1. 05 May, 2016 8 commits
  2. 29 Apr, 2016 1 commit
  3. 28 Apr, 2016 10 commits
    • Jason Gunthorpe's avatar
      IB/security: Restrict use of the write() interface · e6bd18f5
      Jason Gunthorpe authored
      The drivers/infiniband stack uses write() as a replacement for
      bi-directional ioctl().  This is not safe. There are ways to
      trigger write calls that result in the return structure that
      is normally written to user space being shunted off to user
      specified kernel memory instead.
      
      For the immediate repair, detect and deny suspicious accesses to
      the write API.
      
      For long term, update the user space libraries and the kernel API
      to something that doesn't present the same security vulnerabilities
      (likely a structured ioctl() interface).
      
      The impacted uAPI interfaces are generally only available if
      hardware from drivers/infiniband is installed in the system.
      Reported-by: default avatarJann Horn <jann@thejh.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarJason Gunthorpe <jgunthorpe@obsidianresearch.com>
      [ Expanded check to all known write() entry points ]
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      e6bd18f5
    • Dean Luick's avatar
      IB/hfi1: Use kernel default llseek for ui device · 7723d8c2
      Dean Luick authored
      The ui device llseek had a mistake with SEEK_END and did
      not fully follow seek semantics.  Correct all this by
      using a kernel supplied function for fixed size devices.
      
      Cc: Al Viro <viro@ZenIV.linux.org.uk>
      Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
      Signed-off-by: default avatarDean Luick <dean.luick@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      7723d8c2
    • Mitko Haralanov's avatar
      IB/hfi1: Don't attempt to free resources if initialization failed · 94158442
      Mitko Haralanov authored
      Attempting to free resources which have not been allocated and
      initialized properly led to the following kernel backtrace:
      
          BUG: unable to handle kernel NULL pointer dereference at           (null)
          IP: [<ffffffffa09658fe>] unlock_exp_tids.isra.8+0x2e/0x120 [hfi1]
          PGD 852a43067 PUD 85d4a6067 PMD 0
          Oops: 0000 [#1] SMP
          CPU: 0 PID: 2831 Comm: osu_bw Tainted: G          IO 3.12.18-wfr+ #1
          task: ffff88085b15b540 ti: ffff8808588fe000 task.ti: ffff8808588fe000
          RIP: 0010:[<ffffffffa09658fe>]  [<ffffffffa09658fe>] unlock_exp_tids.isra.8+0x2e/0x120 [hfi1]
          RSP: 0018:ffff8808588ffde0  EFLAGS: 00010282
          RAX: 0000000000000000 RBX: ffff880858a31800 RCX: 0000000000000000
          RDX: ffff88085d971bc0 RSI: ffff880858a318f8 RDI: ffff880858a318c0
          RBP: ffff8808588ffe20 R08: 0000000000000000 R09: 0000000000000000
          R10: ffff88087ffd6f40 R11: 0000000001100348 R12: ffff880852900000
          R13: ffff880858a318c0 R14: 0000000000000000 R15: ffff88085d971be8
          FS:  00007f4674e83740(0000) GS:ffff88087f400000(0000) knlGS:0000000000000000
          CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
          CR2: 0000000000000000 CR3: 000000085c377000 CR4: 00000000001407f0
          Stack:
           ffffffffa0941a71 ffff880858a318f8 ffff88085d971bc0 ffff880858a31800
           ffff880852900000 ffff880858a31800 00000000003ffff7 ffff88085d971bc0
           ffff8808588ffe60 ffffffffa09663fc ffff8808588ffe60 ffff880858a31800
          Call Trace:
           [<ffffffffa0941a71>] ? find_mmu_handler+0x51/0x70 [hfi1]
           [<ffffffffa09663fc>] hfi1_user_exp_rcv_free+0x6c/0x120 [hfi1]
           [<ffffffffa0932809>] hfi1_file_close+0x1a9/0x340 [hfi1]
           [<ffffffff8116c189>] __fput+0xe9/0x270
           [<ffffffff8116c35e>] ____fput+0xe/0x10
           [<ffffffff81065707>] task_work_run+0xa7/0xe0
           [<ffffffff81002969>] do_notify_resume+0x59/0x80
           [<ffffffff814ffc1a>] int_signal+0x12/0x17
      
      This commit re-arranges the context initialization code in a way that
      would allow for context event flags to be used to determine whether
      the context has been successfully initialized.
      
      In turn, this can be used to skip the resource de-allocation if they
      were never allocated in the first place.
      
