IB: Add node_guid to struct ib_device
Add a node_guid field to struct ib_device. It is the responsibility
of the low-level driver to initialize this field before registering a
device with the midlayer. Convert everyone to looking at this field
instead of calling ib_query_device() when all they want is the node
GUID, and remove the node_guid field from struct ib_device_attr.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 1f1743c..5982d68 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -445,13 +445,7 @@
return -ENOMEM;
/*
- * It might be nice to pass the node GUID with the event, but
- * right now the only way to get it is to query the device
- * provider, and this can crash during device removal because
- * we are will be running after driver removal has started.
- * We could add a node_guid field to struct ib_device, or we
- * could just let userspace read the node GUID from sysfs when
- * devices are added.
+ * It would be nice to pass the node GUID with the event...
*/
envp[i] = NULL;
@@ -623,21 +617,15 @@
static ssize_t show_node_guid(struct class_device *cdev, char *buf)
{
struct ib_device *dev = container_of(cdev, struct ib_device, class_dev);
- 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;
-
return sprintf(buf, "%04x:%04x:%04x:%04x\n",
- be16_to_cpu(((__be16 *) &attr.node_guid)[0]),
- be16_to_cpu(((__be16 *) &attr.node_guid)[1]),
- be16_to_cpu(((__be16 *) &attr.node_guid)[2]),
- be16_to_cpu(((__be16 *) &attr.node_guid)[3]));
+ be16_to_cpu(((__be16 *) &dev->node_guid)[0]),
+ be16_to_cpu(((__be16 *) &dev->node_guid)[1]),
+ be16_to_cpu(((__be16 *) &dev->node_guid)[2]),
+ be16_to_cpu(((__be16 *) &dev->node_guid)[3]));
}
static CLASS_DEVICE_ATTR(node_type, S_IRUGO, show_node_type, NULL);