[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>
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 7872c11..32be4c1 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -62,6 +62,7 @@
extern int ql2xplogiabsentdevice;
extern int ql2xloginretrycount;
extern int ql2xfdmienable;
+extern int ql2xprocessrscn;
extern void qla2x00_sp_compl(scsi_qla_host_t *, srb_t *);
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 8635bd1..a91fea6 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -2653,7 +2653,8 @@
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) {
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 8a539dd..f63af08 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -519,7 +519,8 @@
* 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) ||
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 2430430..4916847 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -71,6 +71,12 @@
"Enables FDMI registratons "
"Default is 0 - no FDMI. 1 - perfom FDMI.");
+int ql2xprocessrscn;
+module_param(ql2xprocessrscn, int, S_IRUGO|S_IRUSR);
+MODULE_PARM_DESC(ql2xprocessrscn,
+ "Option to enable port RSCN handling via a series of less"
+ "fabric intrusive ADISCs and PLOGIs.");
+
/*
* SCSI host template entry points
*/