tree cd95581671b4f52b0e27724ff20ce6d3da136c19
parent 43605e293eb13c07acb546c14f407a271837af17
author Long Li <longli@microsoft.com> 1475711866 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1477378330 +0200

hv: do not lose pending heartbeat vmbus packets

The host keeps sending heartbeat packets independent of the
guest responding to them.  Even though we respond to the heartbeat messages at
interrupt level, we can have situations where there maybe multiple heartbeat
messages pending that have not been responded to. For instance this occurs when the
VM is paused and the host continues to send the heartbeat messages.
Address this issue by draining and responding to all
the heartbeat messages that maybe pending.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>