[PATCH v7 2/2] examples/vhost: unconfigure DMA vchannel

[xuan.ding@intel.com]

From: Xuan Ding <xuan.ding@intel.com>

This patch applies rte_vhost_async_dma_unconfigure() to manually free
DMA vchannels. Before unconfiguration, make sure the specified DMA
device is no longer used by any vhost ports.

Signed-off-by: Xuan Ding <xuan.ding@intel.com>
---
 examples/vhost/main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index ac78704d79..42e53a0f9a 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -2066,6 +2066,14 @@ main(int argc, char *argv[])
 	RTE_LCORE_FOREACH_WORKER(lcore_id)
 		rte_eal_wait_lcore(lcore_id);
 
+	for (i = 0; i < dma_count; i++) {
+		if (rte_vhost_async_dma_unconfigure(dmas_id[i], 0) < 0) {
+			RTE_LOG(ERR, VHOST_PORT,
+				"Failed to unconfigure DMA %d in vhost.\n", dmas_id[i]);
+			rte_exit(EXIT_FAILURE, "Cannot use given DMA device\n");
+		}
+	}
+
 	/* clean up the EAL */
 	rte_eal_cleanup();
 
-- 
2.17.1