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IB/core: Rename event_handler_lock to qp_open_list_lock 

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>
This commit is contained in:
Parav Pandit 2019-12-12 13:30:24 +02:00 committed by Jason Gunthorpe
parent 17e1064632
commit 40adf68612
3 changed files with 8 additions and 8 deletions
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2
drivers/infiniband/core/device.c
View File

@ -587,7 +587,7 @@ struct ib_device *_ib_alloc_device(size_t 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);
/*

12
drivers/infiniband/core/verbs.c
View File

@ -1056,11 +1056,11 @@ static void __ib_shared_qp_event_handler(struct ib_event *event, void *context)
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 ib_qp *real_qp,
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)

2
include/rdma/ib_verbs.h
View File

@ -2631,7 +2631,7 @@ 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;