[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_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 8635bd1ae8a0..a91fea69ad63 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -2653,7 +2653,8 @@ qla2x00_device_resync(scsi_qla_host_t *ha)
 
                 switch (format) {
                 case 0:
-                        if (!IS_QLA2100(ha) && !IS_QLA2200(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) {