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path: root/drivers/ieee1394/nodemgr.c
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Diffstat (limited to 'drivers/ieee1394/nodemgr.c')
-rw-r--r--drivers/ieee1394/nodemgr.c32
1 files changed, 26 insertions, 6 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index 874d4d47a19c..629a9d88a0da 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -1738,7 +1738,19 @@ exit:
return 0;
}
-int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
+/**
+ * nodemgr_for_each_host - call a function for each IEEE 1394 host
+ * @data: an address to supply to the callback
+ * @cb: function to call for each host
+ *
+ * Iterate the hosts, calling a given function with supplied data for each host.
+ * If the callback fails on a host, i.e. if it returns a non-zero value, the
+ * iteration is stopped.
+ *
+ * Return value: 0 on success, non-zero on failure (same as returned by last run
+ * of the callback).
+ */
+int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
{
struct class_device *cdev;
struct hpsb_host *host;
@@ -1748,7 +1760,7 @@ int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
list_for_each_entry(cdev, &hpsb_host_class.children, node) {
host = container_of(cdev, struct hpsb_host, class_dev);
- if ((error = cb(host, __data)))
+ if ((error = cb(host, data)))
break;
}
up(&hpsb_host_class.sem);
@@ -1771,12 +1783,20 @@ int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
* ID's.
*/
-void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
+/**
+ * hpsb_node_fill_packet - fill some destination information into a packet
+ * @ne: destination node
+ * @packet: packet to fill in
+ *
+ * This will fill in the given, pre-initialised hpsb_packet with the current
+ * information from the node entry (host, node ID, bus generation number).
+ */
+void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
{
- pkt->host = ne->host;
- pkt->generation = ne->generation;
+ packet->host = ne->host;
+ packet->generation = ne->generation;
barrier();
- pkt->node_id = ne->nodeid;
+ packet->node_id = ne->nodeid;
}
int hpsb_node_write(struct node_entry *ne, u64 addr,