1. 29 Jul, 2015 1 commit
    • Christoph Hellwig's avatar
      block: add a bi_error field to struct bio · 4246a0b6
      Christoph Hellwig authored
      
      
      Currently we have two different ways to signal an I/O error on a BIO:
      
       (1) by clearing the BIO_UPTODATE flag
       (2) by returning a Linux errno value to the bi_end_io callback
      
      The first one has the drawback of only communicating a single possible
      error (-EIO), and the second one has the drawback of not beeing persistent
      when bios are queued up, and are not passed along from child to parent
      bio in the ever more popular chaining scenario.  Having both mechanisms
      available has the additional drawback of utterly confusing driver authors
      and introducing bugs where various I/O submitters only deal with one of
      them, and the others have to add boilerplate code to deal with both kinds
      of error returns.
      
      So add a new bi_error field to store an errno value directly in struct
      bio and remove the existing mechanisms to clean all this up.
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
      Reviewed-by: default avatarNeilBrown <neilb@suse.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      4246a0b6
  2. 17 Jul, 2015 7 commits
    • Jens Axboe's avatar
      block: make /sys/block/<dev>/queue/discard_max_bytes writeable · 0034af03
      Jens Axboe authored
      
      
      Lots of devices support huge discard sizes these days. Depending
      on how the device handles them internally, huge discards can
      introduce massive latencies (hundreds of msec) on the device side.
      
      We have a sysfs file, discard_max_bytes, that advertises the max
      hardware supported discard size. Make this writeable, and split
      the settings into a soft and hard limit. This can be set from
      'discard_granularity' and up to the hardware limit.
      
      Add a new sysfs file, 'discard_max_hw_bytes', that shows the hw
      set limit.
      Reviewed-by: default avatarJeff Moyer <jmoyer@redhat.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      0034af03
    • Jens Axboe's avatar
      block: have drivers use blk_queue_max_discard_sectors() · 2bb4cd5c
      Jens Axboe authored
      
      
      Some drivers use it now, others just set the limits field manually.
      But in preparation for splitting this into a hard and soft limit,
      ensure that they all call the proper function for setting the hw
      limit for discards.
      Reviewed-by: default avatarJeff Moyer <jmoyer@redhat.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      2bb4cd5c
    • Ming Lei's avatar
      block: partition: convert percpu ref · 6c71013e
      Ming Lei authored
      
      
      Percpu refcount is the perfect match for partition's case,
      and the conversion is quite straight.
      
      With the convertion, one pair of atomic inc/dec can be saved
      for accounting block I/O, which is run in hot path of block I/O.
      Signed-off-by: default avatarMing Lei <tom.leiming@gmail.com>
      Acked-by: default avatarTejun Heo <tj@kernel.org>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      6c71013e
    • Ming Lei's avatar
      block: partition: introduce hd_free_part() · b54e5ed8
      Ming Lei authored
      
      
      So the helper can be used in both generic partition
      case and part0 case.
      Signed-off-by: default avatarMing Lei <tom.leiming@gmail.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      b54e5ed8
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-4.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 21bdb584
      Linus Torvalds authored
      Pull power management and ACPI fixes from Rafael Wysocki:
       "These fix two bugs in the cpufreq core (including one recent
        regression), fix a 4.0 PCI regression related to the ACPI resources
        management and quieten an RCU-related lockdep complaint about a
        tracepoint in the suspend-to-idle code.
      
        Specifics:
      
         - Fix a recently introduced issue in the cpufreq policy object
           reinitialization that leads to CPU offline/online breakage (Viresh
           Kumar)
      
         - Make it possible to access frequency tables of offline CPUs which
           is needed by thermal management code among other things (Viresh
           Kumar)
      
         - Fix an ACPI resource management regression introduced during the
           4.0 cycle that may cause incorrect resource validation results to
           appear in 32-bit x86 kernels due to silent truncation of 64-bit
           values to 32-bit (Jiang Liu)
      
         - Fix up an RCU-related lockdep complaint about suspicious RCU usage
           in idle caused by using a suspend tracepoint in the core suspend-
           to-idle code (Rafael J Wysocki)"
      
      * tag 'pm+acpi-4.2-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        ACPI / PCI: Fix regressions caused by resource_size_t overflow with 32-bit kernel
        cpufreq: Allow freq_table to be obtained for offline CPUs
        cpufreq: Initialize the governor again while restoring policy
        suspend-to-idle: Prevent RCU from complaining about tick_freeze()
      21bdb584
    • Linus Torvalds's avatar
      Merge tag 'platform-drivers-x86-v4.2-3' of... · 3e87ee06
      Linus Torvalds authored
      Merge tag 'platform-drivers-x86-v4.2-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
      
