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3c4b1419c3
linux/drivers/infiniband/hw
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Selvin Xavier 3c4b1419c3 RDMA/bnxt_re: Fix system hang when registration with L2 driver fails 
Driver doesn't release rtnl lock if registration with
L2 driver (bnxt_re_register_netdev) fais and this causes
hang while requesting for the next lock.

[  371.635416] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  371.635417] kworker/u48:1   D    0   634      2 0x80000000
[  371.635423] Workqueue: bnxt_re bnxt_re_task [bnxt_re]
[  371.635424] Call Trace:
[  371.635426]  ? __schedule+0x36b/0xbd0
[  371.635429]  schedule+0x39/0x90
[  371.635430]  schedule_preempt_disabled+0x11/0x20
[  371.635431]  __mutex_lock+0x45b/0x9c0
[  371.635433]  ? __mutex_lock+0x16d/0x9c0
[  371.635435]  ? bnxt_re_ib_reg+0x2b/0xb30 [bnxt_re]
[  371.635438]  ? wake_up_klogd+0x37/0x40
[  371.635442]  bnxt_re_ib_reg+0x2b/0xb30 [bnxt_re]
[  371.635447]  bnxt_re_task+0xfd/0x180 [bnxt_re]
[  371.635449]  process_one_work+0x216/0x5b0
[  371.635450]  ? process_one_work+0x189/0x5b0
[  371.635453]  worker_thread+0x4e/0x3d0
[  371.635455]  kthread+0x10e/0x140
[  371.635456]  ? process_one_work+0x5b0/0x5b0
[  371.635458]  ? kthread_stop+0x220/0x220
[  371.635460]  ret_from_fork+0x3a/0x50
[  371.635477] INFO: task NetworkManager:1228 blocked for more than 120 seconds.
[  371.635478]       Tainted: G    B      OE     4.20.0-rc1+ #42
[  371.635479] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

Release the rtnl_lock correctly in the failure path.

Fixes: de5c95d0f5 ("RDMA/bnxt_re: Fix system crash during RDMA resource initialization")
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-11-21 14:11:04 -07:00
..
bnxt_re RDMA/bnxt_re: Fix system hang when registration with L2 driver fails 2018-11-21 14:11:04 -07:00
cxgb3 RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
cxgb4 First merge window pull request 2018-10-26 07:38:19 -07:00
hfi1 Revert "mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks" 2018-10-26 16:25:19 -07:00
hns RDMA/hns: Add FRMR support for hip08 2018-10-16 00:17:08 -06:00
i40iw RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
mlx4 RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
mlx5 RDMA/mlx5: Fix fence type for IB_WR_LOCAL_INV WR 2018-11-21 14:03:00 -07:00
mthca RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
nes First merge window pull request 2018-10-26 07:38:19 -07:00
ocrdma RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
qedr RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
qib First merge window pull request 2018-10-26 07:38:19 -07:00
usnic RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
vmw_pvrdma RDMA/drivers: Use core provided API for registering device attributes 2018-10-17 03:45:01 -06:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00