[SCSI] qla2xxx: Disable port-type RSCN handling via driver state-machine.

Given the semantic changes in both the device-model and
fc-transport APIs, the driver's handling of port-type RSCNs
via a series of ADISCs and PLOGIs can cause series of
badness ranging from unexpectedly device loss to devices not
being discovered.

In the interim, disable (via a module-parameter) this
feature and allow RSCN management to continue to occur
within the driver's DPC thread.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 8a539dd48753..f63af081d4ff 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -519,7 +519,8 @@ qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
                  * us, create a new entry in our rscn fcports list and handle
                  * the event like an RSCN.
                  */
-                if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
+                if (ql2xprocessrscn &&
+                    !IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
                     !IS_QLA6322(ha) && !IS_QLA24XX(ha) && !IS_QLA25XX(ha) &&
                     ha->flags.init_done && mb[1] != 0xffff &&
                     ((ha->operating_mode == P2P && mb[1] != 0) ||