[PATCH v2] bus/vdev: revert fix devargs after multi-process bus scan

[Mingjin Ye]

This patch reverts commit f5b2eff0847d ("bus/vdev: fix devargs after
multi-process bus scan")

With current code, we do not add devargs to devargs list when we add a
vdev in secondary process (because `init` flag is set to `false`).

Because of this, when we do vdev_uninit, we call rte_devargs_remove on
the &devargs pointer (the one we didn't add to devargs list but did save
inside rte_vdev_device struct), but in secondary process, because
devargs were not added to the list in the first place, devargs_remove
does not find the associated devargs in its list and therefore does not
free associated resources. As a result, we get a memory leak, because we
free the rte_vdev_device but not its associated devargs.

Revert this patch to avoid leaking devargs on vdev uninit.

Fixes: f5b2eff0847d ("bus/vdev: fix devargs after multi-process bus scan")
Cc: stable at dpdk.org

Signed-off-by: Mingjin Ye <mingjinx.ye at intel.com>
---
v2: Modify commit log.
---
 drivers/bus/vdev/vdev.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c
index beee8c4033..7d5f862ff5 100644
--- a/drivers/bus/vdev/vdev.c
+++ b/drivers/bus/vdev/vdev.c
@@ -269,9 +269,7 @@ alloc_devargs(const char *name, const char *args)
 }
 
 static int
-insert_vdev(const char *name, const char *args,
-		struct rte_vdev_device **p_dev,
-		bool init)
+insert_vdev(const char *name, const char *args, struct rte_vdev_device **p_dev)
 {
 	struct rte_vdev_device *dev;
 	struct rte_devargs *devargs;
@@ -304,8 +302,7 @@ insert_vdev(const char *name, const char *args,
 		goto fail;
 	}
 
-	if (init)
-		rte_devargs_insert(&devargs);
+	rte_devargs_insert(&devargs);
 	dev->device.devargs = devargs;
 	dev->device.name = devargs->name;
 	TAILQ_INSERT_TAIL(&vdev_device_list, dev, next);
@@ -329,7 +326,7 @@ rte_vdev_init(const char *name, const char *args)
 	int ret;
 
 	rte_spinlock_recursive_lock(&vdev_device_list_lock);
-	ret = insert_vdev(name, args, &dev, true);
+	ret = insert_vdev(name, args, &dev);
 	if (ret == 0) {
 		ret = vdev_probe_all_drivers(dev);
 		if (ret) {
@@ -456,7 +453,7 @@ vdev_action(const struct rte_mp_msg *mp_msg, const void *peer)
 		break;
 	case VDEV_SCAN_ONE:
 		VDEV_LOG(INFO, "receive vdev, %s", in->name);
-		ret = insert_vdev(in->name, NULL, NULL, false);
+		ret = insert_vdev(in->name, NULL, NULL);
 		if (ret == -EEXIST)
 			VDEV_LOG(DEBUG, "device already exist, %s", in->name);
 		else if (ret < 0)
-- 
2.25.1