ucc_geth: fix module removal

- uccf should be set to NULL to not double-free memory on
  subsequent calls;
- ind_hash_q and group_hash_q lists should be initialized in the
  probe() function, instead of struct_init() (called by open()),
  otherwise there will be an oops if ucc_geth_driver removed
  prior 'ifconfig ethX up';
- add unregister_netdev();
- reorder geth_remove() steps.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index 4ffd873..e41da46 100644 (file)
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -2084,8 +2084,10 @@ static void ucc_geth_memclean(struct ucc_geth_private *ugeth)
        if (!ugeth)
                return;
 
-       if (ugeth->uccf)
+       if (ugeth->uccf) {
                ucc_fast_free(ugeth->uccf);
+               ugeth->uccf = NULL;
+       }
 
        if (ugeth->p_thread_data_tx) {
                qe_muram_free(ugeth->thread_dat_tx_offset);
@@ -2305,10 +2307,6 @@ static int ucc_struct_init(struct ucc_geth_private *ugeth)
        ug_info = ugeth->ug_info;
        uf_info = &ug_info->uf_info;
 
-       /* Create CQs for hash tables */
-       INIT_LIST_HEAD(&ugeth->group_hash_q);
-       INIT_LIST_HEAD(&ugeth->ind_hash_q);
-
        if (!((uf_info->bd_mem_part == MEM_PART_SYSTEM) ||
              (uf_info->bd_mem_part == MEM_PART_MURAM))) {
                if (netif_msg_probe(ugeth))
@@ -3990,6 +3988,10 @@ static int ucc_geth_probe(struct of_device* ofdev, const struct of_device_id *ma
        ugeth = netdev_priv(dev);
        spin_lock_init(&ugeth->lock);
 
+       /* Create CQs for hash tables */
+       INIT_LIST_HEAD(&ugeth->group_hash_q);
+       INIT_LIST_HEAD(&ugeth->ind_hash_q);
+
        dev_set_drvdata(device, dev);
 
        /* Set the dev->base_addr to the gfar reg region */
@@ -4040,9 +4042,10 @@ static int ucc_geth_remove(struct of_device* ofdev)
        struct net_device *dev = dev_get_drvdata(device);
        struct ucc_geth_private *ugeth = netdev_priv(dev);
 
-       dev_set_drvdata(device, NULL);
-       ucc_geth_memclean(ugeth);
+       unregister_netdev(dev);
        free_netdev(dev);
+       ucc_geth_memclean(ugeth);
+       dev_set_drvdata(device, NULL);
 
        return 0;
 }