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Subject[PATCH respin] 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>
---
drivers/net/ucc_geth.c | 17 ++++++++++-------
1 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index 7dedc96..18a6f48 100644
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -2080,8 +2080,10 @@ 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);
@@ -2312,10 +2314,6 @@ 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))
@@ -3949,6 +3947,10 @@ 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 */
@@ -4002,9 +4004,10 @@ 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;
}
--
1.5.0.6
-
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