tag 'trace-fixes-v3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
      
      Pull twi tracing fixes from Steven Rostedt:
       "Two urgent fixes in the tracing utility.
      
        The first is a fix for the way the ring buffer stores timestamps.
        After a restructure of the code was done, the ring buffer timestamp
        logic missed the fact that the first event on a sub buffer is to have
        a zero delta, as the full timestamp is stored on the sub buffer
        itself.  But because the delta was not cleared to zero, the timestamp
        for that event will be calculated as the real timestamp + the delta
        from the last timestamp.  This can skew the timestamps of the events
        and have them say they happened when they didn't really happen.
        That's bad.
      
        The second fix is for modifying the function graph caller site.  When
        the stop machine was removed from updating the function tracing code,
        it missed updating the function graph call site location.  It is still
        modified as if it is being done via stop machine.  But it's not.  This
        can lead to a GPF and kernel crash if the function graph call site
        happens to lie between cache lines and one CPU is executing it while
        another CPU is doing the update.  It would be a very hard condition to
        hit, but the result is severe enough to have it fixed ASAP"
      
      * tag 'trace-fixes-v3.14-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        ftrace/x86: Use breakpoints for converting function graph caller
        ring-buffer: Fix first commit on sub-buffer having non-zero delta
      9bd01b9b
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7fc92804
      Linus Torvalds authored
      Pull x86 EFI fixes from Peter Anvin:
       "A few more EFI-related fixes"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/efi: Check status field to validate BGRT header
        x86/efi: Fix 32-bit fallout
      7fc92804
    • Linus Torvalds's avatar
      Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 83660b73
      Linus Torvalds authored
      Pull ARM SoC fixes from Kevin Hilman:
       "A collection of ARM SoC fixes for v3.14-rc1.
      
        Mostly a collection of Kconfig, device tree data and compilation fixes
        along with fix to drivers/phy that fixes a boot regression on some
        Marvell mvebu platforms"
      
      * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        dma: mv_xor: Silence a bunch of LPAE-related warnings
        ARM: ux500: disable msp2 device tree node
        ARM: zynq: Reserve not DMAable space in front of the kernel
        ARM: multi_v7_defconfig: Select CONFIG_SOC_DRA7XX
        ARM: imx6: Initialize low-power mode early again
        ARM: pxa: fix various compilation problems
        ARM: pxa: fix compilation problem on AM300EPD board
        ARM: at91: add Atmel's SAMA5D3 Xplained board
        spi/atmel: document clock properties
        mmc: atmel-mci: document clock properties
        ARM: at91: enable USB host on at91sam9n12ek board
        ARM: at91/dt: fix sama5d3 ohci hclk clock reference
        ARM: at91/dt: sam9263: fix compatibility string for the I2C
        ata: sata_mv: Fix probe failures with optional phys
        drivers: phy: Add support for optional phys
        drivers: phy: Make NULL a valid phy reference
        ARM: fix HAVE_ARM_TWD selection for OMAP and shmobile
        ARM: moxart: move DMA_OF selection to driver
        ARM: hisi: fix kconfig warning on HAVE_ARM_TWD
      83660b73
    • Wolfram Sang's avatar
    • Wolfram Sang's avatar
    • Filipe David Borba Manana's avatar
      Btrfs: use right clone root offset for compressed extents · 93de4ba8
      Filipe David Borba Manana authored
      For non compressed extents, iterate_extent_inodes() gives us offsets
      that take into account the data offset from the file extent items, while
      for compressed extents it doesn't. Therefore we have to adjust them before
      placing them in a send clone instruction. Not doing this adjustment leads to
      the receiving end requesting for a wrong a file range to the clone ioctl,
      which results in different file content from the one in the original send
      root.
      
      Issue reproducible with the following excerpt from the test I made for
      xfstests:
      
        _scratch_mkfs
        _scratch_mount "-o compress-force=lzo"
      
        $XFS_IO_PROG -f -c "truncate 118811" $SCRATCH_MNT/foo
        $XFS_IO_PROG -c "pwrite -S 0x0d -b 39987 92267 39987" $SCRATCH_MNT/foo
      
        $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
      
        $XFS_IO_PROG -c "pwrite -S 0x3e -b 80000 200000 80000" $SCRATCH_MNT/foo
        $BTRFS_UTIL_PROG filesystem sync $SCRATCH_MNT
        $XFS_IO_PROG -c "pwrite -S 0xdc -b 10000 250000 10000" $SCRATCH_MNT/foo
        $XFS_IO_PROG -c "pwrite -S 0xff -b 10000 300000 10000" $SCRATCH_MNT/foo
      
