On Fri May 2, 2025 at 4:13 PM CEST, Marc Kleine-Budde wrote:
> If a driver is removed, the driver framework invokes the driver's
> remove callback. A CAN driver's remove function calls
> unregister_candev(), which calls net_device_ops::ndo_stop further down
> in the call stack for interfaces which are in the "up" state.
>
> The removal of the module causes the a warning, as
^^^
Minor typo here.
Otherwise this looks good to me.
Reviewed-by: Markus Schneider-Pargmann
> can_rx_offload_del() deletes the NAPI, while it is still active,
> because the interface is still up.
>
> To fix the warning, first unregister the network interface, which
> calls net_device_ops::ndo_stop, which disables the NAPI, and then call
> can_rx_offload_del().
>
> Fixes: ff60bfbaf67f ("can: rockchip_canfd: add driver for Rockchip CAN-FD controller")
> Cc: stable@vger.kernel.org
> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
> ---
> drivers/net/can/rockchip/rockchip_canfd-core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/can/rockchip/rockchip_canfd-core.c b/drivers/net/can/rockchip/rockchip_canfd-core.c
> index 7107a37da36c..c3fb3176ce42 100644
> --- a/drivers/net/can/rockchip/rockchip_canfd-core.c
> +++ b/drivers/net/can/rockchip/rockchip_canfd-core.c
> @@ -937,8 +937,8 @@ static void rkcanfd_remove(struct platform_device *pdev)
> struct rkcanfd_priv *priv = platform_get_drvdata(pdev);
> struct net_device *ndev = priv->ndev;
>
> - can_rx_offload_del(&priv->offload);
> rkcanfd_unregister(priv);
> + can_rx_offload_del(&priv->offload);
> free_candev(ndev);
> }
>