Dpdk pmd device not stopping

I am using memif devices in my project. As you know memif's are the eth devices in dpdk. When I am ending my application, I am stopping, disable promiscuous mode and closing memif eth devices. This is the sequence I fallow;

rte_eth_dev_stop(portId);
rte_eth_promiscuous_disable(portId);
rte_eth_dev_close(portId);

Eth device gives error Unknown error -95 (-95) in rte_eth_dev_stop(portId) and same error no at rte_eth_promiscuous_disable() function. Besides I get the memif_disconnect(): Failed to unregister control channel callback error. But rte_eth_dev_close() return success. I don't know what am I doing wrong ? Maybe the closing sequence could be wrong.

I would be very appreciated if you guide me about that issue. Best regards.

Solution

@Mustafa I request to spend some time in both documentation and code, which will help in easily understanding that memif does not enable or disable promiscuous mode.

Let me explain

From DPDK [NIC overview][1] Table 1.1 Features availability in networking drivers it calls out various features what is supported
For memif promsicous mode is not present.
DPDK internal library (rte_ethdev) implements promiscuous_enable and promiscuous_disable to support user requests to be transferred to underlying PMD.
In case of memif, check [code][2] code static const struct eth_dev_ops ops. The promiscuous enable|dsiable function handlers are absent.

Hence there is nothing wrong memif.

[EDIT-1] with respect to memif rte_eth_dev_stop, checking for memif_dev_stop, only the return value is return 0; hence the claim of -95 for stop device is not valid.

Note: please check the code and links to better understand the code. [1]: https://doc.dpdk.org/guides/nics/overview.html [2]: https://git.dpdk.org/dpdk/tree/drivers/net/memif/rte_eth_memif.c