WSL2-Linux-Kernel/drivers/infiniband/ulp
Shlomo Pongratz b5120a6e11 IPoIB: Fix AB-BA deadlock when deleting neighbours
Lockdep points out a circular locking dependency betwwen the ipoib
device priv spinlock (priv->lock) and the neighbour table rwlock
(ntbl->rwlock).

In the normal path, ie neigbour garbage collection task, the neigh
table rwlock is taken first and then if the neighbour needs to be
deleted, priv->lock is taken.

However in some error paths, such as in ipoib_cm_handle_tx_wc(),
priv->lock is taken first and then ipoib_neigh_free routine is called
which in turn takes the neighbour table ntbl->rwlock.

The solution is to get rid the neigh table rwlock completely and use
only priv->lock.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2012-09-12 09:21:45 -07:00
..
ipoib IPoIB: Fix AB-BA deadlock when deleting neighbours 2012-09-12 09:21:45 -07:00
iser IB/iser: Fix error flow in iser ep connection establishment 2012-05-18 17:05:31 -07:00
srp IB/srp: Fix a race condition 2012-08-15 12:00:48 -07:00
srpt IB: Fix typos in infiniband drivers 2012-08-15 11:56:19 -07:00