linux-kernel - [PATCH][next] net: hinic: fix comparison of a uint16

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Date:   Wed, 23 Aug 2017 16:39:36 +0100
From:   Colin King <colin.king@...onical.com>
To:     Aviad Krawczyk <aviad.krawczyk@...wei.com>, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] net: hinic: fix comparison of a uint16_t type with -1

From: Colin Ian King <colin.king@...onical.com>

The comparison of hw_ioctxt.rx_buf_sz_idx == -1 is always false because
rx_buf_sz_idx is a uint16_t. Fix this by explicitly casting -1 to uint16_t.

Detected by CoverityScan, CID#1454559 ("Operands don't affect result")

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c b/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c
index 09dec6de8dd5..71e26070fb7f 100644
--- a/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c
+++ b/drivers/net/ethernet/huawei/hinic/hinic_hw_dev.c
@@ -352,7 +352,7 @@ static int set_hw_ioctxt(struct hinic_hwdev *hwdev, unsigned int rq_depth,
 		}
 	}
 
-	if (hw_ioctxt.rx_buf_sz_idx == -1)
+	if (hw_ioctxt.rx_buf_sz_idx == (uint16_t)-1)
 		return -EINVAL;
 
 	hw_ioctxt.sq_depth  = ilog2(sq_depth);
-- 
2.14.1