Jeroen Hofstee <jhofstee@xxxxxxxxxxxxxxxxx> writes:
> When closing this CAN interface while napi poll is active, for example with:
> `ip link set can0 down` several interfaces freeze. This seemed to be caused
> by napi_disable called from ti_hecc_close expecting the scheduled probe to
> either return quota or call napi_complete. Since the poll functions has a
> check for netif_running it returns 0 and doesn't call napi_complete and hence
> violates the napi its expectation.
>
> So remove this check, so either napi_complete is called or quota is returned.
>
> Signed-off-by: Jeroen Hofstee <jhofstee@xxxxxxxxxxxxxxxxx>
> ---
> drivers/net/can/ti_hecc.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
> index db6ea93..42813d3 100644
> --- a/drivers/net/can/ti_hecc.c
> +++ b/drivers/net/can/ti_hecc.c
> @@ -603,9 +603,6 @@ static int ti_hecc_rx_poll(struct napi_struct *napi, int quota)
> u32 mbx_mask;
> unsigned long pending_pkts, flags;
>
> - if (!netif_running(ndev))
> - return 0;
> -
> while ((pending_pkts = hecc_read(priv, HECC_CANRMP)) &&
> num_pkts < quota) {
> mbx_mask = BIT(priv->rx_next); /* next rx mailbox to process */
> --
> 2.7.4
This seems to have been lost or forgotten.
--
Måns Rullgård