        # will be used for incremental send to be able to issue clone operations
        $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/clones_snap
      
        $BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2
      
        $FSSUM_PROG -A -f -w $tmp/1.fssum $SCRATCH_MNT/mysnap1
        $FSSUM_PROG -A -f -w $tmp/2.fssum -x $SCRATCH_MNT/mysnap2/mysnap1 \
            -x $SCRATCH_MNT/mysnap2/clones_snap $SCRATCH_MNT/mysnap2
        $FSSUM_PROG -A -f -w $tmp/clones.fssum $SCRATCH_MNT/clones_snap \
            -x $SCRATCH_MNT/clones_snap/mysnap1 -x $SCRATCH_MNT/clones_snap/mysnap2
      
        $BTRFS_UTIL_PROG send $SCRATCH_MNT/mysnap1 -f $tmp/1.snap
        $BTRFS_UTIL_PROG send $SCRATCH_MNT/clones_snap -f $tmp/clones.snap
        $BTRFS_UTIL_PROG send -p $SCRATCH_MNT/mysnap1 \
            -c $SCRATCH_MNT/clones_snap $SCRATCH_MNT/mysnap2 -f $tmp/2.snap
      
        _scratch_unmount
        _scratch_mkfs
        _scratch_mount
      
        $BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/1.snap
        $FSSUM_PROG -r $tmp/1.fssum $SCRATCH_MNT/mysnap1 2>> $seqres.full
      
        $BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/clones.snap
        $FSSUM_PROG -r $tmp/clones.fssum $SCRATCH_MNT/clones_snap 2>> $seqres.full
      
        $BTRFS_UTIL_PROG receive $SCRATCH_MNT -f $tmp/2.snap
        $FSSUM_PROG -r $tmp/2.fssum $SCRATCH_MNT/mysnap2 2>> $seqres.full
      Signed-off-by: default avatarFilipe David Borba Manana <fdmanana@gmail.com>
      Signed-off-by: default avatarChris Mason <clm@fb.com>
      93de4ba8
    • Anand Jain's avatar
      btrfs: fix null pointer deference at btrfs_sysfs_add_one+0x105 · f085381e
      Anand Jain authored
      bdev is null when disk has disappeared and mounted with
      the degrade option
      
      stack trace
      ---------
      btrfs_sysfs_add_one+0x105/0x1c0 [btrfs]
      open_ctree+0x15f3/0x1fe0 [btrfs]
      btrfs_mount+0x5db/0x790 [btrfs]
      ? alloc_pages_current+0xa4/0x160
      mount_fs+0x34/0x1b0
      vfs_kern_mount+0x62/0xf0
      do_mount+0x22e/0xa80
      ? __get_free_pages+0x9/0x40
      ? copy_mount_options+0x31/0x170
      SyS_mount+0x7e/0xc0
      system_call_fastpath+0x16/0x1b
      ---------
      
      reproducer:
      -------
      mkfs.btrfs -draid1 -mraid1 /dev/sdc /dev/sdd
      (detach a disk)
      devmgt detach /dev/sdc [1]
      mount -o degrade /dev/sdd /btrfs
      -------
      
      [1] github.com/anajain/devmgt.git
      Signed-off-by: default avatarAnand Jain <Anand.Jain@oracle.com>
      Tested-by: default avatarHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
      Signed-off-by: default avatarChris Mason <clm@fb.com>
      f085381e
    • Wolfram Sang's avatar
      i2c: mv64xxx: refactor message start to ensure proper initialization · 79970db2
      Wolfram Sang authored
      Because the offload mechanism can fall back to a standard transfer,
      having two seperate initialization states is unfortunate. Let's just
      have one state which does things consistently. This fixes a bug where
      some preparation was missing when the fallback happened. And it makes
      the code much easier to follow. To implement this, we put the check
      if offload is possible at the top of the offload setup function.
      Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
      Tested-by: default avatarGregory CLEMENT <gregory.clement@free-electrons.com>
      Cc: stable@vger.kernel.org # v3.12+
      Fixes: 930ab3d4 (i2c: mv64xxx: Add I2C Transaction Generator support)
      79970db2
    • Linus Torvalds's avatar
      Merge tag 'usb-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · ca033390
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here is a bunch of USB fixes for 3.14-rc3.  Most of these are xhci
        reverts, fixing a bunch of reported issues with USB 3 host controller
        issues that loads of people have been hitting (with the exception of
        kernel developers, all of our machines seem to be working fine, which
        is why these took so long to get resolved...)
      