      Pull x86 platform driver fixes from Darren Hart:
       "Fix SMBIOS call handling and hwswitch state coherency in the
        dell-laptop driver.  Cleanups for intel_*_ipc drivers.  Details:
      
        dell-laptop:
         - Do not cache hwswitch state
         - Check return value of each SMBIOS call
         - Clear buffer before each SMBIOS call
      
        intel_scu_ipc:
         - Move local memory initialization out of a mutex
      
        intel_pmc_ipc:
         - Update kerneldoc formatting
         - Fix compiler casting warnings"
      
      * tag 'platform-drivers-x86-v4.2-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86:
        intel_scu_ipc: move local memory initialization out of a mutex
        intel_pmc_ipc: Update kerneldoc formatting
        dell-laptop: Do not cache hwswitch state
        dell-laptop: Check return value of each SMBIOS call
        dell-laptop: Clear buffer before each SMBIOS call
        intel_pmc_ipc: Fix compiler casting warnings
      3e87ee06
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu · f85c7124
      Linus Torvalds authored
      Pull m68knommu/coldfire fixes from Greg Ungerer:
       "Contains build fixes and updates for the ColdFire defconfigs.
      
        Specifically there is a couple of fixes that address problems building
        allnoconfig.  Also fix for enabling PCI bus on the M54xx family of
        ColdFire"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
        m68k: enable PCI support for m5475evb defconfig
        m68k: fix io functions for ColdFire/MMU/PCI case
        m68knommu: update defconfig for ColdFire m5475evb
        m68knommu: update defconfig for ColdFire m5407c3
        m68knommu: update defconfig for ColdFire m5307c3
        m68knommu: update defconfig for ColdFire m5275evb
        m68knommu: update defconfig for ColdFire m5272c3
        m68knommu: update defconfig for ColdFire m5249evb
        m68knommu: update defconfig for m5208evb
        m68knommu: make ColdFire SoC selection a choice
        m68knommu: improve the clock configuration defaults
        m68knommu: force setting of CONFIG_CLOCK_FREQ for ColdFire
      f85c7124
  3. 16 Jul, 2015 6 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 761ab766
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A collection of fixes from the last few weeks that should go into the
        current series.  This contains:
      
         - Various fixes for the per-blkcg policy data, fixing regressions
           since 4.1.  From Arianna and Tejun
      
         - Code cleanup for bcache closure macros from me.  Really just
           flushing this out, it's been sitting in another branch for months
      
         - FIELD_SIZEOF cleanup from Maninder Singh
      
         - bio integrity oops fix from Mike
      
         - Timeout regression fix for blk-mq from Ming Lei"
      
      * 'for-linus' of git://git.kernel.dk/linux-block:
        blk-mq: set default timeout as 30 seconds
        NVMe: Reread partitions on metadata formats
        bcache: don't embed 'return' statements in closure macros
        blkcg: fix blkcg_policy_data allocation bug
        blkcg: implement all_blkcgs list
        blkcg: blkcg_css_alloc() should grab blkcg_pol_mutex while iterating blkcg_policy[]
        blkcg: allow blkcg_pol_mutex to be grabbed from cgroup [file] methods
        block/blk-cgroup.c: free per-blkcg data when freeing the blkcg
        block: use FIELD_SIZEOF to calculate size of a field
        bio integrity: do not assume bio_integrity_pool exists if bioset exists
      761ab766
    • Linus Torvalds's avatar
      Merge tag 'jfs-4.2' of git://github.com/kleikamp/linux-shaggy · f76d94de
      Linus Torvalds authored
      Pull jfs fixes from David Kleikamp:
       "A couple trivial fixes and an error path fix"
      
      * tag 'jfs-4.2' of git://github.com/kleikamp/linux-shaggy:
        jfs: clean up jfs_rename and fix out of order unlock
        jfs: fix indentation on if statement
        jfs: removed a prohibited space after opening parenthesis
      f76d94de
    • Rafael J. Wysocki's avatar
      Merge branches 'pm-cpuidle', 'pm-cpufreq' and 'acpi-resources' · 17ffc8b0
      Rafael J. Wysocki authored
      * pm-cpuidle:
        suspend-to-idle: Prevent RCU from complaining about tick_freeze()
      
      * pm-cpufreq:
        cpufreq: Allow freq_table to be obtained for offline CPUs
        cpufreq: Initialize the governor again while restoring policy
      
      * acpi-resources:
        ACPI / PCI: Fix regressions caused by resource_size_t overflow with 32-bit kernel
      17ffc8b0
    • Ming Lei's avatar
      blk-mq: set default timeout as 30 seconds · e56f698b
      Ming Lei authored
      
      
      It is reasonable to set default timeout of request as 30 seconds instead of
      30000 ticks, which may be 300 seconds if HZ is 100, for example, some arm64
      based systems may choose 100 HZ.
      Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
      Fixes: c76cbbcf
      
