tree 0591903d946969283238116291b2755b1cfa86d2
parent cbf9074cc30ca0eee19c9bd7304faf9f1beb1e76
author Michael Ellerman <[EMAIL PROTECTED]> Thu, 01 Sep 2005 11:29:08 +1000
committer Jeff Garzik <[EMAIL PROTECTED]> Thu, 01 Sep 2005 06:39:43 -0400
[PATCH] iseries_veth: Make init_connection() & destroy_connection() symmetrical
This patch makes veth_init_connection() and veth_destroy_connection()
symmetrical in that they allocate/deallocate the same data.
Currently if there's an error while initialising connections (ie. ENOMEM)
we call veth_module_cleanup(), however this will oops because we call
driver_unregister() before we've called driver_register(). I've never seen
this actually happen though.
So instead we explicitly call veth_destroy_connection() for each connection,
any that have been set up will be deallocated.
We also fix a potential leak if vio_register_driver() fails.
Signed-off-by: Michael Ellerman <[EMAIL PROTECTED]>
Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
drivers/net/iseries_veth.c | 35 ++++++++++++++++++++++-------------
1 files changed, 22 insertions(+), 13 deletions(-)
diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c
--- a/drivers/net/iseries_veth.c
+++ b/drivers/net/iseries_veth.c
@@ -683,6 +683,14 @@ static void veth_stop_connection(u8 rlp)
/* Wait for the state machine to run. */
flush_scheduled_work();
+}
+
+static void veth_destroy_connection(u8 rlp)
+{
+ struct veth_lpar_connection *cnx = veth_cnx[rlp];
+
+ if (! cnx)
+ return;
if (cnx->num_events > 0)
mf_deallocate_lp_events(cnx->remote_lp,
@@ -694,14 +702,6 @@ static void veth_stop_connection(u8 rlp)
HvLpEvent_Type_VirtualLan,
cnx->num_ack_events,
NULL, NULL);
-}
-
-static void veth_destroy_connection(u8 rlp)
-{
- struct veth_lpar_connection *cnx = veth_cnx[rlp];
-
- if (! cnx)
- return;
kfree(cnx->msgs);
kfree(cnx);
@@ -1441,15 +1441,24 @@ int __init veth_module_init(void)
for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
rc = veth_init_connection(i);
- if (rc != 0) {
- veth_module_cleanup();
- return rc;
- }
+ if (rc != 0)
+ goto error;
}
HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan,
&veth_handle_event);
- return vio_register_driver(&veth_driver);
+ rc = vio_register_driver(&veth_driver);
+ if (rc != 0)
+ goto error;
+
+ return 0;
+
+error:
+ for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
+ veth_destroy_connection(i);
+ }
+
+ return rc;
}
module_init(veth_module_init);
-
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