[PATCH 6/6] Drivers: hv: vmbus: Handle channel rescind message correctly

["K. Y. Srinivasan" <kys@microsoft.com>]

Properly cleanup the channel state on receipt of the "offer rescind" message.
Starting with ws2012, the host requires that the channel "relid" be properly
cleaned up when the offer is rescinded.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
---
 drivers/hv/channel_mgmt.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index ff1be16..bad8128 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -165,8 +165,19 @@ static void vmbus_process_rescind_offer(struct work_struct *work)
 	struct vmbus_channel *channel = container_of(work,
 						     struct vmbus_channel,
 						     work);
+	unsigned long flags;
+	struct vmbus_channel_relid_released msg;
 
 	vmbus_device_unregister(channel->device_obj);
+	memset(&msg, 0, sizeof(struct vmbus_channel_relid_released));
+	msg.child_relid = channel->offermsg.child_relid;
+	msg.header.msgtype = CHANNELMSG_RELID_RELEASED;
+	vmbus_post_msg(&msg, sizeof(struct vmbus_channel_relid_released));
+
+	spin_lock_irqsave(&vmbus_connection.channel_lock, flags);
+	list_del(&channel->listentry);
+	spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
+	free_channel(channel);
 }
 
 void vmbus_free_channels(void)
-- 
1.7.4.1