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RDMA/(core, ulp): Convert register/unregister event handler to be void

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The functions ib_register_event_handler() and
ib_unregister_event_handler() always returned success and they can't fail.

Let's convert those functions to be void, remove redundant checks and
cleanup tons of goto statements.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Leon Romanovsky 2017-08-17 15:50:36 +03:00 committed by Doug Ledford
parent 55f2467cd7
commit dcc9881e67
9 changed files with 20 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/infiniband/core/cache.c
View File

@ -1199,30 +1199,23 @@ int ib_cache_setup_one(struct ib_device *device)
device->cache.ports =
kzalloc(sizeof(*device->cache.ports) *
(rdma_end_port(device) - rdma_start_port(device) + 1), GFP_KERNEL);
if (!device->cache.ports) {
err = -ENOMEM;
goto out;
}
if (!device->cache.ports)
return -ENOMEM;
err = gid_table_setup_one(device);
if (err)
goto out;
if (err) {
kfree(device->cache.ports);
device->cache.ports = NULL;
return err;
}
for (p = 0; p <= rdma_end_port(device) - rdma_start_port(device); ++p)
ib_cache_update(device, p + rdma_start_port(device), true);
INIT_IB_EVENT_HANDLER(&device->cache.event_handler,
device, ib_cache_event);
err = ib_register_event_handler(&device->cache.event_handler);
if (err)
goto err;
ib_register_event_handler(&device->cache.event_handler);
return 0;
err:
gid_table_cleanup_one(device);
out:
return err;
}
void ib_cache_release_one(struct ib_device *device)

8
drivers/infiniband/core/device.c
View File

@ -747,7 +747,7 @@ EXPORT_SYMBOL(ib_set_client_data);
* chapter 11 of the InfiniBand Architecture Specification). This
* callback may occur in interrupt context.
*/
int ib_register_event_handler (struct ib_event_handler *event_handler)
void ib_register_event_handler(struct ib_event_handler *event_handler)
{
unsigned long flags;
@ -755,8 +755,6 @@ int ib_register_event_handler (struct ib_event_handler *event_handler)
list_add_tail(&event_handler->list,
&event_handler->device->event_handler_list);
spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
return 0;
}
EXPORT_SYMBOL(ib_register_event_handler);
@ -767,15 +765,13 @@ EXPORT_SYMBOL(ib_register_event_handler);
* Unregister an event handler registered with
* ib_register_event_handler().
*/
int ib_unregister_event_handler(struct ib_event_handler *event_handler)
void ib_unregister_event_handler(struct ib_event_handler *event_handler)
{
unsigned long flags;
spin_lock_irqsave(&event_handler->device->event_handler_lock, flags);
list_del(&event_handler->list);
spin_unlock_irqrestore(&event_handler->device->event_handler_lock, flags);
return 0;
}
EXPORT_SYMBOL(ib_unregister_event_handler);

3
drivers/infiniband/core/sa_query.c
View File

@ -2417,8 +2417,7 @@ static void ib_sa_add_one(struct ib_device *device)
*/
INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
if (ib_register_event_handler(&sa_dev->event_handler))
goto err;
ib_register_event_handler(&sa_dev->event_handler);
for (i = 0; i <= e - s; ++i) {
if (rdma_cap_ib_sa(device, i + 1))

13
drivers/infiniband/core/uverbs_main.c
View File

@ -595,7 +595,6 @@ struct file *ib_uverbs_alloc_async_event_file(struct ib_uverbs_file *uverbs_file
{
struct ib_uverbs_async_event_file *ev_file;
struct file *filp;
int ret;
ev_file = kzalloc(sizeof(*ev_file), GFP_KERNEL);
if (!ev_file)
@ -621,21 +620,11 @@ struct file *ib_uverbs_alloc_async_event_file(struct ib_uverbs_file *uverbs_file
INIT_IB_EVENT_HANDLER(&uverbs_file->event_handler,
ib_dev,
ib_uverbs_event_handler);
ret = ib_register_event_handler(&uverbs_file->event_handler);
if (ret)
goto err_put_file;
ib_register_event_handler(&uverbs_file->event_handler);
/* At that point async file stuff was fully set */
return filp;
err_put_file:
fput(filp);
kref_put(&uverbs_file->async_file->ref,
ib_uverbs_release_async_event_file);
uverbs_file->async_file = NULL;
return ERR_PTR(ret);
err_put_refs:
kref_put(&ev_file->uverbs_file->ref, ib_uverbs_release_file);
kref_put(&ev_file->ref, ib_uverbs_release_async_event_file);

