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RDMA/cma: Optimize error handling 

Reorganize code relating to cma_get_net_info() and rdam_create_id() to
optimize error case handling (no need to alloc memory/etc. as part of
rdma_create_id() if input parameters are wrong).

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Krishna Kumar 2006-09-29 12:09:51 -07:00 committed by Roland Dreier
parent 94de178ac6
commit 3f168d2b66
1 changed files with 16 additions and 12 deletions
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28
drivers/infiniband/core/cma.c
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@ -874,23 +874,25 @@ static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id,
__u16 port;
u8 ip_ver;
id = rdma_create_id(listen_id->event_handler, listen_id->context,
listen_id->ps);
if (IS_ERR(id))
return NULL;
rt = &id->route;
rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths, GFP_KERNEL);
if (!rt->path_rec)
goto err;
if (cma_get_net_info(ib_event->private_data, listen_id->ps,
&ip_ver, &port, &src, &dst))
goto err;
id = rdma_create_id(listen_id->event_handler, listen_id->context,
listen_id->ps);
if (IS_ERR(id))
goto err;
cma_save_net_info(&id->route.addr, &listen_id->route.addr,
ip_ver, port, src, dst);
rt = &id->route;
rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
GFP_KERNEL);
if (!rt->path_rec)
goto destroy_id;
rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
if (rt->num_paths == 2)
rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
@ -903,8 +905,10 @@ static struct rdma_id_private *cma_new_id(struct rdma_cm_id *listen_id,
id_priv = container_of(id, struct rdma_id_private, id);
id_priv->state = CMA_CONNECT;
return id_priv;
err:
destroy_id:
rdma_destroy_id(id);
err:
return NULL;
}