[dpdk-stable] [PATCH 3/8] ipc: fix vdev memleak

[Herakliusz Lipiec]

When sending multiple requests, rte_mp_request_sync
can succeed sending a few of those requests, but then
fail on a later one and in the end return with rc=-1.
The upper layers - e.g. device hotplug - currently
handles this case as if no messages were sent and no
memory for response buffers was allocated, which is
not true. Fixed by always freeing the reply message buffers.

Fixes: cdb068f031c6 ("bus/vdev: scan by multi-process channel")
Cc: jianfeng.tan at intel.com
Cc: stable at dpdk.org
Signed-off-by: Herakliusz Lipiec <herakliusz.lipiec at intel.com>
---
 drivers/bus/vdev/vdev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c
index 04f76a63f..7c43f2ddd 100644
--- a/drivers/bus/vdev/vdev.c
+++ b/drivers/bus/vdev/vdev.c
@@ -429,10 +429,9 @@ vdev_scan(void)
 			mp_rep = &mp_reply.msgs[0];
 			resp = (struct vdev_param *)mp_rep->param;
 			VDEV_LOG(INFO, "Received %d vdevs", resp->num);
-			free(mp_reply.msgs);
 		} else
 			VDEV_LOG(ERR, "Failed to request vdev from primary");
-
+		free(mp_reply.msgs);
 		/* Fall through to allow private vdevs in secondary process */
 	}
 
-- 
2.17.2