From: Swen Schillig <swen@xxxxxxxxxxxx> A scheduled work might still be pending, running while the adapter is in progress to get dequeued from the system. This can lead to an invalid pointer dereference (Oops). Once the adpater is set online again, ensure the nameserver environment is initialized to the appropriate values again. Signed-off-by: Swen Schillig <swen@xxxxxxxxxxxx> Signed-off-by: Christof Schmitt <christof.schmitt@xxxxxxxxxx> --- drivers/s390/scsi/zfcp_aux.c | 1 - drivers/s390/scsi/zfcp_ccw.c | 3 ++- drivers/s390/scsi/zfcp_fc.c | 8 ++++++-- 3 files changed, 8 insertions(+), 4 deletions(-) diff -urpN linux-2.6/drivers/s390/scsi/zfcp_aux.c linux-2.6-patched/drivers/s390/scsi/zfcp_aux.c --- linux-2.6/drivers/s390/scsi/zfcp_aux.c 2009-03-01 16:41:37.000000000 +0100 +++ linux-2.6-patched/drivers/s390/scsi/zfcp_aux.c 2009-03-01 16:41:37.000000000 +0100 @@ -524,7 +524,6 @@ int zfcp_adapter_enqueue(struct ccw_devi goto sysfs_failed; atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status); - zfcp_fc_nameserver_init(adapter); if (!zfcp_adapter_scsi_register(adapter)) return 0; diff -urpN linux-2.6/drivers/s390/scsi/zfcp_ccw.c linux-2.6-patched/drivers/s390/scsi/zfcp_ccw.c --- linux-2.6/drivers/s390/scsi/zfcp_ccw.c 2009-03-01 16:41:34.000000000 +0100 +++ linux-2.6-patched/drivers/s390/scsi/zfcp_ccw.c 2009-03-01 16:41:37.000000000 +0100 @@ -3,7 +3,7 @@ * * Registration and callback for the s390 common I/O layer. * - * Copyright IBM Corporation 2002, 2008 + * Copyright IBM Corporation 2002, 2009 */ #define KMSG_COMPONENT "zfcp" @@ -108,6 +108,7 @@ static int zfcp_ccw_set_online(struct cc /* initialize request counter */ BUG_ON(!zfcp_reqlist_isempty(adapter)); adapter->req_no = 0; + zfcp_fc_nameserver_init(adapter); zfcp_erp_modify_adapter_status(adapter, "ccsonl1", NULL, ZFCP_STATUS_COMMON_RUNNING, ZFCP_SET); diff -urpN linux-2.6/drivers/s390/scsi/zfcp_fc.c linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c --- linux-2.6/drivers/s390/scsi/zfcp_fc.c 2009-03-01 16:41:36.000000000 +0100 +++ linux-2.6-patched/drivers/s390/scsi/zfcp_fc.c 2009-03-01 16:41:37.000000000 +0100 @@ -98,8 +98,12 @@ static void zfcp_wka_port_offline(struct struct zfcp_wka_port *wka_port = container_of(dw, struct zfcp_wka_port, work); - wait_event(wka_port->completion_wq, - atomic_read(&wka_port->refcount) == 0); + /* Don't wait forvever. If the wka_port is too busy take it offline + through a new call later */ + if (!wait_event_timeout(wka_port->completion_wq, + atomic_read(&wka_port->refcount) == 0, + HZ >> 1)) + return; mutex_lock(&wka_port->mutex); if ((atomic_read(&wka_port->refcount) != 0) || -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
