[PATCH] bus/vdev: fix devargs memory leak

[Mingjin Ye <mingjinx.ye@intel.com>]

When a device is created by a secondary process, an empty devargs is
temporarily generated and bound to it. This causes the device to not
be associated with the correct devargs, and the empty devargs are not
released when the resource is freed.

This patch fixes the issue by matching the devargs when inserting a
device in secondary process.

Fixes: dda987315ca2 ("vdev: make virtual bus use its device struct")
Fixes: a16040453968 ("eal: extract vdev infra")
Cc: stable@dpdk.org

Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
---
 drivers/bus/vdev/vdev.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c
index 7974b27295..fe39a98a9c 100644
--- a/drivers/bus/vdev/vdev.c
+++ b/drivers/bus/vdev/vdev.c
@@ -259,6 +259,22 @@ alloc_devargs(const char *name, const char *args)
 	return devargs;
 }
 
+static struct rte_devargs *
+vdev_devargs_lookup(const char *name)
+{
+	struct rte_devargs *devargs;
+	char dev_name[32];
+
+	RTE_EAL_DEVARGS_FOREACH("vdev", devargs) {
+		devargs->bus->parse(devargs->name, &dev_name);
+		if (strcmp(dev_name, name) == 0) {
+			VDEV_LOG(INFO, "**Devargs matched %s", dev_name);
+			return devargs;
+		}
+	}
+	return NULL;
+}
+
 static int
 insert_vdev(const char *name, const char *args,
 		struct rte_vdev_device **p_dev,
@@ -271,7 +287,11 @@ insert_vdev(const char *name, const char *args,
 	if (name == NULL)
 		return -EINVAL;
 
-	devargs = alloc_devargs(name, args);
+	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
+		devargs = alloc_devargs(name, args);
+	else
+		devargs = vdev_devargs_lookup(name);
+
 	if (!devargs)
 		return -ENOMEM;
 
-- 
2.25.1