       ("blk-mq: put blk_queue_rq_timeout together in blk_mq_init_queue()"
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      e56f698b
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security · 3aa20508
      Linus Torvalds authored
      Pull TPM bugfixes from James Morris.
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
        tpm, tpm_crb: fail when TPM2 ACPI table contents look corrupted
        tpm: Fix initialization of the cdev
      3aa20508
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma · 9090fdb9
      Linus Torvalds authored
      Pull rdma fixes from Doug Ledford:
       "Mainly fix-ups for the various 4.2 items"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (24 commits)
        IB/core: Destroy ocrdma_dev_id IDR on module exit
        IB/core: Destroy multcast_idr on module exit
        IB/mlx4: Optimize do_slave_init
        IB/mlx4: Fix memory leak in do_slave_init
        IB/mlx4: Optimize freeing of items on error unwind
        IB/mlx4: Fix use of flow-counters for process_mad
        IB/ipath: Convert use of __constant_<foo> to <foo>
        IB/ipoib: Set MTU to max allowed by mode when mode changes
        IB/ipoib: Scatter-Gather support in connected mode
        IB/ucm: Fix bitmap wrap when devnum > IB_UCM_MAX_DEVICES
        IB/ipoib: Prevent lockdep warning in __ipoib_ib_dev_flush
        IB/ucma: Fix lockdep warning in ucma_lock_files
        rds: rds_ib_device.refcount overflow
        RDMA/nes: Fix for incorrect recording of the MAC address
        RDMA/nes: Fix for resolving the neigh
        RDMA/core: Fixes for port mapper client registration
        IB/IPoIB: Fix bad error flow in ipoib_add_port()
        IB/mlx4: Do not attemp to report HCA clock offset on VFs
        IB/cm: Do not queue work to a device that's going away
        IB/srp: Avoid using uninitialized variable
        ...
      9090fdb9
  4. 15 Jul, 2015 9 commits
    • Keith Busch's avatar
      NVMe: Reread partitions on metadata formats · 7bee6074
      Keith Busch authored
      
      
      This patch has the driver automatically reread partitions if a namespace
      has a separate metadata format. Previously revalidating a disk was
      sufficient to get the correct capacity set on such formatted drives,
      but partitions that may exist would not have been surfaced.
      Reported-by: default avatarPaul Grabinar <paul.grabinar@ranbarg.com>
      Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
      Cc: Matthew Wilcox <willy@linux.intel.com>
      Tested-by: default avatarPaul Grabinar <paul.grabinar@ranbarg.com>
      Signed-off-by: default avatarJens Axboe <axboe@fb.com>
      7bee6074
    • Linus Torvalds's avatar
      Merge tag 'locks-v4.2-1' of git://git.samba.org/jlayton/linux · 16ff49a0
      Linus Torvalds authored
      
      
      Pull file locking updates from Jeff Layton:
       "I had thought that I was going to get away without a pull request this
        cycle.  There was a NFSv4 file locking problem that cropped up that I
        tried to fix in the NFSv4 code alone, but that fix has turned out to
        be problematic.  These patches fix this in the correct way.
      
        Note that this touches some NFSv4 code as well.  Ordinarily I'd wait
        for Trond to ACK this, but he's on holiday right now and the bug is
        rather nasty.  So I suggest we merge this and if he raises issues with
        it we can sort it out when he gets back"
      Acked-by: default avatarBruce Fields <bfields@fieldses.org>
      Acked-by: default avatarDan Williams <dan.j.williams@intel.com>
       [ +1 to this series fixing a 100% reproducible slab corruption +
         general protection fault in my nfs-root test environment. - Dan ]
      Acked-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
      
      * tag 'locks-v4.2-1' of git://git.samba.org/jlayton/linux:
        locks: inline posix_lock_file_wait and flock_lock_file_wait
        nfs4: have do_vfs_lock take an inode pointer
        locks: new helpers - flock_lock_inode_wait and posix_lock_inode_wait
        locks: have flock_lock_file take an inode pointer instead of a filp
        Revert "nfs: take extra reference to fl->fl_file when running a LOCKU operation"
      16ff49a0
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · df14a68d
      Linus Torvalds authored
      Pull KVM fixes from Paolo Bonzini:
      
       - Fix FPU refactoring ("kvm: x86: fix load xsave feature warning")
      
       - Fix eager FPU mode (Cc stable)
      
