refactor vdpa specific devargs parsing to more generic way

Signed-off-by: Ivan Dyukov <redacted>
---
drivers/net/virtio/virtio_ethdev.c | 35 +++++++++++++++++++++---------
1 file changed, 25 insertions(+), 10 deletions(-)

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 044eb10a7..22323d9a5 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c

@@ -1955,16 +1955,18 @@ eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)

}

static int vdpa_check_handler(__rte_unused const char *key,
-		const char *value, __rte_unused void *opaque)
+		const char *value, void *ret_val)
{
-	if (strcmp(value, "1"))
-		return -1;
+	if (strcmp(value, "1") == 0)
+		*(int *)ret_val = 1;
+	else
+		*(int *)ret_val = 0;

	return 0;
}

static int
-vdpa_mode_selected(struct rte_devargs *devargs)
+virtio_dev_devargs_parse(struct rte_devargs *devargs, int *vdpa)
{
	struct rte_kvargs *kvlist;
	const char *key = "vdpa";

@@ -1980,12 +1982,16 @@ vdpa_mode_selected(struct rte_devargs *devargs)

	if (!rte_kvargs_count(kvlist, key))
		goto exit;

-	/* vdpa mode selected when there's a key-value pair: vdpa=1 */
-	if (rte_kvargs_process(kvlist, key,
-				vdpa_check_handler, NULL) < 0) {
-		goto exit;
+	if (vdpa) {
+		/* vdpa mode selected when there's a key-value pair:
+		 * vdpa=1
+		 */
+		ret = rte_kvargs_process(kvlist, key,
+				vdpa_check_handler, vdpa);
+		if (ret  < 0)

+			goto exit;
	}
-	ret = 1;
+

exit:
	rte_kvargs_free(kvlist);

@@ -1995,8 +2001,17 @@ vdpa_mode_selected(struct rte_devargs *devargs)

static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
	struct rte_pci_device *pci_dev)
{
+	int vdpa = 0;
+	int ret = 0;
+
+	ret = virtio_dev_devargs_parse(pci_dev->device.devargs, &vdpa);
+	if (ret < 0) {
+		PMD_DRV_LOG(ERR,
+			"devargs parsing is failed");