[PATCH 1/2] scsi: be2iscsi: simplify cid_array allocation

[Rosen Penev <rosenp@gmail.com>]

Use kzalloc_flex to allocate cid_array to allocate cid_array as part of
the overall struct.

Add __counted_by for extra runtime analysis.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/scsi/be2iscsi/be_main.c | 17 ++---------------
 drivers/scsi/be2iscsi/be_main.h |  2 +-
 2 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index fd18d4d3d219..aa5320535c1f 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -3992,25 +3992,14 @@ static int hba_setup_cid_tbls(struct beiscsi_hba *phba)
 
 	for (ulp_num = 0; ulp_num < BEISCSI_ULP_COUNT; ulp_num++) {
 		if (test_bit(ulp_num, (void *)&phba->fw_config.ulp_supported)) {
-			ptr_cid_info = kzalloc_obj(struct ulp_cid_info);
+			ptr_cid_info = kzalloc_flex(*ptr_cid_info, cid_array,
+						    BEISCSI_GET_CID_COUNT(phba, ulp_num));
 
 			if (!ptr_cid_info) {
 				ret = -ENOMEM;
 				goto free_memory;
 			}
 
-			/* Allocate memory for CID array */
-			ptr_cid_info->cid_array =
-				kcalloc(BEISCSI_GET_CID_COUNT(phba, ulp_num),
-					sizeof(*ptr_cid_info->cid_array),
-					GFP_KERNEL);
-			if (!ptr_cid_info->cid_array) {
-				kfree(ptr_cid_info);
-				ptr_cid_info = NULL;
-				ret = -ENOMEM;
-
-				goto free_memory;
-			}
 			ptr_cid_info->avlbl_cids = BEISCSI_GET_CID_COUNT(
 						   phba, ulp_num);
 
@@ -4061,7 +4050,6 @@ static int hba_setup_cid_tbls(struct beiscsi_hba *phba)
 			ptr_cid_info = phba->cid_array_info[ulp_num];
 
 			if (ptr_cid_info) {
-				kfree(ptr_cid_info->cid_array);
 				kfree(ptr_cid_info);
 				phba->cid_array_info[ulp_num] = NULL;
 			}
@@ -4175,7 +4163,6 @@ static void beiscsi_cleanup_port(struct beiscsi_hba *phba)
 			ptr_cid_info = phba->cid_array_info[ulp_num];
 
 			if (ptr_cid_info) {
-				kfree(ptr_cid_info->cid_array);
 				kfree(ptr_cid_info);
 				phba->cid_array_info[ulp_num] = NULL;
 			}
diff --git a/drivers/scsi/be2iscsi/be_main.h b/drivers/scsi/be2iscsi/be_main.h
index 71c95d144560..b5f8e746deab 100644
--- a/drivers/scsi/be2iscsi/be_main.h
+++ b/drivers/scsi/be2iscsi/be_main.h
@@ -241,10 +241,10 @@ struct hwi_wrb_context {
 };
 
 struct ulp_cid_info {
-	unsigned short *cid_array;
 	unsigned short avlbl_cids;
 	unsigned short cid_alloc;
 	unsigned short cid_free;
+	unsigned short cid_array[] __counted_by(avlbl_cids);
 };
 
 #include "be.h"
-- 
2.53.0