[SCSI] zfcp: Fix oops when port disappears

The zfcp_port might have been removed, while the FC fast_io_fail timer
is still running and could trigger the terminate_rport_io callback.
Set the pointer to the zfcp_port to NULL and check accordingly
before using it.

Reviewed-by: Martin Petermann <martin@linux.vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index a00d2bb9559c..3ac27ee47396 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -671,8 +671,7 @@ void zfcp_port_dequeue(struct zfcp_port *port)
         list_del(&port->list);
         write_unlock_irq(&zfcp_data.config_lock);
         if (port->rport)
-                fc_remote_port_delete(port->rport);
-        port->rport = NULL;
+                port->rport->dd_data = NULL;
         zfcp_adapter_put(port->adapter);
         sysfs_remove_group(&port->sysfs_device.kobj, &zfcp_sysfs_port_attrs);
         device_unregister(&port->sysfs_device);