Staging: hv: remove ASSERT() in Channel.c

return an error instead of calling ASSERT() if VmbusPostMessage()
fails.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/hv/Channel.c b/drivers/staging/hv/Channel.c
index 2d8c086..8c30540 100644
--- a/drivers/staging/hv/Channel.c
+++ b/drivers/staging/hv/Channel.c
@@ -551,7 +551,9 @@
 			ret = VmbusPostMessage(gpadlBody,
 					       subMsgInfo->MessageSize -
 					       sizeof(*subMsgInfo));
-			ASSERT(ret == 0);
+			if (!ret)
+				goto Cleanup;
+
 		}
 	}
 	osd_WaitEventWait(msgInfo->WaitEvent);