Author: sephe
Date: Fri Nov 25 07:03:45 2016
New Revision: 309134
URL: https://svnweb.freebsd.org/changeset/base/309134

Log:
  hyperv/vmbus: No stranded bufring GPADL is allowed.
  
  MFC after:    1 week
  Sponsored by: Microsoft
  Differential Revision:        https://reviews.freebsd.org/D8568

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

Modified: head/sys/dev/hyperv/vmbus/vmbus_chan.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus_chan.c      Fri Nov 25 06:48:53 2016        
(r309133)
+++ head/sys/dev/hyperv/vmbus/vmbus_chan.c      Fri Nov 25 07:03:45 2016        
(r309134)
@@ -392,6 +392,8 @@ vmbus_chan_open_br(struct vmbus_channel 
        /*
         * Connect the bufrings, both RX and TX, to this channel.
         */
+       KASSERT(chan->ch_bufring_gpadl == 0,
+           ("bufring GPADL is still connected"));
        error = vmbus_chan_gpadl_connect(chan, cbr->cbr_paddr,
            txbr_size + rxbr_size, &chan->ch_bufring_gpadl);
        if (error) {
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