Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

Pull rdma updates from Doug Ledford:
 "This is the complete update for the rdma stack for this release cycle.

  Most of it is typical driver and core updates, but there is the
  entirely new VMWare pvrdma driver. You may have noticed that there
  were changes in DaveM's pull request to the bnxt Ethernet driver to
  support a RoCE RDMA driver. The bnxt_re driver was tentatively set to
  be pulled in this release cycle, but it simply wasn't ready in time
  and was dropped (a few review comments still to address, and some
  multi-arch build issues like prefetch() not working across all
  arches).

  Summary:

   - shared mlx5 updates with net stack (will drop out on merge if
     Dave's tree has already been merged)

   - driver updates: cxgb4, hfi1, hns-roce, i40iw, mlx4, mlx5, qedr, rxe

   - debug cleanups

   - new connection rejection helpers

   - SRP updates

   - various misc fixes

   - new paravirt driver from vmware"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma: (210 commits)
  IB: Add vmw_pvrdma driver
  IB/mlx4: fix improper return value
  IB/ocrdma: fix bad initialization
  infiniband: nes: return value of skb_linearize should be handled
  MAINTAINERS: Update Intel RDMA RNIC driver maintainers
  MAINTAINERS: Remove Mitesh Ahuja from emulex maintainers
  IB/core: fix unmap_sg argument
  qede: fix general protection fault may occur on probe
  IB/mthca: Replace pci_pool_alloc by pci_pool_zalloc
  mlx5, calc_sq_size(): Make a debug message more informative
  mlx5: Remove a set-but-not-used variable
  mlx5: Use { } instead of { 0 } to init struct
  IB/srp: Make writing the add_target sysfs attr interruptible
  IB/srp: Make mapping failures easier to debug
  IB/srp: Make login failures easier to debug
  IB/srp: Introduce a local variable in srp_add_one()
  IB/srp: Fix CONFIG_DYNAMIC_DEBUG=n build
  IB/multicast: Check ib_find_pkey() return value
  IPoIB: Avoid reading an uninitialized member variable
  IB/mad: Fix an array index check
  ...

1 files changed, 27 insertions, 37 deletions

diff --git a/drivers/infiniband/sw/rdmavt/cq.c b/drivers/infiniband/sw/rdmavt/cq.c
index 6d9904a4a0ab..4d0b6992e847 100644
--- a/drivers/infiniband/sw/rdmavt/cq.c
+++ b/drivers/infiniband/sw/rdmavt/cq.c
@@ -119,18 +119,17 @@ void rvt_cq_enter(struct rvt_cq *cq, struct ib_wc *entry, bool solicited)
 	if (cq->notify == IB_CQ_NEXT_COMP ||
 	    (cq->notify == IB_CQ_SOLICITED &&
 	     (solicited || entry->status != IB_WC_SUCCESS))) {
-		struct kthread_worker *worker;
 		/*
 		 * This will cause send_complete() to be called in
 		 * another thread.
 		 */
-		smp_read_barrier_depends(); /* see rvt_cq_exit */
-		worker = cq->rdi->worker;
-		if (likely(worker)) {
+		spin_lock(&cq->rdi->n_cqs_lock);
+		if (likely(cq->rdi->worker)) {
 			cq->notify = RVT_CQ_NONE;
 			cq->triggered++;
-			kthread_queue_work(worker, &cq->comptask);
+			kthread_queue_work(cq->rdi->worker, &cq->comptask);
 		}
+		spin_unlock(&cq->rdi->n_cqs_lock);
 	}
 
 	spin_unlock_irqrestore(&cq->lock, flags);
@@ -240,15 +239,15 @@ struct ib_cq *rvt_create_cq(struct ib_device *ibdev,
 		}
 	}
 
-	spin_lock(&rdi->n_cqs_lock);
+	spin_lock_irq(&rdi->n_cqs_lock);
 	if (rdi->n_cqs_allocated == rdi->dparms.props.max_cq) {
-		spin_unlock(&rdi->n_cqs_lock);
+		spin_unlock_irq(&rdi->n_cqs_lock);
 		ret = ERR_PTR(-ENOMEM);
 		goto bail_ip;
 	}
 
 	rdi->n_cqs_allocated++;
-	spin_unlock(&rdi->n_cqs_lock);
+	spin_unlock_irq(&rdi->n_cqs_lock);
 
 	if (cq->ip) {
 		spin_lock_irq(&rdi->pending_lock);
@@ -296,9 +295,9 @@ int rvt_destroy_cq(struct ib_cq *ibcq)
 	struct rvt_dev_info *rdi = cq->rdi;
 
 	kthread_flush_work(&cq->comptask);
-	spin_lock(&rdi->n_cqs_lock);
+	spin_lock_irq(&rdi->n_cqs_lock);
 	rdi->n_cqs_allocated--;
-	spin_unlock(&rdi->n_cqs_lock);
+	spin_unlock_irq(&rdi->n_cqs_lock);
 	if (cq->ip)
 		kref_put(&cq->ip->ref, rvt_release_mmap_info);
 	else
@@ -504,33 +503,23 @@ int rvt_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
  */
 int rvt_driver_cq_init(struct rvt_dev_info *rdi)
 {
-	int ret = 0;
 	int cpu;
-	struct task_struct *task;
+	struct kthread_worker *worker;
 
 	if (rdi->worker)
 		return 0;
+
 	spin_lock_init(&rdi->n_cqs_lock);
-	rdi->worker = kzalloc(sizeof(*rdi->worker), GFP_KERNEL);
-	if (!rdi->worker)
-		return -ENOMEM;
-	kthread_init_worker(rdi->worker);
-	task = kthread_create_on_node(
-		kthread_worker_fn,
-		rdi->worker,
-		rdi->dparms.node,
-		"%s", rdi->dparms.cq_name);
-	if (IS_ERR(task)) {
-		kfree(rdi->worker);
-		rdi->worker = NULL;
-		return PTR_ERR(task);
-	}
 
-	set_user_nice(task, MIN_NICE);
 	cpu = cpumask_first(cpumask_of_node(rdi->dparms.node));
-	kthread_bind(task, cpu);
-	wake_up_process(task);
-	return ret;
+	worker = kthread_create_worker_on_cpu(cpu, 0,
+					      "%s", rdi->dparms.cq_name);
+	if (IS_ERR(worker))
+		return PTR_ERR(worker);
+
+	set_user_nice(worker->task, MIN_NICE);
+	rdi->worker = worker;
+	return 0;
 }
 
 /**
@@ -541,13 +530,14 @@ void rvt_cq_exit(struct rvt_dev_info *rdi)
 {
 	struct kthread_worker *worker;
 
-	worker = rdi->worker;
-	if (!worker)
+	/* block future queuing from send_complete() */
+	spin_lock_irq(&rdi->n_cqs_lock);
+	if (!rdi->worker) {
+		spin_unlock_irq(&rdi->n_cqs_lock);
 		return;
-	/* blocks future queuing from send_complete() */
+	}
 	rdi->worker = NULL;
-	smp_wmb(); /* See rdi_cq_enter */
-	kthread_flush_worker(worker);
-	kthread_stop(worker->task);
-	kfree(worker);
+	spin_unlock_irq(&rdi->n_cqs_lock);
+
+	kthread_destroy_worker(worker);
 }