ice: make use of DEFINE_FLEX() in ice_ddp.c

Use DEFINE_FLEX() macro for constant-num-of-elems (4)
flex array members of ice_ddp.c
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Link: https://lore.kernel.org/r/20230912115937.1645707-5-przemyslaw.kitszel@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/intel/ice/ice_ddp.c

@@ -1560,21 +1560,14 @@ static enum ice_ddp_state ice_init_pkg_info(struct ice_hw *hw,
  */
 static enum ice_ddp_state ice_get_pkg_info(struct ice_hw *hw)
 {
-	enum ice_ddp_state state = ICE_DDP_PKG_SUCCESS;
-	struct ice_aqc_get_pkg_info_resp *pkg_info;
-	u16 size;
+	DEFINE_FLEX(struct ice_aqc_get_pkg_info_resp, pkg_info, pkg_info,
+		    ICE_PKG_CNT);
+	u16 size = __struct_size(pkg_info);
 	u32 i;
 
-	size = struct_size(pkg_info, pkg_info, ICE_PKG_CNT);
-	pkg_info = kzalloc(size, GFP_KERNEL);
-	if (!pkg_info)
+	if (ice_aq_get_pkg_info_list(hw, pkg_info, size, NULL))
 		return ICE_DDP_PKG_ERR;
 
-	if (ice_aq_get_pkg_info_list(hw, pkg_info, size, NULL)) {
-		state = ICE_DDP_PKG_ERR;
-		goto init_pkg_free_alloc;
-	}
-
 	for (i = 0; i < le32_to_cpu(pkg_info->count); i++) {
 #define ICE_PKG_FLAG_COUNT 4
 		char flags[ICE_PKG_FLAG_COUNT + 1] = { 0 };
@@ -1604,10 +1597,7 @@ static enum ice_ddp_state ice_get_pkg_info(struct ice_hw *hw)
 			  pkg_info->pkg_info[i].name, flags);
 	}
 
-init_pkg_free_alloc:
-	kfree(pkg_info);
-
-	return state;
+	return ICE_DDP_PKG_SUCCESS;
 }
 
 /**
@@ -1622,9 +1612,10 @@ static enum ice_ddp_state ice_chk_pkg_compat(struct ice_hw *hw,
 					     struct ice_pkg_hdr *ospkg,
 					     struct ice_seg **seg)
 {
-	struct ice_aqc_get_pkg_info_resp *pkg;
+	DEFINE_FLEX(struct ice_aqc_get_pkg_info_resp, pkg, pkg_info,
+		    ICE_PKG_CNT);
+	u16 size = __struct_size(pkg);
 	enum ice_ddp_state state;
-	u16 size;
 	u32 i;
 
 	/* Check package version compatibility */
@@ -1643,15 +1634,8 @@ static enum ice_ddp_state ice_chk_pkg_compat(struct ice_hw *hw,
 	}
 
 	/* Check if FW is compatible with the OS package */
-	size = struct_size(pkg, pkg_info, ICE_PKG_CNT);
-	pkg = kzalloc(size, GFP_KERNEL);
-	if (!pkg)
-		return ICE_DDP_PKG_ERR;
-
-	if (ice_aq_get_pkg_info_list(hw, pkg, size, NULL)) {
-		state = ICE_DDP_PKG_LOAD_ERROR;
-		goto fw_ddp_compat_free_alloc;
-	}
+	if (ice_aq_get_pkg_info_list(hw, pkg, size, NULL))
+		return ICE_DDP_PKG_LOAD_ERROR;
 
 	for (i = 0; i < le32_to_cpu(pkg->count); i++) {
 		/* loop till we find the NVM package */
@@ -1668,8 +1652,7 @@ static enum ice_ddp_state ice_chk_pkg_compat(struct ice_hw *hw,
 		/* done processing NVM package so break */
 		break;
 	}
-fw_ddp_compat_free_alloc:
-	kfree(pkg);
+
 	return state;
 }