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RDMA/cma: Optimize cma_bind_loopback() to check for empty list 

Optimize to test for an empty list first.  This ends up simplifying
the code too.

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Acked-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Krishna Kumar 2006-10-16 10:09:01 +05:30 committed by Roland Dreier
parent 0215ffb08c
commit e82153b54d
1 changed files with 9 additions and 10 deletions
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9
drivers/infiniband/core/cma.c
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@ -1481,19 +1481,18 @@ static int cma_bind_loopback(struct rdma_id_private *id_priv)
u8 p;
mutex_lock(&lock);
if (list_empty(&dev_list)) {
ret = -ENODEV;
goto out;
}
list_for_each_entry(cma_dev, &dev_list, list)
for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
if (!ib_query_port(cma_dev->device, p, &port_attr) &&
port_attr.state == IB_PORT_ACTIVE)
goto port_found;
if (!list_empty(&dev_list)) {
p = 1;
cma_dev = list_entry(dev_list.next, struct cma_device, list);
} else {
ret = -ENODEV;
goto out;
}
port_found:
ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);