From: Parav Pandit <parav@mellanox.com>
Date: Thu, 12 Dec 2019 13:30:24 +0200
Subject: IB/core: Rename event_handler_lock to qp_open_list_lock
Patch-mainline: v5.6-rc1
Git-commit: 40adf686128856c4add948fb002d43e2c507d1aa
References: jsc#SLE-8449

This lock is used to protect the qp->open_list linked list. As a side
effect it seems to also globally serialize the qp event_handler, but it
isn't clear if that is a deliberate design.

Link: https://lore.kernel.org/r/20191212113024.336702-5-leon@kernel.org
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/device.c |    2 +-
 drivers/infiniband/core/verbs.c  |   12 ++++++------
 include/rdma/ib_verbs.h          |    2 +-
 3 files changed, 8 insertions(+), 8 deletions(-)

--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -587,7 +587,7 @@ struct ib_device *_ib_alloc_device(size_
 	rdma_init_coredev(&device->coredev, device, &init_net);
 
 	INIT_LIST_HEAD(&device->event_handler_list);
-	spin_lock_init(&device->event_handler_lock);
+	spin_lock_init(&device->qp_open_list_lock);
 	init_rwsem(&device->event_handler_rwsem);
 	mutex_init(&device->unregistration_lock);
 	/*
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1056,11 +1056,11 @@ static void __ib_shared_qp_event_handler
 	struct ib_qp *qp = context;
 	unsigned long flags;
 
-	spin_lock_irqsave(&qp->device->event_handler_lock, flags);
+	spin_lock_irqsave(&qp->device->qp_open_list_lock, flags);
 	list_for_each_entry(event->element.qp, &qp->open_list, open_list)
 		if (event->element.qp->event_handler)
 			event->element.qp->event_handler(event, event->element.qp->qp_context);
-	spin_unlock_irqrestore(&qp->device->event_handler_lock, flags);
+	spin_unlock_irqrestore(&qp->device->qp_open_list_lock, flags);
 }
 
 static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp)
@@ -1097,9 +1097,9 @@ static struct ib_qp *__ib_open_qp(struct
 	qp->qp_num = real_qp->qp_num;
 	qp->qp_type = real_qp->qp_type;
 
-	spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
+	spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
 	list_add(&qp->open_list, &real_qp->open_list);
-	spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
+	spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
 
 	return qp;
 }
@@ -1827,9 +1827,9 @@ int ib_close_qp(struct ib_qp *qp)
 	if (real_qp == qp)
 		return -EINVAL;
 
-	spin_lock_irqsave(&real_qp->device->event_handler_lock, flags);
+	spin_lock_irqsave(&real_qp->device->qp_open_list_lock, flags);
 	list_del(&qp->open_list);
-	spin_unlock_irqrestore(&real_qp->device->event_handler_lock, flags);
+	spin_unlock_irqrestore(&real_qp->device->qp_open_list_lock, flags);
 
 	atomic_dec(&real_qp->usecnt);
 	if (qp->qp_sec)
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2633,7 +2633,7 @@ struct ib_device {
 	struct rw_semaphore event_handler_rwsem;
 
 	/* Protects QP's event_handler calls and open_qp list */
-	spinlock_t event_handler_lock;
+	spinlock_t qp_open_list_lock;
 
 	struct rw_semaphore	      client_data_rwsem;
 	struct xarray                 client_data;