linux-kernel - [PATCH 4.14 76/77] net: hns: fix unsigned comparison to less than zero

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Date:   Mon,  1 Jun 2020 19:54:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Colin Ian King <colin.king@...onical.com>,
        Mukesh Ojha <mojha@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 4.14 76/77] net: hns: fix unsigned comparison to less than zero

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

commit ea401685a20b5d631957f024bda86e1f6118eb20 upstream.

Currently mskid is unsigned and hence comparisons with negative
error return values are always false. Fix this by making mskid an
int.

Fixes: f058e46855dc ("net: hns: fix ICMP6 neighbor solicitation messages discard problem")
Addresses-Coverity: ("Operands don't affect result")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Reviewed-by: Mukesh Ojha <mojha@...eaurora.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Cc: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_main.c
@@ -2770,7 +2770,7 @@ static void set_promisc_tcam_enable(stru
 	struct hns_mac_cb *mac_cb;
 	u8 addr[ETH_ALEN] = {0};
 	u8 port_num;
-	u16 mskid;
+	int mskid;

 	/* promisc use vague table match with vlanid = 0 & macaddr = 0 */
 	hns_dsaf_set_mac_key(dsaf_dev, &mac_key, 0x00, port, addr);