       - AMD bits of MTRR virtualization
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        kvm: x86: fix load xsave feature warning
        KVM: x86: apply guest MTRR virtualization on host reserved pages
        KVM: SVM: Sync g_pat with guest-written PAT value
        KVM: SVM: use NPT page attributes
        KVM: count number of assigned devices
        KVM: VMX: fix vmwrite to invalid VMCS
        KVM: x86: reintroduce kvm_is_mmio_pfn
        x86: hyperv: add CPUID bit for crash handlers
      df14a68d
    • Linus Torvalds's avatar
      Merge tag 'arc-v4.2-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc · bec33cd2
      Linus Torvalds authored
      Pull ARC fixes from Vineet Gupta:
       - Makefile changes (top-level+ARC) reinstates -O3 builds (regression
         since 3.16)
       - IDU intc related fixes, IRQ affinity
       - patch to make bitops safer for ARC
       - perf fix from Alexey to remove signed PC braino
       - Futex backend gets llock/scond support
      
      * tag 'arc-v4.2-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
        ARCv2: support HS38 releases
        ARC: make sure instruction_pointer() returns unsigned value
        ARC: slightly refactor macros for boot logging
        ARC: Add llock/scond to futex backend
        arc:irqchip: prepare for drivers/irqchip/irqchip.h removal
        ARC: Make ARC bitops "safer" (add anti-optimization)
        ARCv2: [axs103] bump CPU frequency from 75 to 90 MHZ
        ARCv2: intc: IDU: Fix potential race in installing a chained IRQ handler
        ARCv2: intc: IDU: support irq affinity
        ARC: fix unused var wanring
        ARC: Don't memzero twice in dma_alloc_coherent for __GFP_ZERO
        ARC: Override toplevel default -O2 with -O3
        kbuild: Allow arch Makefiles to override {cpp,ld,c}flags
        ARCv2: guard SLC DMA ops with spinlock
        ARC: Kconfig: better way to disable ARC_HAS_LLSC for ARC_CPU_750D
      bec33cd2
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 9c69481e
      Linus Torvalds authored
      Pull s390 fixes from Martin Schwidefsky:
       "One improvement for the zcrypt driver, the quality attribute for the
        hwrng device has been missing.  Without it the kernel entropy seeding
        will not happen automatically.
      
        And six bug fixes, the most important one is the fix for the vector
        register corruption due to machine checks"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/nmi: fix vector register corruption
        s390/process: fix sfpc inline assembly
        s390/dasd: fix kernel panic when alias is set offline
        s390/sclp: clear upper register halves in _sclp_print_early
        s390/oprofile: fix compile error
        s390/sclp: fix compile error
        s390/zcrypt: enable s390 hwrng to seed kernel entropy
      9c69481e
    • Dave Kleikamp's avatar
      jfs: clean up jfs_rename and fix out of order unlock · 26456955
      Dave Kleikamp authored
      
      
      The end of jfs_rename(), which is also used by the error paths,
      included a call to IWRITE_UNLOCK(new_ip) after labels out1, out2
      and out3. If we come in through these labels, IWRITE_LOCK() has not
      been called yet.
      
      In moving that call to the correct spot, I also moved some
      exceptional truncate code earlier as well, since the early error
      paths don't need to deal with it, and I renamed out4: to out_tx: so
      a future patch by Jan Kara doesn't need to deal with renumbering or
      confusing out-of-order labels.
      Signed-off-by: default avatarDave Kleikamp <dave.kleikamp@oracle.com>
      26456955
    • Linus Torvalds's avatar
      Merge tag 'module-final-v4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux · 97d6e2b6
      Linus Torvalds authored
      Pull final init.h/module.h code relocation from Paul Gortmaker:
       "With the release of 4.2-rc2 done, we should not be seeing any new code
        added that gets upset by this small code move, and we've banked yet
        another complete week of testing with this move in place on top of
        4.2-rc1 via linux-next to ensure that remained true.
      
        Given that, I'd like to put it in now so that people formulating new
        work for 4.3-rc1 will be exposed to the ever so slightly stricter (but
        sensible) requirements wrt.  whether they are needing init.h vs.
        module.h macros, even if they are not using linux-next.
      
        The diffstat of the move is slightly asymmetrical due to needing to
        leave behind a couple #ifdef in the old location and add the same ones
        to the new location, but other than that, it is a 1:1 move, complete
        with the module_init/exit trailing semicolon that we can't fix.  That
        is, until/unless someone does a tree-wide sed fix of all the
        approximately 800 currently in tree users relying on it"
      
      * tag 'module-final-v4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux:
        module: relocate module_init from init.h to module.h
      97d6e2b6
    • Linus Torvalds's avatar
      Merge tag 'trace-v4.2-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 75580097
      Linus Torvalds authored
      Pull tracing fix from Steven Rostedt:
       "Fengguang Wu discovered a crash that happened to be because of the
        branch tracer (traces unlikely and likely branches) when enabled with
        certain debug options.
      
