diff options
Diffstat (limited to 'drivers/infiniband/core/sysfs.c')
| -rw-r--r-- | drivers/infiniband/core/sysfs.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c index 211ba3223f6..7ce7a6c782f 100644 --- a/drivers/infiniband/core/sysfs.c +++ b/drivers/infiniband/core/sysfs.c @@ -65,6 +65,11 @@ struct port_table_attribute { int index; }; +static inline int ibdev_is_alive(const struct ib_device *dev) +{ + return dev->reg_state == IB_DEV_REGISTERED; +} + static ssize_t port_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) { @@ -74,6 +79,8 @@ static ssize_t port_attr_show(struct kobject *kobj, if (!port_attr->show) return -EIO; + if (!ibdev_is_alive(p->ibdev)) + return -ENODEV; return port_attr->show(p, port_attr, buf); } @@ -581,6 +588,9 @@ static ssize_t show_node_type(struct class_device *cdev, char *buf) { struct ib_device *dev = container_of(cdev, struct ib_device, class_dev); + if (!ibdev_is_alive(dev)) + return -ENODEV; + switch (dev->node_type) { case IB_NODE_CA: return sprintf(buf, "%d: CA\n", dev->node_type); case IB_NODE_SWITCH: return sprintf(buf, "%d: switch\n", dev->node_type); @@ -595,6 +605,9 @@ static ssize_t show_sys_image_guid(struct class_device *cdev, char *buf) struct ib_device_attr attr; ssize_t ret; + if (!ibdev_is_alive(dev)) + return -ENODEV; + ret = ib_query_device(dev, &attr); if (ret) return ret; @@ -612,6 +625,9 @@ static ssize_t show_node_guid(struct class_device *cdev, char *buf) struct ib_device_attr attr; ssize_t ret; + if (!ibdev_is_alive(dev)) + return -ENODEV; + ret = ib_query_device(dev, &attr); if (ret) return ret; |