Commit 4a54243f authored Aug 01, 2015 by Vitaly Kuznetsov Committed by Greg Kroah-Hartman Aug 04, 2015

Drivers: hv: vmbus: don't send CHANNELMSG_UNLOAD on pre-Win2012R2 hosts



Pre-Win2012R2 hosts don't properly handle CHANNELMSG_UNLOAD and
wait_for_completion() hangs. Avoid sending such request on old hosts.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent e26009aa

drivers/hv/channel_mgmt.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -469,6 +469,10 @@ void vmbus_initiate_unload(void)
		{
		struct vmbus_channel_message_header hdr;

		/* Pre-Win2012R2 hosts don't support reconnect */
		if (vmbus_proto_version < VERSION_WIN8_1)
		return;

		init_completion(&vmbus_connection.unload_event);
		memset(&hdr, 0, sizeof(struct vmbus_channel_message_header));
		hdr.msgtype = CHANNELMSG_UNLOAD;