Re: [dpdk-dev] [PATCH v4 1/4] net/virtio: refactor devargs parsing

[Ye Xiaolong <xiaolong.ye@intel.com>]

On 02/25, Ivan Dyukov wrote:
>refactor vdpa specific devargs parsing to more generic way
>
>Signed-off-by: Ivan Dyukov <i.dyukov@samsung.com>
>---
> 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)

Double space between 'ret' and '<'.

>+			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");

I think PMD_INIG_LOG should be used, and there is no need to split into 2 lines
as it won't exceed 80 chars.

Thanks,
Xiaolong

>+		return ret;
>+	}
> 	/* virtio pmd skips probe if device needs to work in vdpa mode */
>-	if (vdpa_mode_selected(pci_dev->device.devargs))
>+	if (vdpa == 1)
> 		return 1;
> 
> 	return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
>-- 
>2.17.1
>