netdev - [PATCH] net: hns3: fix length overflow when CONFIG_ARM64_64K

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Message-ID: <1522834848-63974-1-git-send-email-tanxiaojun@huawei.com>
Date:   Wed, 4 Apr 2018 17:40:48 +0800
From:   Tan Xiaojun <tanxiaojun@...wei.com>
To:     <yisen.zhuang@...wei.com>, <salil.mehta@...wei.com>
CC:     <huawei.libin@...wei.com>, <tanxiaojun@...wei.com>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <wangzhou1@...ilicon.com>, <linyunsheng@...wei.com>
Subject: [PATCH] net: hns3: fix length overflow when CONFIG_ARM64_64K_PAGES

When enable the config item "CONFIG_ARM64_64K_PAGES", the size of PAGE_SIZE
is 65536(64K). But the type of length is u16, it will overflow. So change it
to u32.

Signed-off-by: Tan Xiaojun <tanxiaojun@...wei.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
index 9e4cfbb..98cdbd3 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -288,7 +288,7 @@ struct hns3_desc_cb {
 	u16 page_offset;
 	u16 reuse_flag;
 
-	u16 length;     /* length of the buffer */
+	u32 length;     /* length of the buffer */
 
        /* desc type, used by the ring user to mark the type of the priv data */
 	u16 type;
-- 
2.7.4