      Fixes: 3abb33ac ("staging/hfi1: Add TID cache receive init and free funcs")
      Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
      Signed-off-by: default avatarMitko Haralanov <mitko.haralanov@intel.com>
      Reviewed-by: Leon Romanovsky <leonro@mellanox.com.
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      94158442
    • Mike Marciniszyn's avatar
      IB/hfi1: Fix missing lock/unlock in verbs drain callback · b9b06cb6
      Mike Marciniszyn authored
      The iowait_sdma_drained() callback lacked locking to
      protect the qp s_flags field.
      
      This causes the s_flags to be out of sync
      on multiple CPUs, potentially corrupting the s_flags.
      
      Fixes: a545f530 ("staging/rdma/hfi: fix CQ completion order issue")
      Reviewed-by: default avatarSebastian Sanchez <sebastian.sanchez@intel.com>
      Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
      Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      b9b06cb6
    • Jubin John's avatar
      IB/rdmavt: Fix send scheduling · e6d2e017
      Jubin John authored
      call_send is used to determine whether to send immediately or schedule
      a send for later. The current logic in rdmavt is inverted and has a
      negative impact on the latency of the hfi1 and qib drivers. Fix this
      regression by correctly calling send immediately when call_send is set.
      Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
      Reviewed-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
      Signed-off-by: default avatarJubin John <jubin.john@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      e6d2e017
    • Mitko Haralanov's avatar
      IB/hfi1: Prevent unpinning of wrong pages · 849e3e93
      Mitko Haralanov authored
      The routine used by the SDMA cache to handle already
      cached nodes can extend an already existing node.
      
      In its error handling code, the routine will unpin pages
      when not all pages of the buffer extension were pinned.
      
      There was a bug in that part of the routine, which would
      mistakenly unpin pages from the original set rather than
      the newly pinned pages.
      
      This commit fixes that bug by offsetting the page array
      to the proper place pointing at the beginning of the newly
      pinned pages.
      Reviewed-by: default avatarDean Luick <dean.luick@intel.com>
      Signed-off-by: default avatarMitko Haralanov <mitko.haralanov@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      849e3e93
    • Mitko Haralanov's avatar
      IB/hfi1: Fix deadlock caused by locking with wrong scope · de82bdff
      Mitko Haralanov authored
      The locking around the interval RB tree is designed to prevent
      access to the tree while it's being modified. The locking in its
      current form is too overzealous, which is causing a deadlock in
      certain cases with the following backtrace:
      
          Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 0
          CPU: 0 PID: 5836 Comm: IMB-MPI1 Tainted: G           O 3.12.18-wfr+ #1
           0000000000000000 ffff88087f206c50 ffffffff814f1caa ffffffff817b53f0
           ffff88087f206cc8 ffffffff814ecd56 0000000000000010 ffff88087f206cd8
           ffff88087f206c78 0000000000000000 0000000000000000 0000000000001662
          Call Trace:
           <NMI>  [<ffffffff814f1caa>] dump_stack+0x45/0x56
           [<ffffffff814ecd56>] panic+0xc2/0x1cb
           [<ffffffff810d4370>] ? restart_watchdog_hrtimer+0x50/0x50
           [<ffffffff810d4432>] watchdog_overflow_callback+0xc2/0xd0
           [<ffffffff81109b4e>] __perf_event_overflow+0x8e/0x2b0
           [<ffffffff8110a714>] perf_event_overflow+0x14/0x20
           [<ffffffff8101c906>] intel_pmu_handle_irq+0x1b6/0x390
           [<ffffffff814f927b>] perf_event_nmi_handler+0x2b/0x50
           [<ffffffff814f8ad8>] nmi_handle.isra.3+0x88/0x180
           [<ffffffff814f8d39>] do_nmi+0x169/0x310
           [<ffffffff814f8177>] end_repeat_nmi+0x1e/0x2e
           [<ffffffff81272600>] ? unmap_single+0x30/0x30
           [<ffffffff814f780d>] ? _raw_spin_lock_irqsave+0x2d/0x40
           [<ffffffff814f780d>] ? _raw_spin_lock_irqsave+0x2d/0x40
           [<ffffffff814f780d>] ? _raw_spin_lock_irqsave+0x2d/0x40
           <<EOE>>  <IRQ>  [<ffffffffa056c4a8>] hfi1_mmu_rb_search+0x38/0x70 [hfi1]
           [<ffffffffa05919cb>] user_sdma_free_request+0xcb/0x120 [hfi1]
           [<ffffffffa0593393>] user_sdma_txreq_cb+0x263/0x350 [hfi1]
           [<ffffffffa057fad7>] ? sdma_txclean+0x27/0x1c0 [hfi1]
           [<ffffffffa0593130>] ? user_sdma_send_pkts+0x1710/0x1710 [hfi1]
           [<ffffffffa057fdd6>] sdma_make_progress+0x166/0x480 [hfi1]
           [<ffffffff810762c9>] ? ttwu_do_wakeup+0x19/0xd0
           [<ffffffffa0581c7e>] sdma_engine_interrupt+0x8e/0x100 [hfi1]
           [<ffffffffa0546bdd>] sdma_interrupt+0x5d/0xa0 [hfi1]
           [<ffffffff81097e57>] handle_irq_event_percpu+0x47/0x1d0
           [<ffffffff81098017>] handle_irq_event+0x37/0x60
           [<ffffffff8109aa5f>] handle_edge_irq+0x6f/0x120
           [<ffffffff810044af>] handle_irq+0xbf/0x150
           [<ffffffff8104c9b7>] ? irq_enter+0x17/0x80
           [<ffffffff8150168d>] do_IRQ+0x4d/0xc0
           [<ffffffff814f7c6a>] common_interrupt+0x6a/0x6a
           <EOI>  [<ffffffff81073524>] ? finish_task_switch+0x54/0xe0
           [<ffffffff814f56c6>] __schedule+0x3b6/0x7e0
           [<ffffffff810763a6>] __cond_resched+0x26/0x30
           [<ffffffff814f5eda>] _cond_resched+0x3a/0x50
           [<ffffffff814f4f82>] down_write+0x12/0x30
           [<ffffffffa0591619>] hfi1_release_user_pages+0x69/0x90 [hfi1]
           [<ffffffffa059173a>] sdma_rb_remove+0x9a/0xc0 [hfi1]
           [<ffffffffa056c00d>] __mmu_rb_remove.isra.5+0x5d/0x70 [hfi1]
           [<ffffffffa056c536>] hfi1_mmu_rb_remove+0x56/0x70 [hfi1]
           [<ffffffffa059427b>] hfi1_user_sdma_process_request+0x74b/0x1160 [hfi1]
           [<ffffffffa055c763>] hfi1_aio_write+0xc3/0x100 [hfi1]
           [<ffffffff8116a14c>] do_sync_readv_writev+0x4c/0x80
           [<ffffffff8116b58b>] do_readv_writev+0xbb/0x230
           [<ffffffff811a9da1>] ? fsnotify+0x241/0x320
           [<ffffffff81073524>] ? finish_task_switch+0x54/0xe0
           [<ffffffff8116b795>] vfs_writev+0x35/0x60
           [<ffffffff8116b8c9>] SyS_writev+0x49/0xc0
           [<ffffffff810cd876>] ? __audit_syscall_exit+0x1f6/0x2a0
           [<ffffffff814ff992>] system_call_fastpath+0x16/0x1b
      
      As evident from the backtrace above, the process was being put to sleep
      while holding the lock.
      
      Limiting the scope of the lock only to the RB tree operation fixes the
      above error allowing for proper locking and the process being put to
      sleep when needed.
      Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
      Reviewed-by: default avatarDean Luick <dean.luick@intel.com>
      Signed-off-by: default avatarMitko Haralanov <mitko.haralanov@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      de82bdff
    • Mitko Haralanov's avatar
      IB/hfi1: Prevent NULL pointer deferences in caching code · f19bd643
      Mitko Haralanov authored
      There is a potential kernel crash when the MMU notifier calls the
      invalidation routines in the hfi1 pinned page caching code for sdma.
      
      The invalidation routine could call the remove callback
      for the node, which in turn ends up dereferencing the
      current task_struct to get a pointer to the mm_struct.
      However, the mm_struct pointer could be NULL resulting in
      the following backtrace:
      
          BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8
          IP: [<ffffffffa041f75a>] sdma_rb_remove+0xaa/0x100 [hfi1]
          15
          task: ffff88085e66e080 ti: ffff88085c244000 task.ti: ffff88085c244000
          RIP: 0010:[<ffffffffa041f75a>]  [<ffffffffa041f75a>] sdma_rb_remove+0xaa/0x100 [hfi1]
          RSP: 0000:ffff88085c245878  EFLAGS: 00010002
          RAX: 0000000000000000 RBX: ffff88105b9bbd40 RCX: ffffea003931a830
          RDX: 0000000000000004 RSI: ffff88105754a9c0 RDI: ffff88105754a9c0
          RBP: ffff88085c245890 R08: ffff88105b9bbd70 R09: 00000000fffffffb
          R10: ffff88105b9bbd58 R11: 0000000000000013 R12: ffff88105754a9c0
          R13: 0000000000000001 R14: 0000000000000001 R15: ffff88105b9bbd40
          FS:  0000000000000000(0000) GS:ffff88107ef40000(0000) knlGS:0000000000000000
          CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
          CR2: 00000000000000a8 CR3: 0000000001a0b000 CR4: 00000000001407e0
          Stack:
           ffff88105b9bbd40 ffff88080ec481a8 ffff88080ec481b8 ffff88085c2458c0
           ffffffffa03fa00e ffff88080ec48190 ffff88080ed9cd00 0000000001024000
           0000000000000000 ffff88085c245920 ffffffffa03fa0e7 0000000000000282
          Call Trace:
           [<ffffffffa03fa00e>] __mmu_rb_remove.isra.5+0x5e/0x70 [hfi1]
           [<ffffffffa03fa0e7>] mmu_notifier_mem_invalidate+0xc7/0xf0 [hfi1]
           [<ffffffffa03fa143>] mmu_notifier_page+0x13/0x20 [hfi1]
           [<ffffffff81156dd0>] __mmu_notifier_invalidate_page+0x50/0x70
           [<ffffffff81140bbb>] try_to_unmap_one+0x20b/0x470
           [<ffffffff81141ee7>] try_to_unmap_anon+0xa7/0x120
           [<ffffffff81141fad>] try_to_unmap+0x4d/0x60
           [<ffffffff8111fd7b>] shrink_page_list+0x2eb/0x9d0
           [<ffffffff81120ab3>] shrink_inactive_list+0x243/0x490
           [<ffffffff81121491>] shrink_lruvec+0x4c1/0x640
           [<ffffffff81121641>] shrink_zone+0x31/0x100
           [<ffffffff81121b0f>] kswapd_shrink_zone.constprop.62+0xef/0x1c0
           [<ffffffff811229e3>] kswapd+0x403/0x7e0
           [<ffffffff811225e0>] ? shrink_all_memory+0xf0/0xf0
           [<ffffffff81068ac0>] kthread+0xc0/0xd0
           [<ffffffff81068a00>] ? insert_kthread_work+0x40/0x40
           [<ffffffff814ff8ec>] ret_from_fork+0x7c/0xb0
           [<ffffffff81068a00>] ? insert_kthread_work+0x40/0x40
      
      To correct this, the mm_struct passed to us by the MMU notifier is
      used (which is what should have been done to begin with). This avoids
      the broken derefences and ensures that the correct mm_struct is used.
      Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
      Reviewed-by: default avatarDean Luick <dean.luick@intel.com>
      Signed-off-by: default avatarMitko Haralanov <mitko.haralanov@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      f19bd643
    • Sagi Grimberg's avatar
    • Sagi Grimberg's avatar
      IB/mlx5: Expose correct max_sge_rd limit · 986ef95e
      Sagi Grimberg authored
      mlx5 devices (Connect-IB, ConnectX-4, ConnectX-4-LX) has a limitation
      where rdma read work queue entries cannot exceed 512 bytes.
      A rdma_read wqe needs to fit in 512 bytes:
      - wqe control segment (16 bytes)
      - rdma segment (16 bytes)
      - scatter elements (16 bytes each)
      
      So max_sge_rd should be: (512 - 16 - 16) / 16 = 30.
      
      Cc: linux-stable@vger.kernel.org
      Reported-by: default avatarChristoph Hellwig <hch@lst.de>
      Tested-by: default avatarChristoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarSagi Grimberg <sagig@grimberg.me>
      Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      986ef95e
  4. 26 Apr, 2016 5 commits
    • Hariprasad S's avatar
      RDMA/iw_cxgb4: Fix bar2 virt addr calculation for T4 chips · 32cc92c7
      Hariprasad S authored
      For T4, kernel mode qps don't use the user doorbell. User mode qps during
      flow control db ringing are forced into kernel, where user doorbell is
      treated as kernel doorbell and proper bar2 offset in bar2 virtual space is
      calculated, which incase of T4 is a bogus address, causing a kernel panic
      due to illegal write during doorbell ringing.
      In case of T4, kernel mode qp bar2 virtual address should be 0. Added T4
      check during bar2 virtual address calculation to return 0. Fixed Bar2
      range checks based on bar2 physical address.
      