        What happened was that various debug options like lockdep and
        DEBUG_PREEMPT can cause parts of the branch tracer to recurse outside
        its recursion protection.  In fact, part of its recursion protection
        used these features that caused the lockup.  This cleans up the code a
        little and makes the recursion protection a bit more robust"
      
      * tag 'trace-v4.2-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        tracing: Have branch tracer use recursive field of task struct
      75580097
    • James Morris's avatar
  5. 14 Jul, 2015 17 commits
    • Christophe JAILLET's avatar
      intel_scu_ipc: move local memory initialization out of a mutex · 8642d7f8
      Christophe JAILLET authored
      
      
      '{ }' and memset will both reset the cbuf buffer.
      Only once is enough and this can be done outside fo the mutex.
      Signed-off-by: default avatarChristophe JAILLET <christophe.jaillet@wanadoo.fr>
      Signed-off-by: default avatarDarren Hart <dvhart@linux.intel.com>
      8642d7f8
    • Johannes Thumshirn's avatar
      IB/core: Destroy ocrdma_dev_id IDR on module exit · d8b2ba7c
      Johannes Thumshirn authored
      
      
      Destroy ocrdma_dev_id IDR on module exit, reclaiming the allocated memory.
      
      This was detected by the following semantic patch (written by Luis Rodriguez
      <mcgrof@suse.com>)
      <SmPL>
      @ defines_module_init @
      declarer name module_init, module_exit;
      declarer name DEFINE_IDR;
      identifier init;
      @@
      
      module_init(init);
      
      @ defines_module_exit @
      identifier exit;
      @@
      
      module_exit(exit);
      
      @ declares_idr depends on defines_module_init && defines_module_exit @
      identifier idr;
      @@
      
      DEFINE_IDR(idr);
      
      @ on_exit_calls_destroy depends on declares_idr && defines_module_exit @
      identifier declares_idr.idr, defines_module_exit.exit;
      @@
      
      exit(void)
      {
       ...
       idr_destroy(&idr);
       ...
      }
      
      @ missing_module_idr_destroy depends on declares_idr && defines_module_exit && !on_exit_calls_destroy @
      identifier declares_idr.idr, defines_module_exit.exit;
      @@
      
      exit(void)
      {
       ...
       +idr_destroy(&idr);
       }
      
      </SmPL>
      Signed-off-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      d8b2ba7c
    • Johannes Thumshirn's avatar
      IB/core: Destroy multcast_idr on module exit · 45d25420
      Johannes Thumshirn authored
      
      
      Destroy multcast_idr on module exit, reclaiming the allocated memory.
      
      This was detected by the following semantic patch (written by Luis Rodriguez
      <mcgrof@suse.com>)
      <SmPL>
      @ defines_module_init @
      declarer name module_init, module_exit;
      declarer name DEFINE_IDR;
      identifier init;
      @@
      
      module_init(init);
      
      @ defines_module_exit @
      identifier exit;
      @@
      
      module_exit(exit);
      
      @ declares_idr depends on defines_module_init && defines_module_exit @
      identifier idr;
      @@
      
      DEFINE_IDR(idr);
      
      @ on_exit_calls_destroy depends on declares_idr && defines_module_exit @
      identifier declares_idr.idr, defines_module_exit.exit;
      @@
      
      exit(void)
      {
       ...
       idr_destroy(&idr);
       ...
      }
      
      @ missing_module_idr_destroy depends on declares_idr && defines_module_exit && !on_exit_calls_destroy @
      identifier declares_idr.idr, defines_module_exit.exit;
      @@
      
      exit(void)
      {
       ...
       +idr_destroy(&idr);
      }
      
      </SmPL>
      Signed-off-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      45d25420
    • Doug Ledford's avatar
      IB/mlx4: Optimize do_slave_init · d9a047ae
      Doug Ledford authored
      
      
      There is little chance our memory allocation will fail, so we can
      combine initializing the work structs with allocating them instead of
      looping through all of them once to allocate and again to initialize.
      Then when we need to actually find out if our device is up or in the
      process of going down, have all of our work structs batched up, take the
      spin_lock once and only once, and do all of the batch under the one
      spin_lock invocation instead of incurring all of the locked memory cycles
      we would otherwise incur to take/release the spin_lock over and over
      again.
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      d9a047ae
    • Doug Ledford's avatar
      IB/mlx4: Fix memory leak in do_slave_init · 9bbf282d
      Doug Ledford authored
      
      
      We create a number of work structs to be queued up to a workqueue, and
      on completion of the workqueue handler, the workqueue handler frees the
      allocated memory.  If, however, we don't queue the work struct because
      the device is going down, then we need to free the memory ourselves.
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      9bbf282d
    • Maninder Singh's avatar
      IB/mlx4: Optimize freeing of items on error unwind · a39a98ff
      Maninder Singh authored
      
      
      On failure, we loop through all possible pointers and test them before
      calling kfree.  But really, why even attempt to free items we didn't
      allocate when we can easily loop through exactly and only the devices
      for which the original memory allocation succeeded and free just those.
      Signed-off-by: default avatarManinder Singh <maninder1.s@samsung.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      a39a98ff
    • Or Gerlitz's avatar
      IB/mlx4: Fix use of flow-counters for process_mad · 43bfb972
      Or Gerlitz authored
      For IB links, reading HCA flow counters through iboe_process_mad() should
      be used when mlx4_ib_process_mad() is invoked only for VFs PMA queries and
      exactly nothing else.
      