        There are some other minor fixes and new device ids, as ususal.  All
        have been in linux-next successfully"
      
      * tag 'usb-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (22 commits)
        usb: option: blacklist ZTE MF667 net interface
        Revert "usb: xhci: Link TRB must not occur within a USB payload burst"
        Revert "xhci: Avoid infinite loop when sg urb requires too many trbs"
        Revert "xhci: Set scatter-gather limit to avoid failed block writes."
        xhci 1.0: Limit arbitrarily-aligned scatter gather.
        Modpost: fixed USB alias generation for ranges including 0x9 and 0xA
        usb: core: Fix potential memory leak adding dyn USBdevice IDs
        USB: ftdi_sio: add Tagsys RFID Reader IDs
        usb: qcserial: add Netgear Aircard 340U
        usb-storage: enable multi-LUN scanning when needed
        USB: simple: add Dynastream ANT USB-m Stick device support
        usb-storage: add unusual-devs entry for BlackBerry 9000
        usb-storage: restrict bcdDevice range for Super Top in Cypress ATACB
        usb: phy: move some error messages to debug
        usb: ftdi_sio: add Mindstorms EV3 console adapter
        usb: dwc2: fix memory corruption in dwc2 driver
        usb: dwc2: fix role switch breakage
        usb: dwc2: bail out early when booting with "nousb"
        Revert "xhci: replace xhci_read_64() with readq()"
        Revert "xhci: replace xhci_write_64() with writeq()"
        ...
      ca033390
    • Linus Torvalds's avatar
      Merge tag 'tty-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 40a215fb
      Linus Torvalds authored
      Pull tty/serial driver fixes from Greg KH:
       "Here are a small number of tty/serial driver fixes to resolve reported
        issues with 3.14-rc and earlier (in the case of the vt bugfix).  Some
        of these have been tested and reported by a number of people as the
        tty bugfix was pretty commonly hit on some platforms.
      
        All have been in linux-next for a while"
      
      * tag 'tty-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        vt: Fix secure clear screen
        serial: 8250: Support XR17V35x fraction divisor
        n_tty: Fix stale echo output
        serial: sirf: fix kernel panic caused by unpaired spinlock
        serial: 8250_pci: unbreak last serial ports on NetMos 9865 cards
        n_tty: Fix poll() when TIME_CHAR and MIN_CHAR == 0
        serial: omap: fix rs485 probe on defered pinctrl
        serial: 8250_dw: fix compilation warning when !CONFIG_PM_SLEEP
        serial: omap-serial: Move info message to probe function
        tty: Set correct tty name in 'active' sysfs attribute
        tty: n_gsm: Fix for modems with brk in modem status control
        drivers/tty/hvc: don't use module_init in non-modular hyp. console code
      40a215fb
    • Linus Torvalds's avatar
      Merge tag 'staging-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · e2e481d6
      Linus Torvalds authored
      Pull staging driver fixes from Greg KH:
       "Here are a number (lots, I know) of fixes for staging drivers to
        resolve a bunch of reported issues.
      
        The largest patches here is one revert of a patch that is in 3.14-rc1
        to fix reported problems, and a sync of a usb host driver that
        required some ARM patches to go in before it could be accepted (which
        is why it missed -rc1)
      
        All of these have been in linux-next for a while with no reported
        issues"
      
      * tag 'staging-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (56 commits)
        staging/rtl8821ae: fix build, depends on MAC80211
        iio: max1363: Use devm_regulator_get_optional for optional regulator
        iio:accel:bma180: Use modifier instead of index in channel specification
        iio: adis16400: Set timestamp as the last element in chan_spec
        iio: ak8975: Fix calculation formula for convert micro tesla to gauss unit
        staging:iio:ad799x fix typo in ad799x_events[]
        iio: mxs-lradc: remove useless scale_available files
        iio: mxs-lradc: fix buffer overflow
        iio:magnetometer:mag3110: Fix output of decimal digits in show_int_plus_micros()
        iio:magnetometer:mag3110: Report busy in _read_raw() / write_raw() when buffer is enabled
        wlags49_h2: Fix overflow in wireless_set_essid()
        xlr_net: Fix missing trivial allocation check
        staging: r8188eu: overflow in rtw_p2p_get_go_device_address()
        staging: r8188eu: array overflow in rtw_mp_ioctl_hdl()
        staging: r8188eu: Fix typo in USB_DEVICE list
        usbip/userspace/libsrc/names.c: memory leak
        gpu: ion: dereferencing an ERR_PTR
        staging: comedi: usbduxsigma: fix unaligned dereferences
        staging: comedi: fix too early cleanup in comedi_auto_config()
        staging: android: ion: dummy: fix an error code
        ...
      e2e481d6
    • Linus Torvalds's avatar
      Merge tag 'driver-core-3.14-rc3' of... · ad07f124
      Linus Torvalds authored
      Merge tag 'driver-core-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
      
