netdev - [PATCH net-stable 04/24] hv_netvsc: Add initialization of tx_table in netvsc_device

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Message-Id: <20180514223223.25433-5-sthemmin@microsoft.com>
Date:   Mon, 14 May 2018 15:32:03 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, Haiyang Zhang <haiyangz@...rosoft.com>
Subject: [PATCH net-stable 04/24] hv_netvsc: Add initialization of tx_table in netvsc_device_add()

From: Haiyang Zhang <haiyangz@...rosoft.com>

commit 6b0cbe315868d613123cf387052ccda5f09d49ea upstream.

tx_table is part of the private data of kernel net_device. It is only
zero-ed out when allocating net_device.

We may recreate netvsc_device w/o recreating net_device, so the private
netdev data, including tx_table, are not zeroed. It may contain channel
numbers for the older netvsc_device.

This patch adds initialization of tx_table each time we recreate
netvsc_device.

Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
---
 drivers/net/hyperv/netvsc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 03b44ec805db..73999214d444 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1252,6 +1252,9 @@ struct netvsc_device *netvsc_device_add(struct hv_device *device,
 	if (!net_device)
 		return ERR_PTR(-ENOMEM);
 
+	for (i = 0; i < VRSS_SEND_TAB_SIZE; i++)
+		net_device_ctx->tx_table[i] = 0;
+
 	net_device->ring_size = ring_size;
 
 	/* Because the device uses NAPI, all the interrupt batching and
-- 
2.17.0