      The below oops will be fixed
      
        <1>BUG: unable to handle kernel paging request at 000000000002aa08
        <1>IP: [<ffffffffa011d800>] c4iw_uld_control+0x4e0/0x880 [iw_cxgb4]
        <4>PGD 1416a8067 PUD 15bf35067 PMD 0
        <4>Oops: 0002 [#1] SMP
        <4>last sysfs file:
        /sys/devices/pci0000:00/0000:00:03.0/0000:02:00.4/infiniband/cxgb4_0/node_guid
        <4>CPU 5
        <4>Modules linked in: rdma_ucm rdma_cm ib_cm ib_sa ib_mad ib_uverbs
        ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE
        iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack
        ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables bridge autofs4
        target_core_iblock target_core_file target_core_pscsi target_core_mod
        configfs bnx2fc cnic uio fcoe libfcoe libfc scsi_transport_fc scsi_tgt 8021q
        garp stp llc cpufreq_ondemand acpi_cpufreq freq_table mperf vhost_net macvtap
        macvlan tun kvm uinput microcode iTCO_wdt iTCO_vendor_support sg joydev
        serio_raw i2c_i801 i2c_core lpc_ich mfd_core e1000e ptp pps_core ioatdma dca
        i7core_edac edac_core shpchp ext3 jbd mbcache sd_mod crc_t10dif pata_acpi
        ata_generic ata_piix iw_cxgb4 iw_cm ib_core ib_addr cxgb4 ipv6 dm_mirror
        dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
        <4>
        Supermicro X8ST3/X8ST3
        <4>RIP: 0010:[<ffffffffa011d800>]  [<ffffffffa011d800>]
        c4iw_uld_control+0x4e0/0x880 [iw_cxgb4]
        <4>RSP: 0000:ffff880155a03db0  EFLAGS: 00010006
        <4>RAX: 000000000000001d RBX: ffff88013ae5fc00 RCX: ffff880155adb180
        <4>RDX: 000000000002aa00 RSI: 0000000000000001 RDI: ffff88013ae5fdf8
        <4>RBP: ffff880155a03e10 R08: 0000000000000000 R09: 0000000000000001
        <4>R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
        <4>R13: 000000000000001d R14: ffff880156414ab0 R15: ffffe8ffffc05b88
        <4>FS:  0000000000000000(0000) GS:ffff8800282a0000(0000) knlGS:0000000000000000
        <4>CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
        <4>CR2: 000000000002aa08 CR3: 000000015bd0e000 CR4: 00000000000007e0
        <4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
        <4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
        <4>Process cxgb4 (pid: 394, threadinfo ffff880155a00000, task ffff880156414ab0)
        <4>Stack:
        <4> ffff880156415068 ffff880155adb180 ffff880155a03df0 ffffffffa00a344b
        <4><d> 00000000000003e8 ffff880155920000 0000000000000004 ffff880155920000
        <4><d> ffff88015592d438 ffffffffa00a3860 ffff880155a03fd8 ffffe8ffffc05b88
        <4>Call Trace:
        <4> [<ffffffffa00a344b>] ? enable_txq_db+0x2b/0x80 [cxgb4]
        <4> [<ffffffffa00a3860>] ? process_db_full+0x0/0xa0 [cxgb4]
        <4> [<ffffffffa00a38a6>] process_db_full+0x46/0xa0 [cxgb4]
        <4> [<ffffffff8109fda0>] worker_thread+0x170/0x2a0
        <4> [<ffffffff810a6aa0>] ? autoremove_wake_function+0x0/0x40
        <4> [<ffffffff8109fc30>] ? worker_thread+0x0/0x2a0
        <4> [<ffffffff810a660e>] kthread+0x9e/0xc0
        <4> [<ffffffff8100c28a>] child_rip+0xa/0x20
        <4> [<ffffffff810a6570>] ? kthread+0x0/0xc0
        <4> [<ffffffff8100c280>] ? child_rip+0x0/0x20
        <4>Code: e9 ba 00 00 00 66 0f 1f 44 00 00 44 8b 05 29 07 02 00 45 85 c0 0f 85
        71 02 00 00 8b 83 70 01 00 00 45 0f b7 ed c1 e0 0f 44 09 e8 <89> 42 08 0f ae f8
        66 c7 83 82 01 00 00 00 00 44 0f b7 ab dc 01
        <1>RIP  [<ffffffffa011d800>] c4iw_uld_control+0x4e0/0x880 [iw_cxgb4]
        <4> RSP <ffff880155a03db0>
        <4>CR2: 000000000002aa08`
      
      Based on original work by Bharat Potnuri <bharat@chelsio.com>
      
      Fixes: 74217d4c ("iw_cxgb4: support for bar2 qid densities exceeding the page size")
      Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
      Signed-off-by: default avatarHariprasad Shenai <hariprasad@chelsio.com>
      Reviewed-by: default avatarLeon Romanovsky <leon@leon.nu>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      32cc92c7
    • Steve Wise's avatar
      iw_cxgb4: handle draining an idle qp · 40edd7fd
      Steve Wise authored
      In c4iw_drain_sq/rq(), if the particular queue is already empty
      then don't block.
      
