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authorAlexander Chiang <achiang@hp.com>2010-02-02 19:08:35 +0000
committerRoland Dreier <rolandd@cisco.com>2010-02-24 10:23:44 -0800
commitd451b8df9f7e572ea77f976745f424dd1dae8aeb (patch)
tree92d00c446dbfe63d61d3a052b16227908f9c4ae1 /drivers/infiniband
parent6aa2a86ec430fb1ae739bd065d7ea6596997a2cf (diff)
IB/umad: Use stack variable 'devnum' in ib_umad_init_port
This change is not useful by itself, but sets us up for a future change that allows us to dynamically allocate device numbers in case we have more than IB_UMAD_MAX_PORTS in the system. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/core/user_mad.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index 46c88795cc75..df403ec49d94 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -974,13 +974,16 @@ static CLASS_ATTR(abi_version, S_IRUGO, show_abi_version, NULL);
static int ib_umad_init_port(struct ib_device *device, int port_num,
struct ib_umad_port *port)
{
+ int devnum;
+
spin_lock(&port_lock);
- port->dev_num = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS);
- if (port->dev_num >= IB_UMAD_MAX_PORTS) {
+ devnum = find_first_zero_bit(dev_map, IB_UMAD_MAX_PORTS);
+ if (devnum >= IB_UMAD_MAX_PORTS) {
spin_unlock(&port_lock);
return -1;
}
- set_bit(port->dev_num, dev_map);
+ port->dev_num = devnum;
+ set_bit(devnum, dev_map);
spin_unlock(&port_lock);
port->ib_dev = device;
@@ -992,7 +995,7 @@ static int ib_umad_init_port(struct ib_device *device, int port_num,
cdev_init(&port->cdev, &umad_fops);
port->cdev.owner = THIS_MODULE;
kobject_set_name(&port->cdev.kobj, "umad%d", port->dev_num);
- if (cdev_add(&port->cdev, base_dev + port->dev_num, 1))
+ if (cdev_add(&port->cdev, base_dev + devnum, 1))
goto err_cdev;
port->dev = device_create(umad_class, device->dma_device,
@@ -1009,7 +1012,7 @@ static int ib_umad_init_port(struct ib_device *device, int port_num,
cdev_init(&port->sm_cdev, &umad_sm_fops);
port->sm_cdev.owner = THIS_MODULE;
kobject_set_name(&port->sm_cdev.kobj, "issm%d", port->dev_num);
- if (cdev_add(&port->sm_cdev, base_dev + port->dev_num + IB_UMAD_MAX_PORTS, 1))
+ if (cdev_add(&port->sm_cdev, base_dev + devnum + IB_UMAD_MAX_PORTS, 1))
goto err_sm_cdev;
port->sm_dev = device_create(umad_class, device->dma_device,
@@ -1036,7 +1039,7 @@ err_dev:
err_cdev:
cdev_del(&port->cdev);
- clear_bit(port->dev_num, dev_map);
+ clear_bit(devnum, dev_map);
return -1;
}