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authorMichael Ellerman <michael@ellerman.id.au>2005-08-31 21:29:08 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-08-31 22:39:43 -0400
commitec60beebed497691c97d674c1facac5ca3d7a4b3 (patch)
tree0591903d946969283238116291b2755b1cfa86d2 /drivers/net/iseries_veth.c
parentcbf9074cc30ca0eee19c9bd7304faf9f1beb1e76 (diff)
[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 <michael@ellerman.id.au> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/iseries_veth.c')
-rw-r--r--drivers/net/iseries_veth.c35
1 files changed, 22 insertions, 13 deletions
diff --git a/drivers/net/iseries_veth.c b/drivers/net/iseries_veth.c
index 91d79db96e82..ab9fb218d111 100644
--- a/drivers/net/iseries_veth.c
+++ b/drivers/net/iseries_veth.c
@@ -683,6 +683,14 @@ static void veth_stop_connection(u8 rlp)
683 683
684 /* Wait for the state machine to run. */ 684 /* Wait for the state machine to run. */
685 flush_scheduled_work(); 685 flush_scheduled_work();
686}
687
688static void veth_destroy_connection(u8 rlp)
689{
690 struct veth_lpar_connection *cnx = veth_cnx[rlp];
691
692 if (! cnx)
693 return;
686 694
687 if (cnx->num_events > 0) 695 if (cnx->num_events > 0)
688 mf_deallocate_lp_events(cnx->remote_lp, 696 mf_deallocate_lp_events(cnx->remote_lp,
@@ -694,14 +702,6 @@ static void veth_stop_connection(u8 rlp)
694 HvLpEvent_Type_VirtualLan, 702 HvLpEvent_Type_VirtualLan,
695 cnx->num_ack_events, 703 cnx->num_ack_events,
696 NULL, NULL); 704 NULL, NULL);
697}
698
699static void veth_destroy_connection(u8 rlp)
700{
701 struct veth_lpar_connection *cnx = veth_cnx[rlp];
702
703 if (! cnx)
704 return;
705 705
706 kfree(cnx->msgs); 706 kfree(cnx->msgs);
707 kfree(cnx); 707 kfree(cnx);
@@ -1441,15 +1441,24 @@ int __init veth_module_init(void)
1441 1441
1442 for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) { 1442 for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
1443 rc = veth_init_connection(i); 1443 rc = veth_init_connection(i);
1444 if (rc != 0) { 1444 if (rc != 0)
1445 veth_module_cleanup(); 1445 goto error;
1446 return rc;
1447 }
1448 } 1446 }
1449 1447
1450 HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan, 1448 HvLpEvent_registerHandler(HvLpEvent_Type_VirtualLan,
1451 &veth_handle_event); 1449 &veth_handle_event);
1452 1450
1453 return vio_register_driver(&veth_driver); 1451 rc = vio_register_driver(&veth_driver);
1452 if (rc != 0)
1453 goto error;
1454
1455 return 0;
1456
1457error:
1458 for (i = 0; i < HVMAXARCHITECTEDLPS; ++i) {
1459 veth_destroy_connection(i);
1460 }
1461
1462 return rc;
1454} 1463}
1455module_init(veth_module_init); 1464module_init(veth_module_init);