      Pull driver core fix from Greg KH:
       "Here is a single driver core patch for 3.14-rc3 for the component code
        that Russell has found and fixed"
      
      * tag 'driver-core-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
        drivers/base: fix devres handling for master device
      ad07f124
    • Linus Torvalds's avatar
      Merge tag 'char-misc-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · bb0a05d7
      Linus Torvalds authored
      Pull char/misc fixes from Greg KH:
       "Here are some small char/misc driver fixes, along with some
        documentation updates, for 3.14-rc3.  Nothing major, just a number of
        fixes for reported issues"
      
      * tag 'char-misc-3.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        Revert "misc: eeprom: sunxi: Add new compatibles"
        Revert "ARM: sunxi: dt: Convert to the new SID compatibles"
        misc: mic: fix possible signed underflow (undefined behavior) in userspace API
        ARM: sunxi: dt: Convert to the new SID compatibles
        misc: eeprom: sunxi: Add new compatibles
        misc: genwqe: Fix potential memory leak when pinning memory
        Documentation:Update Documentation/zh_CN/arm64/memory.txt
        Documentation:Update Documentation/zh_CN/arm64/booting.txt
        Documentation:Chinese translation of Documentation/arm64/tagged-pointers.txt
        raw: set range for MAX_RAW_DEVS
        raw: test against runtime value of max_raw_minors
        Drivers: hv: vmbus: Don't timeout during the initial connection with host
        Drivers: hv: vmbus: Specify the target CPU that should receive notification
        VME: Correct read/write alignment algorithm
        mei: don't unset read cb ptr on reset
        mei: clear write cb from waiting list on reset
      bb0a05d7
  4. 14 Feb, 2014 6 commits
    • Josef Bacik's avatar
      Btrfs: unset DCACHE_DISCONNECTED when mounting default subvol · 3a0dfa6a
      Josef Bacik authored
      A user was running into errors from an NFS export of a subvolume that had a
      default subvol set.  When we mount a default subvol we will use d_obtain_alias()
      to find an existing dentry for the subvolume in the case that the root subvol
      has already been mounted, or a dummy one is allocated in the case that the root
      subvol has not already been mounted.  This allows us to connect the dentry later
      on if we wander into the path.  However if we don't ever wander into the path we
      will keep DCACHE_DISCONNECTED set for a long time, which angers NFS.  It doesn't
      appear to cause any problems but it is annoying nonetheless, so simply unset
      DCACHE_DISCONNECTED in the get_default_root case and switch btrfs_lookup() to
      use d_materialise_unique() instead which will make everything play nicely
      together and reconnect stuff if we wander into the defaul subvol path from a
      different way.  With this patch I'm no longer getting the NFS errors when
      exporting a volume that has been mounted with a default subvol set.  Thanks,
      
      cc: bfields@fieldses.org
      cc: ebiederm@xmission.com
      Signed-off-by: default avatarJosef Bacik <jbacik@fb.com>
      Acked-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
      Signed-off-by: default avatarChris Mason <clm@fb.com>
      3a0dfa6a
    • Mitch Harder's avatar
      Btrfs: fix max_inline mount option · feb5f965
      Mitch Harder authored
      Currently, the only mount option for max_inline that has any effect is
      max_inline=0.  Any other value that is supplied to max_inline will be
      adjusted to a minimum of 4k.  Since max_inline has an effective maximum
      of ~3900 bytes due to page size limitations, the current behaviour
      only has meaning for max_inline=0.
      
