diff options
| author |   Mike Marciniszyn <mike.marciniszyn@intel.com> | 2014-09-19 08:32:19 -0400 |
|---|---|---|
| committer |   Roland Dreier <roland@purestorage.com> | 2014-09-19 10:18:32 -0700 |
| commit | 85cbb7c728bf39c45a9789b88c9471c0d7a58b0e (patch) | |
| tree | 943991994effdf8ec4d191e872b5a1d3fbcd755f /drivers/infiniband/hw/qib/qib_qp.c | |
| parent | IB/qib: Change get_user_pages() usage to always NULL vmas (diff) | |
| download | linux-dev-85cbb7c728bf39c45a9789b88c9471c0d7a58b0e.tar.xz linux-dev-85cbb7c728bf39c45a9789b88c9471c0d7a58b0e.zip | |
IB/qib: Correct reference counting in debugfs qp_stats
This particular reference count is not needed with the rcu protection,
and the current code leaks a reference count, causing a hang in
qib_qp_destroy().
Cc: <stable@vger.kernel.org>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib_qp.c')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_qp.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/qib/qib_qp.c b/drivers/infiniband/hw/qib/qib_qp.c index 7fcc150d603c..6ddc0264aad2 100644 --- a/drivers/infiniband/hw/qib/qib_qp.c +++ b/drivers/infiniband/hw/qib/qib_qp.c @@ -1325,7 +1325,6 @@ int qib_qp_iter_next(struct qib_qp_iter *iter) struct qib_qp *pqp = iter->qp; struct qib_qp *qp; - rcu_read_lock(); for (; n < dev->qp_table_size; n++) { if (pqp) qp = rcu_dereference(pqp->next); @@ -1333,18 +1332,11 @@ int qib_qp_iter_next(struct qib_qp_iter *iter) qp = rcu_dereference(dev->qp_table[n]); pqp = qp; if (qp) { - if (iter->qp) - atomic_dec(&iter->qp->refcount); - atomic_inc(&qp->refcount); - rcu_read_unlock(); iter->qp = qp; iter->n = n; return 0; } } - rcu_read_unlock(); - if (iter->qp) - atomic_dec(&iter->qp->refcount); return ret; } |