hyperv/vmbus: Zero out GPADL if error happens.

MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8601
svn path=/head/; revision=309224
2016-11-28 04:53:36 +00:00 · 2016-11-28 04:53:36 +00:00 · faaba341e5 · 2020-12-20 02:59:44 +00:00
commit faaba341e5
parent 0ffc652e9e
1 changed files with 6 additions and 0 deletions
--- a/sys/dev/hyperv/vmbus/vmbus_chan.c
+++ b/sys/dev/hyperv/vmbus/vmbus_chan.c
@ -502,6 +502,12 @@ vmbus_chan_gpadl_connect(struct vmbus_channel *chan, bus_addr_t paddr,
 	int page_count, range_len, i, cnt, error;
 	uint64_t page_id;

+	/*
+	 * Reset GPADL, so that the result would consistent, if error
+	 * happened later on.
+	 */
+	*gpadl0 = 0;
+
 	/*
 	 * Preliminary checks.
 	 */