diff options
| author | Alexander Chiang <achiang@hp.com> | 2010-02-02 19:08:35 +0000 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2010-02-24 10:23:44 -0800 |
| commit | d451b8df9f7e572ea77f976745f424dd1dae8aeb (patch) | |
| tree | 92d00c446dbfe63d61d3a052b16227908f9c4ae1 /drivers/infiniband | |
| parent | 6aa2a86ec430fb1ae739bd065d7ea6596997a2cf (diff) | |
| download | lwn-d451b8df9f7e572ea77f976745f424dd1dae8aeb.tar.gz lwn-d451b8df9f7e572ea77f976745f424dd1dae8aeb.zip | |
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.c | 15 |
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; } |