10
drivers/infiniband/ulp/ipoib/ipoib_main.c
View File

@ -2227,13 +2227,7 @@ static struct net_device *ipoib_add_port(const char *format,
INIT_IB_EVENT_HANDLER(&priv->event_handler,
priv->ca, ipoib_event);
result = ib_register_event_handler(&priv->event_handler);
if (result < 0) {
printk(KERN_WARNING "%s: ib_register_event_handler failed for "
"port %d (ret = %d)\n",
hca->name, port, result);
goto event_failed;
}
ib_register_event_handler(&priv->event_handler);
result = register_netdev(priv->dev);
if (result) {
@ -2266,8 +2260,6 @@ register_failed:
set_bit(IPOIB_STOP_NEIGH_GC, &priv->flags);
cancel_delayed_work(&priv->neigh_reap_task);
flush_workqueue(priv->wq);
event_failed:
ipoib_dev_cleanup(priv->dev);
device_init_failed:

6
drivers/infiniband/ulp/iser/iser_verbs.c
View File

@ -106,9 +106,7 @@ static int iser_create_device_ib_res(struct iser_device *device)
INIT_IB_EVENT_HANDLER(&device->event_handler, ib_dev,
iser_event_handler);
if (ib_register_event_handler(&device->event_handler))
goto cq_err;
ib_register_event_handler(&device->event_handler);
return 0;
cq_err:
@ -141,7 +139,7 @@ static void iser_free_device_ib_res(struct iser_device *device)
comp->cq = NULL;
}
(void)ib_unregister_event_handler(&device->event_handler);
ib_unregister_event_handler(&device->event_handler);
ib_dealloc_pd(device->pd);
kfree(device->comps);

7
drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c
View File

@ -954,12 +954,7 @@ static int vema_register(struct opa_vnic_ctrl_port *cport)
INIT_IB_EVENT_HANDLER(&port->event_handler,
cport->ibdev, opa_vnic_event);
ret = ib_register_event_handler(&port->event_handler);
if (ret) {
c_err("port %d: event handler register failed\n", i);
vema_unregister(cport);
return ret;
}
ib_register_event_handler(&port->event_handler);
idr_init(&port->vport_idr);
mutex_init(&port->lock);

5
drivers/infiniband/ulp/srpt/ib_srpt.c
View File

@ -2238,7 +2238,7 @@ static int srpt_write_pending(struct se_cmd *se_cmd)
cqe, first_wr);
cqe = NULL;
}
ret = ib_post_send(ch->qp, first_wr, &bad_wr);
if (ret) {
pr_err("%s: ib_post_send() returned %d for %d (avail: %d)\n",
@ -2530,8 +2530,7 @@ static void srpt_add_one(struct ib_device *device)
INIT_IB_EVENT_HANDLER(&sdev->event_handler, sdev->device,
srpt_event_handler);
if (ib_register_event_handler(&sdev->event_handler))
goto err_cm;
ib_register_event_handler(&sdev->event_handler);
sdev->ioctx_ring = (struct srpt_recv_ioctx **)
srpt_alloc_ioctx_ring(sdev, sdev->srq_size,

4
include/rdma/ib_verbs.h
View File

@ -2413,8 +2413,8 @@ int ib_modify_qp_is_ok(enum ib_qp_state cur_state, enum ib_qp_state next_state,
enum ib_qp_type type, enum ib_qp_attr_mask mask,
enum rdma_link_layer ll);
int ib_register_event_handler (struct ib_event_handler *event_handler);
int ib_unregister_event_handler(struct ib_event_handler *event_handler);
void ib_register_event_handler(struct ib_event_handler *event_handler);
void ib_unregister_event_handler(struct ib_event_handler *event_handler);
void ib_dispatch_event(struct ib_event *event);
int ib_query_port(struct ib_device *device,