      Fixes: ce4af14d94aa ('iw_cxgb4: add queue drain functions')
      Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      40edd7fd
    • Steve Wise's avatar
      iw_cxgb3: initialize ibdev.iwcm->ifname for port mapping · ad202348
      Steve Wise authored
      The IWCM uses ibdev.iwcm->ifname for registration with the iwarp
      port map daemon.  But iw_cxgb3 did not initialize this field which
      causes intermittent registration failures based on the contents of the
      uninitialized memory.
      
      Fixes: c1340e8a ("iw_cxgb3: support for iWARP port mapping")
      Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      ad202348
    • Steve Wise's avatar
      iw_cxgb4: initialize ibdev.iwcm->ifname for port mapping · 851d7b6b
      Steve Wise authored
      The IWCM uses ibdev.iwcm->ifname for registration with the iwarp
      port map daemon.  But iw_cxgb4 did not initialize this field which
      causes intermittent registration failures based on the contents of the
      uninitialized memory.
      
      Fixes: 170003c8 ("iw_cxgb4: remove port mapper related code")
      Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      851d7b6b
    • Sagi Grimberg's avatar
      IB/core: Don't drain non-existent rq queue-pair · 42235f80
      Sagi Grimberg authored
      The drain_rq function expects a normal receive qp to drain.  A qp can
      only have either a normal rq or an srq.  If there is an srq, there
      is no rq to drain.  Until the API supports draining SRQs, simply
      skip draining the rq when the qp has an srq attached.
      
      Fixes: 765d6774 ("IB: new common API for draining queues")
      Signed-off-by: default avatarSagi Grimberg <sagi@grimberg.me>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      42235f80
  5. 23 Apr, 2016 1 commit
  6. 06 Apr, 2016 2 commits
    • Arnd Bergmann's avatar
      i40iw: avoid potential uninitialized variable use · 2fe78571
      Arnd Bergmann authored
      gcc finds that the i40iw_make_cm_node() function in the recently added
      i40iw driver uses an uninitilized variable as an index into an array
      if CONFIG_IPV6 is disabled and the driver uses IPv6 mode:
      
      drivers/infiniband/hw/i40iw/i40iw_cm.c: In function 'i40iw_make_cm_node':
      drivers/infiniband/hw/i40iw/i40iw_cm.c:2206:52: error: 'arpindex' may be used uninitialized in this function [-Werror=maybe-uninitialized]
        ether_addr_copy(cm_node->rem_mac, iwdev->arp_table[arpindex].mac_addr);
      
      As far as I can tell, this code path can not be used because the ipv4
      variable is always set with CONFIG_IPV6 is disabled, but it's better
      to be sure and prevent the undefined behavior, as well as shut up
      that warning in a proper way.
      
      This adds an 'else' clause for the case we get the warning about,
      causing the function to return an error in a controlled way.
      To avoid adding extra mess with combined io()/#ifdef clauses,
      I'm also converting the existing #ifdef into a more readable
      if(IS_ENABLED()) check.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Fixes: f27b4746 ("i40iw: add connection management code")
      Acked-by: default avatarMustafa Ismail <Mustafa.ismail@intel.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      2fe78571
    • Arnd Bergmann's avatar
      IB/mlx5: fix VFs callback function prototypes · 9967c70a
      Arnd Bergmann authored
      The previous patch that added a couple of callback functions put
      the declarations inside of an #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING,
      which causes the build to fail if that option is disabled:
      
      drivers/infiniband/hw/mlx5/main.c: In function 'mlx5_ib_add':
      drivers/infiniband/hw/mlx5/main.c:2358:31: error: 'mlx5_ib_get_vf_config' undeclared (first use in this function)
      
      This moves the four declarations below the #ifdef section so they
      are always available.
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Fixes: eff901d3 ("IB/mlx5: Implement callbacks for manipulating VFs")
      Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
      Reviewed-by: default avatarEli Cohen <eli@mellanox.com>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      9967c70a
  7. 03 Apr, 2016 5 commits
    • Linus Torvalds's avatar
      Linux 4.6-rc2 · 9735a227
      Linus Torvalds authored
      9735a227
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4c3b73c6
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Misc kernel side fixes:
      
         - fix event leak
         - fix AMD PMU driver bug
         - fix core event handling bug
         - fix build bug on certain randconfigs
      
        Plus misc tooling fixes"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/amd/ibs: Fix pmu::stop() nesting
        perf/core: Don't leak event in the syscall error path
        perf/core: Fix time tracking bug with multiplexing
        perf jit: genelf makes assumptions about endian
        perf hists: Fix determination of a callchain node's childlessness
        perf tools: Add missing initialization of perf_sample.cpumode in synthesized samples
        perf tools: Fix build break on powerpc
        perf/x86: Move events_sysfs_show() outside CPU_SUP_INTEL
        perf bench: Fix detached tarball building due to missing 'perf bench memcpy' headers
        perf tests: Fix tarpkg build test error output redirection
      4c3b73c6
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7b367f5d
      Linus Torvalds authored
      Pull core kernel fixes from Ingo Molnar:
       "This contains the nohz/atomic cleanup/fix for the fetch_or() ugliness
        you noted during the original nohz pull request, plus there's also
        misc fixes:
      
