On 12/12/2012 03:22 PM, Robert Love wrote:
+ssize_t fcoe_ctlr_create_store(struct bus_type *bus,
+ const char *buf, size_t count)
+{
+ struct net_device *netdev = NULL;
+ struct fcoe_transport *ft = NULL;
+ struct fcoe_ctlr_device *ctlr_dev = NULL;
+ int rc = 0;
+ int err;
+
+ mutex_lock(&ft_mutex);
+
+ netdev = fcoe_if_to_netdev(buf);
+ if (!netdev) {
+ LIBFCOE_TRANSPORT_DBG("Invalid device %s.\n", buf);
+ rc = -ENODEV;
+ goto out_nodev;
+ }
+
+ ft = fcoe_netdev_map_lookup(netdev);
+ if (ft) {
+ LIBFCOE_TRANSPORT_DBG("transport %s already has existing "
+ "FCoE instance on %s.\n",
+ ft->name, netdev->name);
+ rc = -EEXIST;
+ goto out_putdev;
+ }
+
+ ft = fcoe_transport_lookup(netdev);
+ if (!ft) {
+ LIBFCOE_TRANSPORT_DBG("no FCoE transport found for %s.\n",
+ netdev->name);
+ rc = -ENODEV;
+ goto out_putdev;
+ }
+
+ /* pass to transport create */
+ err = ft->alloc ? ft->alloc(netdev) : -ENODEV;
+ if (err) {
+ fcoe_del_netdev_mapping(netdev);
+ rc = -ENOMEM;
+ goto out_putdev;
+ }
+
+ err = fcoe_add_netdev_mapping(netdev, ft);
+ if (err) {
+ LIBFCOE_TRANSPORT_DBG("failed to add new netdev mapping "
+ "for FCoE transport %s for %s.\n",
+ ft->name, netdev->name);
+ rc = -ENODEV;
+ goto out_putdev;
+ }
+
+ LIBFCOE_TRANSPORT_DBG("transport %s %s to create fcoe on %s.\n",
+ ft->name, (ctlr_dev) ? "succeeded" : "failed",
+ netdev->name);
ctlr_dev is initialized to NULL and not updated anywhere in this
function, and hence the above debug statement will always say that
'create' failed.
+
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ mutex_unlock(&ft_mutex);
+ if (rc)
+ return rc;
+ return count;
+}
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