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RDMA/core: Create "issm*" device nodes only when SMI is supported

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For an IB port create it's issm device node only when it has SMI
capability. In following patches mlx5 is going to support IB devices
without this cap.

Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/359f73c9a388d5e3ae971e40d8507888b1ba6f93.1718553901.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
This commit is contained in:
Mark Zhang 2024-06-16 19:08:33 +03:00 committed by Leon Romanovsky
parent 24943dcdc1
commit 50660c5197
1 changed files with 17 additions and 10 deletions
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27
drivers/infiniband/core/user_mad.c
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@ -1321,15 +1321,17 @@ static int ib_umad_init_port(struct ib_device *device, int port_num,
if (ret)
goto err_cdev;
ib_umad_init_port_dev(&port->sm_dev, port, device);
port->sm_dev.devt = base_issm;
dev_set_name(&port->sm_dev, "issm%d", port->dev_num);
cdev_init(&port->sm_cdev, &umad_sm_fops);
port->sm_cdev.owner = THIS_MODULE;
if (rdma_cap_ib_smi(device, port_num)) {
ib_umad_init_port_dev(&port->sm_dev, port, device);
port->sm_dev.devt = base_issm;
dev_set_name(&port->sm_dev, "issm%d", port->dev_num);
cdev_init(&port->sm_cdev, &umad_sm_fops);
port->sm_cdev.owner = THIS_MODULE;
ret = cdev_device_add(&port->sm_cdev, &port->sm_dev);
if (ret)
goto err_dev;
ret = cdev_device_add(&port->sm_cdev, &port->sm_dev);
if (ret)
goto err_dev;
}
return 0;
@ -1345,9 +1347,13 @@ static int ib_umad_init_port(struct ib_device *device, int port_num,
static void ib_umad_kill_port(struct ib_umad_port *port)
{
struct ib_umad_file *file;
bool has_smi = false;
int id;
cdev_device_del(&port->sm_cdev, &port->sm_dev);
if (rdma_cap_ib_smi(port->ib_dev, port->port_num)) {
cdev_device_del(&port->sm_cdev, &port->sm_dev);
has_smi = true;
}
cdev_device_del(&port->cdev, &port->dev);
mutex_lock(&port->file_mutex);
@ -1373,7 +1379,8 @@ static void ib_umad_kill_port(struct ib_umad_port *port)
ida_free(&umad_ida, port->dev_num);
/* balances device_initialize() */
put_device(&port->sm_dev);
if (has_smi)
put_device(&port->sm_dev);
put_device(&port->dev);
}