svn commit: r309134 - head/sys/dev/hyperv/vmbus

[Sepherosa Ziehau]

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) {