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| author | Feras Daoud <ferasda@mellanox.com> | 2016-12-28 12:47:22 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-08 08:26:05 (GMT) |
| commit | e384bbd585ee1b39c9b4da9141bc7c7215d9c224 (patch) | |
| tree | 0b4e8f07eedcaec11c2a46d7fbeac82c3135e4d4 /usr | |
| parent | 6c25cbaff1e9d68e808818526cfabe14aa1d6a50 (diff) | |
| download | linux-e384bbd585ee1b39c9b4da9141bc7c7215d9c224.tar.xz | |
IB/ipoib: Fix deadlock over vlan_mutex
[ Upstream commit 1c3098cdb05207e740715857df7b0998e372f527 ]
This patch fixes Deadlock while executing ipoib_vlan_delete.
The function takes the vlan_rwsem semaphore and calls
unregister_netdevice. The later function calls
ipoib_mcast_stop_thread that cause workqueue flush.
When the queue has one of the ipoib_ib_dev_flush_xxx events,
a deadlock occur because these events also tries to catch the
same vlan_rwsem semaphore.
To fix, unregister_netdevice should be called after releasing
the semaphore.
Fixes: cbbe1efa4972 ("IPoIB: Fix deadlock between ipoib_open() and child interface create")
Signed-off-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions