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| author | Erez Shitrit <erezsh@mellanox.com> | 2014-07-08 12:45:12 +0300 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2014-08-05 07:47:33 -0700 |
| commit | 4eae374845affc3ebf8ccfc38d554a86adc95003 (patch) | |
| tree | 7d60bd89c5f42d98b6657a177c7b7d6956c71982 /drivers/infiniband/ulp/ipoib/ipoib_main.c | |
| parent | db84f88037592f069f5c1fc7f6b00ae6f5eb2e84 (diff) | |
| download | op-kernel-dev-4eae374845affc3ebf8ccfc38d554a86adc95003.zip op-kernel-dev-4eae374845affc3ebf8ccfc38d554a86adc95003.tar.gz | |
IB/ipoib: Avoid flushing the workqueue from worker context
The error flow of ipoib_ib_dev_open() invokes ipoib_ib_dev_stop() with
workqueue flushing enabled, which deadlocks if the open procedure
itself was called by a worker thread.
Fix this by adding a flush enabled flag to ipoib_ib_dev_open() and set
it accordingly from the locations where such a call is made.
The call trace was the following:
[<ffffffff81095bc4>] ? flush_workqueue+0x54/0x80
[<ffffffffa056c657>] ? ipoib_ib_dev_stop+0x447/0x650 [ib_ipoib]
[<ffffffffa056cc34>] ? ipoib_ib_dev_open+0x284/0x430 [ib_ipoib]
[<ffffffffa05674a8>] ? ipoib_open+0x78/0x1d0 [ib_ipoib]
[<ffffffffa05697b8>] ? ipoib_pkey_open+0x38/0x40 [ib_ipoib]
[<ffffffffa056cf3c>] ? __ipoib_ib_dev_flush+0x15c/0x2c0 [ib_ipoib]
[<ffffffffa056ce56>] ? __ipoib_ib_dev_flush+0x76/0x2c0 [ib_ipoib]
[<ffffffffa056d0a0>] ? ipoib_ib_dev_flush_heavy+0x0/0x20 [ib_ipoib]
[<ffffffffa056d0ba>] ? ipoib_ib_dev_flush_heavy+0x1a/0x20 [ib_ipoib]
[<ffffffff81094d20>] ? worker_thread+0x170/0x2a0
[<ffffffff8109b2a0>] ? autoremove_wake_function+0x0/0x40
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Acked-by: Alex Estrin <alex.estrin@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_main.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index 35acbd4..1bf994a 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -114,7 +114,7 @@ int ipoib_open(struct net_device *dev) if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) return 0; - if (ipoib_ib_dev_open(dev)) + if (ipoib_ib_dev_open(dev, 1)) goto err_disable; if (ipoib_ib_dev_up(dev)) |
