[dpdk-stable] patch 'net/ixgbe/base: fix check for NACK' has been queued to stable release 16.07.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 16.07.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable
yet. It will be pushed if I get no objections before this Friday.
So please shutout if anyone has objections.

Thanks.

	--yliu

---
>From fec4e7b4d89a159fd533ad0ffc5fd7ae21072405 Mon Sep 17 00:00:00 2001
From: Xiao Wang <xiao.w.wang at intel.com>
Date: Sun, 25 Sep 2016 16:59:55 +0800
Subject: [PATCH] net/ixgbe/base: fix check for NACK

[ upstream commit 644a79d9314147a4ea8a2931cd5206aa53047fac ]

Previously we checked return buffer for
(IXGBE_VF_SET_MACVLAN | IXGBE_VT_MSGTYPE_NACK), but this would not
work if index is not 0 and as a result NACK will not be detected.

Fixes: af75078fece3 ("first public release")

Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu at intel.com>
---
 drivers/net/ixgbe/base/ixgbe_vf.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ixgbe/base/ixgbe_vf.c b/drivers/net/ixgbe/base/ixgbe_vf.c
index a75074a..26c0d81 100644
--- a/drivers/net/ixgbe/base/ixgbe_vf.c
+++ b/drivers/net/ixgbe/base/ixgbe_vf.c
@@ -490,7 +490,7 @@ s32 ixgbe_get_mac_addr_vf(struct ixgbe_hw *hw, u8 *mac_addr)
 s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
 {
 	struct ixgbe_mbx_info *mbx = &hw->mbx;
-	u32 msgbuf[3];
+	u32 msgbuf[3], msgbuf_chk;
 	u8 *msg_addr = (u8 *)(&msgbuf[1]);
 	s32 ret_val;
 
@@ -503,18 +503,19 @@ s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
 	 */
 	msgbuf[0] |= index << IXGBE_VT_MSGINFO_SHIFT;
 	msgbuf[0] |= IXGBE_VF_SET_MACVLAN;
+	msgbuf_chk = msgbuf[0];
 	if (addr)
 		memcpy(msg_addr, addr, 6);
 	ret_val = mbx->ops.write_posted(hw, msgbuf, 3, 0);
 
 	if (!ret_val)
 		ret_val = mbx->ops.read_posted(hw, msgbuf, 3, 0);
+	if (!ret_val) {
+		msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
 
-	msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
-
-	if (!ret_val)
-		if (msgbuf[0] == (IXGBE_VF_SET_MACVLAN | IXGBE_VT_MSGTYPE_NACK))
-			ret_val = IXGBE_ERR_OUT_OF_MEM;
+		if (msgbuf[0] == (msgbuf_chk | IXGBE_VT_MSGTYPE_NACK))
+			return IXGBE_ERR_OUT_OF_MEM;
+	}
 
 	return ret_val;
 }
-- 
1.9.0