From: Himanshu Madhani <himanshu.madhani@cavium.com>
Date: Fri, 13 Oct 2017 09:34:03 -0700
Subject: scsi: qla2xxx: Reinstate module parameter ql2xenablemsix
Patch-mainline: v4.15-rc1
Git-commit: e7240af5108fc8b068b1b21988e48f0c5005cae6
References: FATE#322910
[mkp: fixed whitespace]
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/scsi/qla2xxx/qla_gbl.h | 1 +
drivers/scsi/qla2xxx/qla_isr.c | 9 ++++++---
drivers/scsi/qla2xxx/qla_os.c | 9 +++++++++
3 files changed, 16 insertions(+), 3 deletions(-)
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -145,6 +145,7 @@ extern int ql2xmvasynctoatio;
extern int ql2xuctrlirq;
extern int ql2xnvmeenable;
extern int ql2xautodetectsfp;
+extern int ql2xenablemsix;
extern int qla2x00_loop_reset(scsi_qla_host_t *);
extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -3486,11 +3486,14 @@ qla2x00_request_irqs(struct qla_hw_data
scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
/* If possible, enable MSI-X. */
- if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha) &&
- !IS_CNA_CAPABLE(ha) && !IS_QLA2031(ha) && !IS_QLAFX00(ha) &&
- !IS_QLA27XX(ha))
+ if (ql2xenablemsix == 0 || (!IS_QLA2432(ha) && !IS_QLA2532(ha) &&
+ !IS_QLA8432(ha) && !IS_CNA_CAPABLE(ha) && !IS_QLA2031(ha) &&
+ !IS_QLAFX00(ha) && !IS_QLA27XX(ha)))
goto skip_msi;
+ if (ql2xenablemsix == 2)
+ goto skip_msix;
+
if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
(ha->pdev->subsystem_device == 0x7040 ||
ha->pdev->subsystem_device == 0x7041 ||
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -268,6 +268,15 @@ MODULE_PARM_DESC(ql2xautodetectsfp,
"Detect SFP range and set appropriate distance.\n"
"1 (Default): Enable\n");
+int ql2xenablemsix = 1;
+module_param(ql2xenablemsix, int, 0444);
+MODULE_PARM_DESC(ql2xenablemsix,
+ "Set to enable MSI or MSI-X interrupt mechanism.\n"
+ " Default is 1, enable MSI-X interrupt mechanism.\n"
+ " 0 -- enable traditional pin-based mechanism.\n"
+ " 1 -- enable MSI-X interrupt mechanism.\n"
+ " 2 -- enable MSI interrupt mechanism.\n");
+
/*
* SCSI host template entry points
*/