[PATCH v3 3/6] scsi: megaraid_sas: Replace one-element array with flexible-array member in MR_DRV_RAID_MAP

["Gustavo A. R. Silva" <gustavoars@kernel.org>]

One-element arrays are deprecated, and we are replacing them with
flexible array members, instead. So, replace one-element array with
flexible-array member in struct MR_DRV_RAID_MAP and refactor the
code accordingly.

This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
routines on memcpy().

Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/109
Enhanced-by: Kees Cook <keescook@chromium.org> # Change in struct MR_DRV_RAID_MAP_ALL
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
Changes in v3:
 - Revert use of flex_array_size() helper.
 - Modify MR_DRV_RAID_MAP_ALL structure.

Changes in v2:
 - None.

 drivers/scsi/megaraid/megaraid_sas_fusion.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h
index 66e13b74fcdc..df92d4369e04 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.h
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.h
@@ -1182,7 +1182,7 @@ struct MR_DRV_RAID_MAP {
 		devHndlInfo[MAX_RAIDMAP_PHYSICAL_DEVICES_DYN];
 	u16 ldTgtIdToLd[MAX_LOGICAL_DRIVES_DYN];
 	struct MR_ARRAY_INFO arMapInfo[MAX_API_ARRAYS_DYN];
-	struct MR_LD_SPAN_MAP      ldSpanMap[1];
+	struct MR_LD_SPAN_MAP      ldSpanMap[];
 
 };
 
@@ -1193,7 +1193,7 @@ struct MR_DRV_RAID_MAP {
 struct MR_DRV_RAID_MAP_ALL {
 
 	struct MR_DRV_RAID_MAP raidMap;
-	struct MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES_DYN - 1];
+	struct MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES_DYN];
 } __packed;
 
 
-- 
2.34.1