         - fix liblockdep build bug
         - fix uapi header build bug
         - print more lockdep hash collision info to help debug recent reports
           of hash collisions
         - update MAINTAINERS email address"
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        MAINTAINERS: Update my email address
        locking/lockdep: Print chain_key collision information
        uapi/linux/stddef.h: Provide __always_inline to userspace headers
        tools/lib/lockdep: Fix unsupported 'basename -s' in run_tests.sh
        locking/atomic, sched: Unexport fetch_or()
        timers/nohz: Convert tick dependency mask to atomic_t
        locking/atomic: Introduce atomic_fetch_or()
      7b367f5d
    • Linus Torvalds's avatar
      v4l2-mc: avoid warning about unused variable · 17084b7e
      Linus Torvalds authored
      Commit 840f5b05 ("media: au0828 disable tuner to demod link in
      au0828_media_device_register()") removed all uses of the 'dtv_demod',
      but left the variable itself around.
      
      Remove it.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      17084b7e
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 30cebb6c
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "This lot contains:
      
         - Some fixups for the fallout of the topology consolidation which
           unearthed AMD/Intel inconsistencies
         - Documentation for the x86 topology management
         - Support for AMD advanced power management bits
         - Two simple cleanups removing duplicated code"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/cpu: Add advanced power management bits
        x86/thread_info: Merge two !__ASSEMBLY__ sections
        x86/cpufreq: Remove duplicated TDP MSR macro definitions
        x86/Documentation: Start documenting x86 topology
        x86/cpu: Get rid of compute_unit_id
        perf/x86/amd: Cleanup Fam10h NB event constraints
        x86/topology: Fix AMD core count
      30cebb6c
  8. 02 Apr, 2016 8 commits
    • Linus Torvalds's avatar
      Merge tag 'rproc-v4.6-rc1' of git://github.com/andersson/remoteproc · f7eeb8a8
      Linus Torvalds authored
      Pull remoteproc fix from Bjorn Andersson:
       "Fix incorrect error check in the ST remoteproc driver and advertise
        the newly created linux-remoteproc mailing list"
      
      * tag 'rproc-v4.6-rc1' of git://github.com/andersson/remoteproc:
        MAINTAINERS: Add mailing list for remote processor subsystems
        remoteproc: st: fix check of syscon_regmap_lookup_by_phandle() return value
      f7eeb8a8
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · d6c24df0
      Linus Torvalds authored
      Pull SCSI target fixes from Nicholas Bellinger:
       "This includes fixes from HCH for -rc1 configfs default_groups
        conversion changes that ended up breaking some iscsi-target
        default_groups, along with Sagi's ib_drain_qp() conversion for
        iser-target to use the common caller now available to RDMA kernel
        consumers in v4.6+ code"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        target: add a new add_wwn_groups fabrics method
        target: initialize the nacl base CIT begfore init_nodeacl
        target: remove ->fabric_cleanup_nodeacl
        iser-target: Use ib_drain_qp
      d6c24df0
    • Linus Torvalds's avatar
      Convert straggling drivers to new six-argument get_user_pages() · cb107161
      Linus Torvalds authored
      Commit d4edcf0d ("mm/gup: Switch all callers of get_user_pages() to
      not pass tsk/mm") switched get_user_pages() callers to the simpler model
      where they no longer pass in the thread and mm pointer.  But since then
      we've merged changes to a few drivers that re-introduce use of the old
      interface.  Let's fix them up.
      
      They continued to work fine (thanks to the truly disgusting macros
      introduced in commit cde70140: "mm/gup: Overload get_user_pages()
      functions"), but cause unnecessary build noise.
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      cb107161
    • Linus Torvalds's avatar
      Merge tag 'configfs-for-linus-2' of git://git.infradead.org/users/hch/configfs · 264800b5
      Linus Torvalds authored
      Pull configfs fix from Christoph Hellwig:
       "A trivial fix to the recently introduced binary attribute helper
        macros"
      
      * tag 'configfs-for-linus-2' of git://git.infradead.org/users/hch/configfs:
        configfs: fix CONFIGFS_BIN_ATTR_[RW]O definitions
      264800b5
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 05cf8077
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Missing device reference in IPSEC input path results in crashes
          during device unregistration.  From Subash Abhinov Kasiviswanathan.
      