      Fixes: 7193a141
      
       ('IB/mlx4: Set VF to read from QP counters')
      Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      43bfb972
    • Vaishali Thakkar's avatar
      IB/ipath: Convert use of __constant_<foo> to <foo> · cb1ff431
      Vaishali Thakkar authored
      
      
      In little endian cases, the macros be16_to_cpu and cpu_to_be64
      unfolds to __swab{16,64} which provides special case for constants.
      In big endian cases, __constant_be16_to_cpu and be16_to_cpu
      expand directly to the same expression. The same applies for
      __constant_cpu_to_be64 and cpu_to_be64.
      
      So, replace __constant_be16_to_cpu with be16_to_cpu and
      __constant_cpu_to_be64 with cpu_to_be64, with the goal of getting
      rid of the definition of __constant_be16_to_cpu and
      __constant_cpu_to_be64 completely.
      Signed-off-by: default avatarVaishali Thakkar <vthakkar1994@gmail.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      cb1ff431
    • Erez Shitrit's avatar
      IB/ipoib: Set MTU to max allowed by mode when mode changes · edcd2a74
      Erez Shitrit authored
      
      
      When switching between modes (datagram / connected) change the MTU
      accordingly.
      datagram mode up to 4K, connected mode up to (64K - 0x10).
      Signed-off-by: default avatarELi Cohen <eli@mellanox.com>
      Signed-off-by: default avatarErez Shitrit <erezsh@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      edcd2a74
    • Yuval Shaia's avatar
      IB/ipoib: Scatter-Gather support in connected mode · c4268778
      Yuval Shaia authored
      By default, IPoIB-CM driver uses 64k MTU. Larger MTU gives better
      performance.
      This MTU plus overhead puts the memory allocation for IP based packets at
      32 4k pages (order 5), which have to be contiguous.
      When the system memory under pressure, it was observed that allocating 128k
      contiguous physical memory is difficult and causes serious errors (such as
      system becomes unusable).
      
      This enhancement resolve the issue by removing the physically contiguous
      memory requirement using Scatter/Gather feature that exists in Linux stack.
      
      With this fix Scatter-Gather will be supported also in connected mode.
      
      This change reverts some of the change made in commit e112373f
      ("IPoIB/cm: Reduce connected mode TX object size").
      
      The ability to use SG in IPoIB CM is possible because the coupling
      between NETIF_F_SG and NETIF_F_CSUM was removed in commit
      ec5f0615
      
       ("net: Kill link between CSUM and SG features.")
      Signed-off-by: default avatarYuval Shaia <yuval.shaia@oracle.com>
      Acked-by: default avatarChristian Marie <christian@ponies.io>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      c4268778
    • Carol L Soto's avatar
      IB/ucm: Fix bitmap wrap when devnum > IB_UCM_MAX_DEVICES · 59d40dd9
      Carol L Soto authored
      
      
      ib_ucm_release_dev clears the wrong bit if devnum is greater
      than IB_UCM_MAX_DEVICES.
      Signed-off-by: default avatarCarol L Soto <clsoto@linux.vnet.ibm.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      59d40dd9
    • Haggai Eran's avatar
      IB/ipoib: Prevent lockdep warning in __ipoib_ib_dev_flush · 8b7cce0d
      Haggai Eran authored
      
      
      __ipoib_ib_dev_flush calls itself recursively on child devices, and lockdep
      complains about locking vlan_rwsem twice (see below). Use down_read_nested
      instead of down_read to prevent the warning.
      
       =============================================
       [ INFO: possible recursive locking detected ]
       4.1.0-rc4+ #36 Tainted: G           O
       ---------------------------------------------
       kworker/u20:2/261 is trying to acquire lock:
        (&priv->vlan_rwsem){.+.+..}, at: [<ffffffffa0791e2a>] __ipoib_ib_dev_flush+0x3a/0x2b0 [ib_ipoib]
      
       but task is already holding lock:
        (&priv->vlan_rwsem){.+.+..}, at: [<ffffffffa0791e2a>] __ipoib_ib_dev_flush+0x3a/0x2b0 [ib_ipoib]
      
       other info that might help us debug this:
        Possible unsafe locking scenario:
      
              CPU0
              ----
         lock(&priv->vlan_rwsem);
         lock(&priv->vlan_rwsem);
      
