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| author |   Harish Chegondi <harish.chegondi@intel.com> | 2016-02-14 12:11:28 -0800 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2016-03-10 20:38:11 -0500 |
| commit | 21cfca33587d45ccdc5aaaedf97a909ccc4a0a27 (patch) | |
| tree | 914ef578ecfb7ce95db17d0c535d9dcd74581882 /drivers/infiniband/hw/qib/qib_mad.c | |
| parent | IB/rdmavt: Remove unnecessary exported functions (diff) | |
| download | linux-dev-21cfca33587d45ccdc5aaaedf97a909ccc4a0a27.tar.xz linux-dev-21cfca33587d45ccdc5aaaedf97a909ccc4a0a27.zip | |
IB/qib: Destroy SMI AH before de-allocating the protection domain
If SMI AH is not destroyed before de-allocating the PD, it would result in
non-zero PD use count when de-allocating the PD, triggering a WARN_ON() at
drivers/infiniband/core/verbs.c:284 ib_dealloc_pd+0x69/0xb0 [ib_core]()
when unloading the qib driver on systems with dual-port card.
This problem has always been there in qib and was detected only after the
commit 7dd78647a2c2 ("IB/core: Make ib_dealloc_pd return void") introduced
a WARN_ON in ib_dealloc_pd() that triggers if a PD's use count is non-zero
before de-allocating the PD.
Below is the call trace from the dmesg log.
[ 7264.966129] Call Trace:
[ 7264.969652] [<ffffffff81338470>] dump_stack+0x44/0x64
[ 7264.976181] [<ffffffff81086bb6>] warn_slowpath_common+0x86/0xc0
[ 7264.983656] [<ffffffff81086cfa>] warn_slowpath_null+0x1a/0x20
[ 7264.990961] [<ffffffffa025c2d9>] ib_dealloc_pd+0x69/0xb0 [ib_core]
[ 7264.998717] [<ffffffffa0044de8>] ib_mad_port_close+0xb8/0x120 [ib_mad]
[ 7265.006866] [<ffffffffa0044ebf>] ib_mad_remove_device+0x6f/0xc0 [ib_mad]
[ 7265.015224] [<ffffffffa025fc87>] ib_unregister_device+0xa7/0x140 [ib_core]
[ 7265.023738] [<ffffffffa04b5b79>] rvt_unregister_device+0x29/0x80 [rdmavt]
[ 7265.032181] [<ffffffffa088d2a2>] qib_unregister_ib_device+0x22/0x210 [ib_qib]
[ 7265.040993] [<ffffffffa085f73f>] qib_remove_one+0x1f/0x250 [ib_qib]
[ 7265.048823] [<ffffffff8137a319>] pci_device_remove+0x39/0xc0
[ 7265.055984] [<ffffffff81466a1a>] __device_release_driver+0x9a/0x140
[ 7265.063821] [<ffffffff81466bc8>] driver_detach+0xb8/0xc0
[ 7265.070579] [<ffffffff81465a15>] bus_remove_driver+0x55/0xd0
[ 7265.077717] [<ffffffff8146732c>] driver_unregister+0x2c/0x50
[ 7265.084849] [<ffffffff813789ba>] pci_unregister_driver+0x2a/0x80
[ 7265.092366] [<ffffffffa08921bd>] qib_ib_cleanup+0x37/0x65 [ib_qib]
[ 7265.100068] [<ffffffff811096d0>] SyS_delete_module+0x190/0x220
[ 7265.107379] [<ffffffff816a7bae>] entry_SYSCALL_64_fastpath+0x12/0x71
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_mad.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_mad.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/qib/qib_mad.c b/drivers/infiniband/hw/qib/qib_mad.c index 73ca2c2a79a7..0bd18375d7df 100644 --- a/drivers/infiniband/hw/qib/qib_mad.c +++ b/drivers/infiniband/hw/qib/qib_mad.c @@ -2496,4 +2496,7 @@ void qib_notify_free_mad_agent(struct rvt_dev_info *rdi, int port_idx) if (dd->pport[port_idx].cong_stats.timer.data) del_timer_sync(&dd->pport[port_idx].cong_stats.timer); + + if (dd->pport[port_idx].ibport_data.smi_ah) + ib_destroy_ah(&dd->pport[port_idx].ibport_data.smi_ah->ibah); } |