[SCSI] qla2xxx: Allow the user the option of disabling iIDMA.

iIDMA support requires the driver issue several additional
fabric-managegment (FM) commands per port discovered during SNS
scanning -- GFPN (Get Fabric Port Name) and GPSC (Get Port Speed
Capabilities).  It has been found during testing that some
switches do not respond as *well* as expected to these commands
(silence -- no ACC nor BS_RJT).  So, to handle such conditions,
allow the user the ability to indirectly disable the FM commands
by disabling iIDMA with the ql2xiidmaenable module-parameter.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.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 833a6429d9b9..f4cd2cd874b9 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -2559,7 +2559,8 @@ qla2x00_find_all_fabric_devs(scsi_qla_host_t *ha, struct list_head *new_fcports)
                 } else if (qla2x00_gnn_id(ha, swl) != QLA_SUCCESS) {
                         kfree(swl);
                         swl = NULL;
-                } else if (qla2x00_gfpn_id(ha, swl) == QLA_SUCCESS) {
+                } else if (ql2xiidmaenable &&
+                    qla2x00_gfpn_id(ha, swl) == QLA_SUCCESS) {
                         qla2x00_gpsc(ha, swl);
                 }
         }