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linux-stable/drivers/infiniband/hw/mlx5
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Leon Romanovsky 23eaf3b5c1 RDMA/mlx5: Release locks during notifier unregister 
The below kernel panic was observed when created bond mode LACP
with GRE tunnel on top. The reason to it was not released spinlock
during mlx5 notify unregsiter sequence.

[  234.562007] BUG: scheduling while atomic: sh/10900/0x00000002
[  234.563005] Preemption disabled at:
[  234.566864] ------------[ cut here ]------------
[  234.567120] DEBUG_LOCKS_WARN_ON(val > preempt_count())
[  234.567139] WARNING: CPU: 16 PID: 10900 at kernel/sched/core.c:3203 preempt_count_sub+0xca/0x170
[  234.569550] CPU: 16 PID: 10900 Comm: sh Tainted: G        W 5.2.0-rc1-for-linust-dbg-2019-05-25_04-57-33-60 #1
[  234.569886] Hardware name: Dell Inc. PowerEdge R720/0X3D66, BIOS 2.6.1 02/12/2018
[  234.570183] RIP: 0010:preempt_count_sub+0xca/0x170
[  234.570404] Code: 03 38
d0 7c 08 84 d2 0f 85 b0 00 00 00 8b 15 dd 02 03 04 85 d2 75 ba 48 c7 c6
00 e1 88 83 48 c7 c7 40 e1 88 83 e8 76 11 f7 ff <0f> 0b 5b c3 65 8b 05
d3 1f d8 7e 84 c0 75 82 e8 62 c3 c3 00 85 c0
[  234.570911] RSP: 0018:ffff888b94477b08 EFLAGS: 00010286
[  234.571133] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
[  234.571391] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000246
[  234.571648] RBP: ffff888ba5560000 R08: fffffbfff08962d5 R09: fffffbfff08962d5
[  234.571902] R10: 0000000000000001 R11: fffffbfff08962d4 R12: ffff888bac6e9548
[  234.572157] R13: ffff888babfaf728 R14: ffff888bac6e9568 R15: ffff888babfaf750
[  234.572412] FS: 00007fcafa59b740(0000) GS:ffff888bed200000(0000) knlGS:0000000000000000
[  234.572686] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  234.572914] CR2: 00007f984f16b140 CR3: 0000000b2bf0a001 CR4: 00000000001606e0
[  234.573172] Call Trace:
[  234.573336] _raw_spin_unlock+0x2e/0x50
[  234.573542] mlx5_ib_unbind_slave_port+0x1bc/0x690 [mlx5_ib]
[  234.573793] mlx5_ib_cleanup_multiport_master+0x1d3/0x660 [mlx5_ib]
[  234.574039] mlx5_ib_stage_init_cleanup+0x4c/0x360 [mlx5_ib]
[  234.574271]  ? kfree+0xf5/0x2f0
[  234.574465] __mlx5_ib_remove+0x61/0xd0 [mlx5_ib]
[  234.574688]  ? __mlx5_ib_remove+0xd0/0xd0 [mlx5_ib]
[  234.574951] mlx5_remove_device+0x234/0x300 [mlx5_core]
[  234.575224] mlx5_unregister_device+0x4d/0x1e0 [mlx5_core]
[  234.575493] remove_one+0x4f/0x160 [mlx5_core]
[  234.575704] pci_device_remove+0xef/0x2a0
[  234.581407]  ? pcibios_free_irq+0x10/0x10
[  234.587143]  ? up_read+0xc1/0x260
[  234.592785] device_release_driver_internal+0x1ab/0x430
[  234.598442] unbind_store+0x152/0x200
[  234.604064]  ? sysfs_kf_write+0x3b/0x180
[  234.609441]  ? sysfs_file_ops+0x160/0x160
[  234.615021] kernfs_fop_write+0x277/0x440
[  234.620288]  ? __sb_start_write+0x1ef/0x2c0
[  234.625512] vfs_write+0x15e/0x460
[  234.630786] ksys_write+0x156/0x1e0
[  234.635988]  ? __ia32_sys_read+0xb0/0xb0
[  234.641120]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[  234.646163] do_syscall_64+0x95/0x470
[  234.651106] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  234.656004] RIP: 0033:0x7fcaf9c9cfd0
[  234.660686] Code: 73 01
