Author: sephe
Date: Wed Sep 28 04:25:25 2016
New Revision: 306389
URL: https://svnweb.freebsd.org/changeset/base/306389

Log:
  hyperv/vmbus: Add function to drain channel interrupt task.
  
  MFC after:    1 week
  Sponsored by: Microsoft
  Differential Revision:        https://reviews.freebsd.org/D8045

Modified:
  head/sys/dev/hyperv/include/vmbus.h
  head/sys/dev/hyperv/vmbus/vmbus_chan.c

Modified: head/sys/dev/hyperv/include/vmbus.h
==============================================================================
--- head/sys/dev/hyperv/include/vmbus.h Wed Sep 28 04:22:06 2016        
(r306388)
+++ head/sys/dev/hyperv/include/vmbus.h Wed Sep 28 04:25:25 2016        
(r306389)
@@ -133,6 +133,7 @@ int         vmbus_chan_open_br(struct vmbus_cha
                    const struct vmbus_chan_br *cbr, const void *udata,
                    int udlen, vmbus_chan_callback_t cb, void *cbarg);
 void           vmbus_chan_close(struct vmbus_channel *chan);
+void           vmbus_chan_intr_drain(struct vmbus_channel *chan);
 
 int            vmbus_chan_gpadl_connect(struct vmbus_channel *chan,
                    bus_addr_t paddr, int size, uint32_t *gpadl);

Modified: head/sys/dev/hyperv/vmbus/vmbus_chan.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus_chan.c      Wed Sep 28 04:22:06 2016        
(r306388)
+++ head/sys/dev/hyperv/vmbus/vmbus_chan.c      Wed Sep 28 04:25:25 2016        
(r306389)
@@ -756,6 +756,13 @@ vmbus_chan_close(struct vmbus_channel *c
        vmbus_chan_close_internal(chan);
 }
 
+void
+vmbus_chan_intr_drain(struct vmbus_channel *chan)
+{
+
+       taskqueue_drain(chan->ch_tq, &chan->ch_task);
+}
+
 int
 vmbus_chan_send(struct vmbus_channel *chan, uint16_t type, uint16_t flags,
     void *data, int dlen, uint64_t xactid)
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