[SCSI] megaraid_sas: Fix reglockFlags for degraded raid5/6

The following patch for megaraid_sas fixes the reglockFlags field for
degraded raid5/6 for MR9360/9380, which will result in a performance
improvement.

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c
index 5255dd688aca..294abb0defa6 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fp.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fp.c
@@ -282,7 +282,9 @@ u8 MR_GetPhyParams(struct megasas_instance *instance, u32 ld, u64 stripRow,
         else {
                 *pDevHandle = MR_PD_INVALID; /* set dev handle as invalid. */
                 if ((raid->level >= 5) &&
-                    (instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER))
+                    ((instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) ||
+                     (instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER &&
+                      raid->regTypeReqOnRead != REGION_TYPE_UNUSED)))
                         pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE;
                 else if (raid->level == 1) {
                         /* Get alternate Pd. */