      This patch will allow the the max_inline mount option to accept non-zero
      values as indicated in the documentation.
      Signed-off-by: default avatarMitch Harder <mitch.harder@sabayonlinux.org>
      Signed-off-by: default avatarChris Mason <clm@fb.com>
      feb5f965
    • Liu Bo's avatar
      Btrfs: fix a lockdep warning when cleaning up aborted transaction · a9d2d4ad
      Liu Bo authored
      Given now we have 2 spinlock for management of delayed refs,
      CONFIG_DEBUG_SPINLOCK=y helped me find this,
      
      [ 4723.413809] BUG: spinlock wrong CPU on CPU#1, btrfs-transacti/2258
      [ 4723.414882]  lock: 0xffff880048377670, .magic: dead4ead, .owner: btrfs-transacti/2258, .owner_cpu: 2
      [ 4723.417146] CPU: 1 PID: 2258 Comm: btrfs-transacti Tainted: G        W  O 3.12.0+ #4
      [ 4723.421321] Call Trace:
      [ 4723.421872]  [<ffffffff81680fe7>] dump_stack+0x54/0x74
      [ 4723.422753]  [<ffffffff81681093>] spin_dump+0x8c/0x91
      [ 4723.424979]  [<ffffffff816810b9>] spin_bug+0x21/0x26
      [ 4723.425846]  [<ffffffff81323956>] do_raw_spin_unlock+0x66/0x90
      [ 4723.434424]  [<ffffffff81689bf7>] _raw_spin_unlock+0x27/0x40
      [ 4723.438747]  [<ffffffffa015da9e>] btrfs_cleanup_one_transaction+0x35e/0x710 [btrfs]
      [ 4723.443321]  [<ffffffffa015df54>] btrfs_cleanup_transaction+0x104/0x570 [btrfs]
      [ 4723.444692]  [<ffffffff810c1b5d>] ? trace_hardirqs_on_caller+0xfd/0x1c0
      [ 4723.450336]  [<ffffffff810c1c2d>] ? trace_hardirqs_on+0xd/0x10
      [ 4723.451332]  [<ffffffffa015e5ee>] transaction_kthread+0x22e/0x270 [btrfs]
      [ 4723.452543]  [<ffffffffa015e3c0>] ? btrfs_cleanup_transaction+0x570/0x570 [btrfs]
      [ 4723.457833]  [<ffffffff81079efa>] kthread+0xea/0xf0
      [ 4723.458990]  [<ffffffff81079e10>] ? kthread_create_on_node+0x140/0x140
      [ 4723.460133]  [<ffffffff81692aac>] ret_from_fork+0x7c/0xb0
      [ 4723.460865]  [<ffffffff81079e10>] ? kthread_create_on_node+0x140/0x140
      [ 4723.496521] ------------[ cut here ]------------
      
      ----------------------------------------------------------------------
      
      The reason is that we get to call cond_resched_lock(&head_ref->lock) while
      still holding @delayed_refs->lock.
      
      So it's different with __btrfs_run_delayed_refs(), where we do drop-acquire
      dance before and after actually processing delayed refs.
      
      Here we don't drop the lock, others are not able to add new delayed refs to
      head_ref, so cond_resched_lock(&head_ref->lock) is not necessary here.
      Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
      Signed-off-by: default avatarChris Mason <clm@fb.com>
      a9d2d4ad
    • Chris Mason's avatar
      Revert "btrfs: add ioctl to export size of global metadata reservation" · 11bcac89
      Chris Mason authored
      This reverts commit 01e219e8.
      
      David Sterba found a different way to provide these features without adding a new
      ioctl.  We haven't released any progs with this ioctl yet, so I'm taking this out
      for now until we finalize things.
      Signed-off-by: default avatarChris Mason <clm@fb.com>
      Signed-off-by: default avatarDavid Sterba <dsterba@suse.cz>
      CC: Jeff Mahoney <jeffm@suse.com>
      11bcac89
    • Linus Torvalds's avatar
      Merge branch 'for-3.14' of git://linux-nfs.org/~bfields/linux · 8ba74517
      Linus Torvalds authored
      Pull two nfsd bugfixes from Bruce Fields.
      
      * 'for-3.14' of git://linux-nfs.org/~bfields/linux:
        lockd: send correct lock when granting a delayed lock.
        nfsd4: fix acl buffer overrun
      8ba74517
    • Linus Torvalds's avatar
      Merge tag 'md/3.14-fixes' of git://neil.brown.name/md · bd3813d5
      Linus Torvalds authored
      Pull md fixes from Neil Brown:
       "Two bugfixes for md
      
        both tagged for -stable"
      
      * tag 'md/3.14-fixes' of git://neil.brown.name/md:
        md/raid5: Fix CPU hotplug callback registration
        md/raid1: restore ability for check and repair to fix read errors.
      bd3813d5