        *** DEADLOCK ***
      
        May be due to missing lock nesting notation
      
       3 locks held by kworker/u20:2/261:
        #0:  ("%s""ipoib_flush"){.+.+..}, at: [<ffffffff810827cc>] process_one_work+0x15c/0x760
        #1:  ((&priv->flush_heavy)){+.+...}, at: [<ffffffff810827cc>] process_one_work+0x15c/0x760
        #2:  (&priv->vlan_rwsem){.+.+..}, at: [<ffffffffa0791e2a>] __ipoib_ib_dev_flush+0x3a/0x2b0 [ib_ipoib]
      
       stack backtrace:
       CPU: 3 PID: 261 Comm: kworker/u20:2 Tainted: G           O    4.1.0-rc4+ #36
       Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
       Workqueue: ipoib_flush ipoib_ib_dev_flush_heavy [ib_ipoib]
        ffff8801c6c54790 ffff8801c9927af8 ffffffff81665238 0000000000000001
        ffffffff825b5b30 ffff8801c9927bd8 ffffffff810bba51 ffff880100000000
        ffffffff00000001 ffff880100000001 ffff8801c6c55428 ffff8801c6c54790
       Call Trace:
        [<ffffffff81665238>] dump_stack+0x4f/0x6f
        [<ffffffff810bba51>] __lock_acquire+0x741/0x1820
        [<ffffffff810bcbf8>] lock_acquire+0xc8/0x240
        [<ffffffffa0791e2a>] ? __ipoib_ib_dev_flush+0x3a/0x2b0 [ib_ipoib]
        [<ffffffff81669d2c>] down_read+0x4c/0x70
        [<ffffffffa0791e2a>] ? __ipoib_ib_dev_flush+0x3a/0x2b0 [ib_ipoib]
        [<ffffffffa0791e2a>] __ipoib_ib_dev_flush+0x3a/0x2b0 [ib_ipoib]
        [<ffffffffa0791e4a>] __ipoib_ib_dev_flush+0x5a/0x2b0 [ib_ipoib]
        [<ffffffffa07920ba>] ipoib_ib_dev_flush_heavy+0x1a/0x20 [ib_ipoib]
        [<ffffffff81082871>] process_one_work+0x201/0x760
        [<ffffffff810827cc>] ? process_one_work+0x15c/0x760
        [<ffffffff81082ef0>] worker_thread+0x120/0x4d0
        [<ffffffff81082dd0>] ? process_one_work+0x760/0x760
        [<ffffffff81082dd0>] ? process_one_work+0x760/0x760
        [<ffffffff81088b7e>] kthread+0xfe/0x120
        [<ffffffff81088a80>] ? __init_kthread_worker+0x70/0x70
        [<ffffffff8166c6e2>] ret_from_fork+0x42/0x70
        [<ffffffff81088a80>] ? __init_kthread_worker+0x70/0x70
      Signed-off-by: default avatarHaggai Eran <haggaie@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      8b7cce0d
    • Haggai Eran's avatar
      IB/ucma: Fix lockdep warning in ucma_lock_files · 31b57b87
      Haggai Eran authored
      
      
      The ucma_lock_files() locks the mut mutex on two files, e.g. for migrating
      an ID. Use mutex_lock_nested() to prevent the warning below.
      
       =============================================
       [ INFO: possible recursive locking detected ]
       4.1.0-rc6-hmm+ #40 Tainted: G           O
       ---------------------------------------------
       pingpong_rpc_se/10260 is trying to acquire lock:
        (&file->mut){+.+.+.}, at: [<ffffffffa047ac55>] ucma_migrate_id+0xc5/0x248 [rdma_ucm]
      
       but task is already holding lock:
        (&file->mut){+.+.+.}, at: [<ffffffffa047ac4b>] ucma_migrate_id+0xbb/0x248 [rdma_ucm]
      
       other info that might help us debug this:
        Possible unsafe locking scenario:
      
              CPU0
              ----
         lock(&file->mut);
         lock(&file->mut);
      
        *** DEADLOCK ***
      
        May be due to missing lock nesting notation
      
       1 lock held by pingpong_rpc_se/10260:
        #0:  (&file->mut){+.+.+.}, at: [<ffffffffa047ac4b>] ucma_migrate_id+0xbb/0x248 [rdma_ucm]
      