c3 48 8b 0d c0 6e 2d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00
83 3d cd cf 2d 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73
31 c3 48 83 ec 08 e8 ee cb 01 00 48 89 04 24
[  234.670128] RSP: 002b:00007ffd3b01ddd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[  234.674811] RAX: ffffffffffffffda RBX: 000000000000000d RCX: 00007fcaf9c9cfd0
[  234.679387] RDX: 000000000000000d RSI: 00007fcafa5c1000 RDI: 0000000000000001
[  234.683848] RBP: 00007fcafa5c1000 R08: 000000000000000a R09: 00007fcafa59b740
[  234.688167] R10: 00007ffd3b01d8e0 R11: 0000000000000246 R12: 00007fcaf9f75400
[  234.692386] R13: 000000000000000d R14: 0000000000000001 R15: 0000000000000000
[  234.696495] irq event stamp: 153067
[  234.700525] hardirqs last enabled at (153067): [<ffffffff83258c39>] _raw_spin_unlock_irqrestore+0x59/0x70
[  234.704665] hardirqs last disabled at (153066): [<ffffffff83259382>] _raw_spin_lock_irqsave+0x22/0x90
[  234.708722] softirqs last enabled at (153058): [<ffffffff836006c5>] __do_softirq+0x6c5/0xb4e
[  234.712673] softirqs last disabled at (153051): [<ffffffff81227c1d>] irq_exit+0x17d/0x1d0
[  234.716601] ---[ end trace 5dbf096843ee9ce6 ]---

Fixes: df097a278c ("IB/mlx5: Use the new mlx5 core notifier API")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190731083852.584-1-leon@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>
2019-08-01 12:41:41 -04:00
..
ah.c RDMA: Handle AH allocations by IB/core 2019-04-08 13:05:25 -03:00
cmd.c mlx5: avoid 64-bit division 2019-05-29 13:03:21 -03:00
cmd.h IB/mlx5: Add steering SW ICM device memory type 2019-05-06 12:51:51 -03:00
cong.c infiniband: mlx5: no need to check return value of debugfs_create functions 2019-01-24 09:22:29 -07:00
cq.c Merge mlx5-next into rdma for-next 2019-07-03 16:50:26 -03:00
devx.c Merge branch 'vhca-tunnel' into rdma.git for-next 2019-07-08 13:48:55 -03:00
doorbell.c IB/{core,hw}: Have ib_umem_get extract the ib_ucontext from ib_udata 2019-01-10 17:07:45 -07:00
flow.c net/mlx5: Add flow context for flow tag 2019-06-26 12:01:28 -07:00
gsi.c RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const 2018-07-30 20:09:34 -06:00
ib_rep.c Merge mlx5-next into rdma for-next 2019-07-05 10:16:19 -03:00
ib_rep.h Merge mlx5-next into rdma for-next 2019-07-03 16:50:26 -03:00
ib_virt.c
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mad.c IB/mlx5: Fixed reporting counters on 2nd port for Dual port RoCE 2019-07-03 15:08:54 -03:00
main.c RDMA/mlx5: Release locks during notifier unregister 2019-08-01 12:41:41 -04:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mem.c RDMA/umem: Move page_shift from ib_umem to ib_odp_umem 2019-05-21 15:23:24 -03:00
mlx5_ib.h IB/mlx5: Fix unreg_umr to ignore the mkey state 2019-07-24 16:42:27 -03:00
mr.c IB/mlx5: Fix MR registration flow to use UMR properly 2019-08-01 11:49:51 -04:00
odp.c IB/mlx5: Prevent concurrent MR updates during invalidation 2019-07-25 11:39:38 -03:00
qp.c IB/mlx5: Fix RSS Toeplitz setup to be aligned with the HW specification 2019-07-25 11:45:48 -03:00
srq.c RDMA: Handle SRQ allocations by IB/core 2019-04-08 13:05:25 -03:00
srq.h RDMA: Handle SRQ allocations by IB/core 2019-04-08 13:05:25 -03:00
srq_cmd.c RDMA: Handle SRQ allocations by IB/core 2019-04-08 13:05:25 -03:00