       2) Per-queue ISR register writes not being done properly in macb
          driver, from Cyrille Pitchen.
      
       3) Stats accounting bugs in bcmgenet, from Patri Gynther.
      
       4) Lightweight tunnel's TTL and TOS were swapped in netlink dumps, from
          Quentin Armitage.
      
       5) SXGBE driver has off-by-one in probe error paths, from Rasmus
          Villemoes.
      
       6) Fix race in save/swap/delete options in netfilter ipset, from
          Vishwanath Pai.
      
       7) Ageing time of bridge not set properly when not operating over a
          switchdev device.  Fix from Haishuang Yan.
      
       8) Fix GRO regression wrt nested FOU/GUE based tunnels, from Alexander
          Duyck.
      
       9) IPV6 UDP code bumps wrong stats, from Eric Dumazet.
      
      10) FEC driver should only access registers that actually exist on the
          given chipset, fix from Fabio Estevam.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (73 commits)
        net: mvneta: fix changing MTU when using per-cpu processing
        stmmac: fix MDIO settings
        Revert "stmmac: Fix 'eth0: No PHY found' regression"
        stmmac: fix TX normal DESC
        net: mvneta: use cache_line_size() to get cacheline size
        net: mvpp2: use cache_line_size() to get cacheline size
        net: mvpp2: fix maybe-uninitialized warning
        tun, bpf: fix suspicious RCU usage in tun_{attach, detach}_filter
        net: usb: cdc_ncm: adding Telit LE910 V2 mobile broadband card
        rtnl: fix msg size calculation in if_nlmsg_size()
        fec: Do not access unexisting register in Coldfire
        net: mvneta: replace MVNETA_CPU_D_CACHE_LINE_SIZE with L1_CACHE_BYTES
        net: mvpp2: replace MVPP2_CPU_D_CACHE_LINE_SIZE with L1_CACHE_BYTES
        net: dsa: mv88e6xxx: Clear the PDOWN bit on setup
        net: dsa: mv88e6xxx: Introduce _mv88e6xxx_phy_page_{read, write}
        bpf: make padding in bpf_tunnel_key explicit
        ipv6: udp: fix UDP_MIB_IGNOREDMULTI updates
        bnxt_en: Fix ethtool -a reporting.
        bnxt_en: Fix typo in bnxt_hwrm_set_pause_common().
        bnxt_en: Implement proper firmware message padding.
        ...
      05cf8077
    • Linus Torvalds's avatar
      Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux · cf78031a
      Linus Torvalds authored
      Pull clk fixes from Stephen Boyd:
       "A handful of const updates for reset ops and a couple fixes to the
        newly introduced IPQ4019 clock driver"
      
      * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
        clk: qcom: ipq4019: add some fixed clocks for ddrppl and fepll
        clk: qcom: ipq4019: switch remaining defines to enums
        clk: qcom: Make reset_control_ops const
        clk: tegra: Make reset_control_ops const
        clk: sunxi: Make reset_control_ops const
        clk: atlas7: Make reset_control_ops const
        clk: rockchip: Make reset_control_ops const
        clk: mmp: Make reset_control_ops const
        clk: mediatek: Make reset_control_ops const
      cf78031a
    • Linus Torvalds's avatar
      Merge tag 'pm+acpi-4.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm · 1826907c
      Linus Torvalds authored
      Pull power management and ACPI fix from Rafael J. Wysocki:
       "Just one fix for a nasty boot failure on some systems based on Intel
        Skylake that shipped with broken firmware where enabling
        hardware-coordinated P-states management (HWP) causes a faulty
        interrupt handler in SMM to be invoked and crash the system (Srinivas
        Pandruvada)"
      
      * tag 'pm+acpi-4.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
        ACPI / processor: Request native thermal interrupt handling via _OSC
      1826907c
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · 4e19fd93
      Linus Torvalds authored
      Merge fixes from Andrew Morton:
       "11 fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>:
        .mailmap: add Christophe Ricard
        Make CONFIG_FHANDLE default y
        mm/page_isolation.c: fix the function comments
        oom, oom_reaper: do not enqueue task if it is on the oom_reaper_list head
        mm/page_isolation: fix tracepoint to mirror check function behavior
        mm/rmap: batched invalidations should use existing api
        x86/mm: TLB_REMOTE_SEND_IPI should count pages
        mm: fix invalid node in alloc_migrate_target()
        include/linux/huge_mm.h: return NULL instead of false for pmd_trans_huge_lock()
        mm, kasan: fix compilation for CONFIG_SLAB
        MAINTAINERS: orangefs mailing list is subscribers-only
      4e19fd93