       stack backtrace:
       CPU: 0 PID: 10260 Comm: pingpong_rpc_se Tainted: G           O    4.1.0-rc6-hmm+ #40
       Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
        ffff8801f85b63d0 ffff880195677b58 ffffffff81668f49 0000000000000001
        ffffffff825cbbe0 ffff880195677c38 ffffffff810bb991 ffff880100000000
        ffff880100000000 ffff880100000001 ffff8801f85b7010 ffffffff8121bee9
       Call Trace:
        [<ffffffff81668f49>] dump_stack+0x4f/0x6e
        [<ffffffff810bb991>] __lock_acquire+0x741/0x1820
        [<ffffffff8121bee9>] ? dput+0x29/0x320
        [<ffffffff810bcb38>] lock_acquire+0xc8/0x240
        [<ffffffffa047ac55>] ? ucma_migrate_id+0xc5/0x248 [rdma_ucm]
        [<ffffffff8166b901>] ? mutex_lock_nested+0x291/0x3e0
        [<ffffffff8166b6d5>] mutex_lock_nested+0x65/0x3e0
        [<ffffffffa047ac55>] ? ucma_migrate_id+0xc5/0x248 [rdma_ucm]
        [<ffffffff810baeed>] ? trace_hardirqs_on+0xd/0x10
        [<ffffffff8166b66e>] ? mutex_unlock+0xe/0x10
        [<ffffffffa047ac55>] ucma_migrate_id+0xc5/0x248 [rdma_ucm]
        [<ffffffffa0478474>] ucma_write+0xa4/0xb0 [rdma_ucm]
        [<ffffffff81200674>] __vfs_write+0x34/0x100
        [<ffffffff8112427c>] ? __audit_syscall_entry+0xac/0x110
        [<ffffffff810ec055>] ? current_kernel_time+0xc5/0xe0
        [<ffffffff812aa4d3>] ? security_file_permission+0x23/0x90
        [<ffffffff8120088d>] ? rw_verify_area+0x5d/0xe0
        [<ffffffff812009bb>] vfs_write+0xab/0x120
        [<ffffffff81201519>] SyS_write+0x59/0xd0
        [<ffffffff8112427c>] ? __audit_syscall_entry+0xac/0x110
        [<ffffffff8166ffee>] system_call_fastpath+0x12/0x76
      Signed-off-by: default avatarHaggai Eran <haggaie@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      31b57b87
    • Wengang Wang's avatar
      rds: rds_ib_device.refcount overflow · 4fabb594
      Wengang Wang authored
      Fixes: 3e0249f9
      
       ("RDS/IB: add refcount tracking to struct rds_ib_device")
      
      There lacks a dropping on rds_ib_device.refcount in case rds_ib_alloc_fmr
      failed(mr pool running out). this lead to the refcount overflow.
      
      A complain in line 117(see following) is seen. From vmcore:
      s_ib_rdma_mr_pool_depleted is 2147485544 and rds_ibdev->refcount is -2147475448.
      That is the evidence the mr pool is used up. so rds_ib_alloc_fmr is very likely
      to return ERR_PTR(-EAGAIN).
      
      115 void rds_ib_dev_put(struct rds_ib_device *rds_ibdev)
      116 {
      117         BUG_ON(atomic_read(&rds_ibdev->refcount) <= 0);
      118         if (atomic_dec_and_test(&rds_ibdev->refcount))
      119                 queue_work(rds_wq, &rds_ibdev->free_work);
      120 }
      
      fix is to drop refcount when rds_ib_alloc_fmr failed.
      Signed-off-by: default avatarWengang Wang <wen.gang.wang@oracle.com>
      Reviewed-by: default avatarHaggai Eran <haggaie@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      4fabb594
    • Tatyana Nikolova's avatar
      RDMA/nes: Fix for incorrect recording of the MAC address · 0a691272
      Tatyana Nikolova authored
      
      
      Fix for incorrect recording of the MAC address
      Signed-off-by: default avatarTatyana Nikolova <Tatyana.E.Nikolova@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      0a691272
    • Tatyana Nikolova's avatar
      RDMA/nes: Fix for resolving the neigh · 165d6822
      Tatyana Nikolova authored
      
      
      Neighbor resolution doesn't work without this fix
      Signed-off-by: default avatarTatyana Nikolova <Tatyana.E.Nikolova@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      165d6822
    • Tatyana Nikolova's avatar
      RDMA/core: Fixes for port mapper client registration · a7f2f24c
      Tatyana Nikolova authored
      
      
      Fixes to allow clients to make remove mapping requests, after
      they have provided the user space service with the mapping
      information, they are using when the service is restarted.
      
      1) Adding IWPM_REG_VALID, IWPM_REG_INCOMPL and IWPM_REG_UNDEF
         registration types for the port mapper clients and functions
         to set/check the registration type.
      2) If the port mapper user space service is not available to register
         the client, then its registration stays IWPM_REG_UNDEF and the
         registration isn't checked until the service becomes available
         (no mappings are possible, if the user space service isn't running).
      3) After the service is restarted, the user space port mapper pid is set
         to valid and the client registration is set to IWPM_REG_INCOMPL
         to allow the client to make remove mapping requests.
      Signed-off-by: default avatarTatyana Nikolova <Tatyana.E.Nikolova@intel.com>
      Reviewed-by: default avatarSteve Wise <swise@opengridcomputing.com>
      Tested-by: default avatarSteve Wise <swise@opengridcomputing.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      a7f2f24c