[PATCH v2] vhost: fix unchecked return value

[Jiayu Hu]

This patch checks the return value of rte_dma_info_get()
called in rte_vhost_async_dma_configure().

Coverity issue: 379066
Fixes: 53d3f4778c1d ("vhost: integrate dmadev in asynchronous data-path")
Cc: sta...@dpdk.org

Signed-off-by: Jiayu Hu <jiayu...@intel.com>
Reviewed-by: Chenbo Xia <chenbo....@intel.com>
---
v2:
- add cc stable tag
---
 lib/vhost/vhost.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
index b14521e4d1..70c04c036e 100644
--- a/lib/vhost/vhost.c
+++ b/lib/vhost/vhost.c
@@ -1868,7 +1868,11 @@ rte_vhost_async_dma_configure(int16_t dma_id, uint16_t 
vchan_id)
                return -1;
        }
 
-       rte_dma_info_get(dma_id, &info);
+       if (rte_dma_info_get(dma_id, &info) != 0) {
+               VHOST_LOG_CONFIG(ERR, "Fail to get DMA %d information.\n", 
dma_id);
+               return -1;
+       }
+
        if (vchan_id >= info.max_vchans) {
                VHOST_LOG_CONFIG(ERR, "Invalid DMA %d vChannel %u.\n", dma_id, 
vchan_id);
                return -1;
-- 
2.25.1