examples/vhost_blk: check driver start failure

This checks the return value from the function
rte_vhost_driver_start.

Coverity issue: 362027
Fixes: c19beb3f38cd ("examples/vhost_blk: introduce vhost storage sample")
Cc: stable@dpdk.org
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>

diff --git a/examples/vhost_blk/vhost_blk.c b/examples/vhost_blk/vhost_blk.c
index f4c5943..8f5d61a 100644 (file)
--- a/examples/vhost_blk/vhost_blk.c
+++ b/examples/vhost_blk/vhost_blk.c
@@ -877,7 +877,11 @@ int main(int argc, char *argv[])
 
        signal(SIGINT, signal_handler);
 
-       rte_vhost_driver_start(dev_pathname);
+       ret = rte_vhost_driver_start(dev_pathname);
+       if (ret < 0) {
+               fprintf(stderr, "Failed to start vhost driver.\n");
+               return -1;
+       }
 
        /* loop for exit the application */
        while (1)