From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
The fact that resource tracking 02d8883f520e ("RDMA/restrack: Add general
infrastructure to track RDMA resources") was added immediately after
commit 16c1975f1032 ("IB/mlx5: Create profile infrastructure to add and
remove stages") caused to miss the fact that PD and CQ are created after
ib_register_device, but released after ib_unregister_device() and not
before as it is expected from normal flow.
Fix introduced in commit 42cea83f9524 ("IB/mlx5: Fix cleanup order on unload")
revealed this fact, so this patch is needed to avoid from restrack warnings
It fixes resource tracking warnings during shutdown.
[ 43.473906] CPU: 5 PID: 3016 Comm: modprobe Not tainted 4.16.0-rc5-for-linust-perf-2018-03-19_07-01-58-14 #1
[ 43.473907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu2 04/01/2014
[ 43.473919] RIP: 0010:rdma_restrack_clean+0x25/0x30 [ib_core]
[ 43.473921] RSP: 0018:ffffc9000267be48 EFLAGS: 00010282
[ 43.473924] RAX: 0000000000000000 RBX: ffff88033c690070 RCX: 0000000180080006
[ 43.473925] RDX: ffff88035ce922e0 RSI: ffffea000cf1a200 RDI: ffff88033c6907c8
[ 43.473926] RBP: ffff88033c690070 R08: ffff88033c689000 R09: 0000000180080006
[ 43.473927] R10: 000000003c68a001 R11: ffff88033c689000 R12: ffff88033c690000
[ 43.473929] R13: ffff88033c69005c R14: 0000000000000000 R15: 0000000000000000
[ 43.473932] FS: 00007f5928359740(0000) GS:ffff88036c540000(0000) knlGS:0000000000000000
[ 43.473933] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 43.473935] CR2: 00007ffffc760cc8 CR3: 000000035620c000 CR4: 00000000000006e0
[ 43.473940] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 43.473941] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 43.473942] Call Trace:
[ 43.473969] ib_unregister_device+0xf5/0x190 [ib_core]
[ 43.474000] __mlx5_ib_remove+0x2e/0x40 [mlx5_ib]
[ 43.474098] mlx5_remove_device+0xf5/0x120 [mlx5_core]
[ 43.474132] mlx5_unregister_interface+0x37/0x90 [mlx5_core]
[ 43.474142] mlx5_ib_cleanup+0xc/0x16a [mlx5_ib]
[ 43.474152] SyS_delete_module+0x159/0x260
[ 43.474159] do_syscall_64+0x61/0x110
[ 43.474165] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 43.474168] RIP: 0033:0x7f59278466b7
[ 43.474170] RSP: 002b:00007ffffc763e38 EFLAGS: 00000202 ORIG_RAX: 00000000000000b0
[ 43.474172] RAX: ffffffffffffffda RBX: 000000000130d590 RCX: 00007f59278466b7
[ 43.474173] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000000000130d5f8
[ 43.474175] RBP: 0000000000000000 R08: 00007f5927b0b060 R09: 00007f59278b6a40
[ 43.474176] R10: 00007ffffc763bc0 R11: 0000000000000202 R12: 0000000000000000
[ 43.474177] R13: 0000000000000001 R14: 000000000130d5f8 R15: 0000000000000000
[ 43.474179] Code: 84 00 00 00 00 00 0f 1f 44 00 00 48 83 c7 28 31 c0
eb 0c 48 83 c0 08 48 3d 00 08 00 00 74 0f 48 8d 14 07 48 8b 12 48 85 d2
74 e8 <0f> 0b c3 f3 c3 66 0f 1f 44 00 00 0f 1f 44 00 00 53 48 8b 47 28
[ 43.474221] ---[ end trace e89771e2250ffc23 ]---
Fixes: 42cea83f9524 ("IB/mlx5: Fix cleanup order on unload")
Reviewed-by: Mark Bloch <markb@xxxxxxxxxxxx>
Signed-off-by: Parav Pandit <parav@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
Changelog v0->v1:
* Reimplemented Parav's suggestion and added his SOB.
---
drivers/infiniband/core/device.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index bb065c9449be..b7459cf524e4 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -290,6 +290,7 @@ void ib_dealloc_device(struct ib_device *device)
{
WARN_ON(device->reg_state != IB_DEV_UNREGISTERED &&
device->reg_state != IB_DEV_UNINITIALIZED);
+ rdma_restrack_clean(&device->res);
put_device(&device->dev);
}
EXPORT_SYMBOL(ib_dealloc_device);
@@ -600,8 +601,6 @@ void ib_unregister_device(struct ib_device *device)
}
up_read(&lists_rwsem);
- rdma_restrack_clean(&device->res);
-
ib_device_unregister_rdmacg(device);
ib_device_unregister_sysfs(device);
--
2.14.3
--
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