netdev - [PATCH V2 net-next 15/18] net: hns: Simplify the exception sequence in hns_ppe

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Date:   Fri, 31 Mar 2017 12:20:29 +0100
From:   Salil Mehta <salil.mehta@...wei.com>
To:     <davem@...emloft.net>
CC:     <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <mehta.salil.lnk@...il.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
        Kejian Yan <yankejian@...wei.com>
Subject: [PATCH V2 net-next 15/18] net: hns: Simplify the exception sequence in hns_ppe_init()

From: Kejian Yan <yankejian@...wei.com>

We need to free all ppe submodule if it fails to initialize ppe by
any fault, so this patch will free all ppe resource before
hns_ppe_init() returns exception situation

Reported-by: JinchuanTian <tianjinchuan1@...wei.com>
Signed-off-by: Kejian Yan <yankejian@...wei.com>
Reviewed-by: Salil Mehta <salil.mehta@...wei.com>
Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
index 6ea8722..eba406b 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
@@ -496,17 +496,17 @@ void hns_ppe_get_stats(struct hns_ppe_cb *ppe_cb, u64 *data)
  */
 int hns_ppe_init(struct dsaf_device *dsaf_dev)
 {
-	int i, k;
 	int ret;
+	int i;
 
 	for (i = 0; i < HNS_PPE_COM_NUM; i++) {
 		ret = hns_ppe_common_get_cfg(dsaf_dev, i);
 		if (ret)
-			goto get_ppe_cfg_fail;
+			goto get_cfg_fail;
 
 		ret = hns_rcb_common_get_cfg(dsaf_dev, i);
 		if (ret)
-			goto get_rcb_cfg_fail;
+			goto get_cfg_fail;
 
 		hns_ppe_get_cfg(dsaf_dev->ppe_common[i]);
 
@@ -518,13 +518,12 @@ int hns_ppe_init(struct dsaf_device *dsaf_dev)
 
 	return 0;
 
-get_rcb_cfg_fail:
-	hns_ppe_common_free_cfg(dsaf_dev, i);
-get_ppe_cfg_fail:
-	for (k = i - 1; k >= 0; k--) {
-		hns_rcb_common_free_cfg(dsaf_dev, k);
-		hns_ppe_common_free_cfg(dsaf_dev, k);
+get_cfg_fail:
+	for (i = 0; i < HNS_PPE_COM_NUM; i++) {
+		hns_rcb_common_free_cfg(dsaf_dev, i);
+		hns_ppe_common_free_cfg(dsaf_dev, i);
 	}
+
 	return ret;
 }
 
-- 
2.7.4