[PATCH] scsi: be2iscsi: kzalloc + kcalloc to kzalloc_flex

[Rosen Penev]

Simplifies allocation by using a flexible array member

Added __counted_by for extra runtime analysis.

Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
---
 drivers/scsi/be2iscsi/be_main.c | 27 ++-------------------------
 drivers/scsi/be2iscsi/be_main.h |  4 ++--
 2 files changed, 4 insertions(+), 27 deletions(-)

diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index fd18d4d3d219..782a21af01a3 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -2470,22 +2470,15 @@ static int beiscsi_alloc_mem(struct beiscsi_hba *phba)
 	struct mem_array *mem_arr, *mem_arr_orig;
 	unsigned int i, j, alloc_size, curr_alloc_size;
 
-	phba->phwi_ctrlr = kzalloc(phba->params.hwi_ws_sz, GFP_KERNEL);
+	phba->phwi_ctrlr = kzalloc_flex(*phba->phwi_ctrlr, wrb_context, phba->params.cxns_per_ctrl);
 	if (!phba->phwi_ctrlr)
 		return -ENOMEM;
 
 	/* Allocate memory for wrb_context */
 	phwi_ctrlr = phba->phwi_ctrlr;
-	phwi_ctrlr->wrb_context = kzalloc_objs(struct hwi_wrb_context,
-					       phba->params.cxns_per_ctrl);
-	if (!phwi_ctrlr->wrb_context) {
-		kfree(phba->phwi_ctrlr);
-		return -ENOMEM;
-	}
 
 	phba->init_mem = kzalloc_objs(*mem_descr, SE_MEM_MAX);
 	if (!phba->init_mem) {
-		kfree(phwi_ctrlr->wrb_context);
 		kfree(phba->phwi_ctrlr);
 		return -ENOMEM;
 	}
@@ -2493,7 +2486,6 @@ static int beiscsi_alloc_mem(struct beiscsi_hba *phba)
 	mem_arr_orig = kmalloc_objs(*mem_arr_orig, BEISCSI_MAX_FRAGS_INIT);
 	if (!mem_arr_orig) {
 		kfree(phba->init_mem);
-		kfree(phwi_ctrlr->wrb_context);
 		kfree(phba->phwi_ctrlr);
 		return -ENOMEM;
 	}
@@ -3992,25 +3984,12 @@ 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 +4040,6 @@ 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 +4153,6 @@ 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..77c9b1a1a488 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"
@@ -968,10 +968,10 @@ struct be_ring {
 };
 
 struct hwi_controller {
-	struct hwi_wrb_context *wrb_context;
 	struct be_ring default_pdu_hdr[BEISCSI_ULP_COUNT];
 	struct be_ring default_pdu_data[BEISCSI_ULP_COUNT];
 	struct hwi_context_memory *phwi_ctxt;
+	struct hwi_wrb_context wrb_context[];
 };
 
 enum hwh_type_enum {
-- 
2.53.0