ieee1394: eth1394: fix error path in module_init

This patch fixes some error handlings in eth1394:

- check return value of kmem_cache_create()
- cleanup resources if hpsb_register_protocol() fails

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (whitespace)

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/ieee1394/eth1394.c b/drivers/ieee1394/eth1394.c
index 1c26322c25af..bd67c862099e 100644
--- a/drivers/ieee1394/eth1394.c
+++ b/drivers/ieee1394/eth1394.c
@@ -1667,17 +1667,26 @@ static struct ethtool_ops ethtool_ops = {
         .get_drvinfo = ether1394_get_drvinfo
 };
 
-static int __init ether1394_init_module (void)
+static int __init ether1394_init_module(void)
 {
+        int err;
+
         packet_task_cache = kmem_cache_create("packet_task",
                                               sizeof(struct packet_task),
                                               0, 0, NULL, NULL);
+        if (!packet_task_cache)
+                return -ENOMEM;
 
         hpsb_register_highlevel(&eth1394_highlevel);
-        return hpsb_register_protocol(&eth1394_proto_driver);
+        err = hpsb_register_protocol(&eth1394_proto_driver);
+        if (err) {
+                hpsb_unregister_highlevel(&eth1394_highlevel);
+                kmem_cache_destroy(packet_task_cache);
+        }
+        return err;
 }
 
-static void __exit ether1394_exit_module (void)
+static void __exit ether1394_exit_module(void)
 {
         hpsb_unregister_protocol(&eth1394_proto_driver);
         hpsb_unregister_highlevel(&eth1394_highlevel);