[dpdk-dev] [PATCH] ethdev: fix memory leak on removing eth rxtx callback

[Ferruh Yigit]

On 11/21/2018 1:11 PM, wanlebing wrote:
> eth rxtx callback is dynamically allocated using rte_zmalloc()
> but not released. Fix it by calling rte_free() to free callback
> when removing rxtx callback.

I guess they are not freed intentionally because there is no safe way to do it.
I remember Konstantin sent an RFC in the past to rework the callbacks, cc'ed him
for more details.

> 
> Signed-off-by: wanlebing <wanlebing at didichuxing.com>
> Signed-off-by: wanlebing <wanlebing at gmail.com>
> ---
>  lib/librte_ethdev/rte_ethdev.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index 5f858174b..f00311047 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -3926,6 +3926,7 @@ rte_eth_remove_rx_callback(uint16_t port_id, uint16_t queue_id,
>  		if (cb == user_cb) {
>  			/* Remove the user cb from the callback list. */
>  			*prev_cb = cb->next;
> +			rte_free(cb);
>  			ret = 0;
>  			break;
>  		}
> @@ -3960,6 +3961,7 @@ rte_eth_remove_tx_callback(uint16_t port_id, uint16_t queue_id,
>  		if (cb == user_cb) {
>  			/* Remove the user cb from the callback list. */
>  			*prev_cb = cb->next;
> +			rte_free(cb);
>  			ret = 0;
>  			break;
>  		}
>