Commit d359f354 authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Roland Dreier

IB/qib: Fix for broken sparse warning fix

Commit 1fb9fed6 ("IB/qib: Fix QP RCU sparse warning") broke QP
hash list deletion in qp_remove() badly.

This patch restores the former for loop behavior, while still fixing
the sparse warnings.

Cc: <stable@vger.kernel.org>
Reviewed-by: default avatarGary Leshner <gary.s.leshner@intel.com>
Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 949db153
......@@ -263,20 +263,15 @@ static void remove_qp(struct qib_ibdev *dev, struct qib_qp *qp)
struct qib_qp __rcu **qpp;
qpp = &dev->qp_table[n];
q = rcu_dereference_protected(*qpp,
lockdep_is_held(&dev->qpt_lock));
for (; q; qpp = &q->next) {
for (; (q = rcu_dereference_protected(*qpp,
lockdep_is_held(&dev->qpt_lock))) != NULL;
qpp = &q->next)
if (q == qp) {
atomic_dec(&qp->refcount);
*qpp = qp->next;
rcu_assign_pointer(qp->next, NULL);
q = rcu_dereference_protected(*qpp,
lockdep_is_held(&dev->qpt_lock));
break;
}
q = rcu_dereference_protected(*qpp,
lockdep_is_held(&dev->qpt_lock));
}
}
spin_unlock_irqrestore(&dev->qpt_lock, flags);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment