Commit eddf6711 authored by Dario Binacchi's avatar Dario Binacchi Committed by Marc Kleine-Budde
Browse files

can: c_can: add a comment about IF_RX interface's use 

After reading the commit 640916db ("can: c_can: Make it SMP safe")
it may sound strange to see the IF_RX interface used by the
can_inval_tx_object function. A comment was added to avoid any
misunderstanding.

Link: https://lore.kernel.org/r/20210302215435.18286-4-dariobin@libero.it


Signed-off-by: default avatarDario Binacchi <dariobin@libero.it>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent c8a6b443

drivers/net/can/c_can/c_can.c

+5 −0
Original line number Diff line number Diff line
@@ -710,6 +710,11 @@ static void c_can_do_tx(struct net_device *dev) 
		idx--;

		pend &= ~(1 << idx);

		obj = idx + C_CAN_MSG_OBJ_TX_FIRST;



		/* We use IF_RX interface instead of IF_TX because we

		 * are called from c_can_poll(), which runs inside

		 * NAPI. We are not trasmitting.

		 */

		c_can_inval_tx_object(dev, IF_RX, obj);

		can_get_echo_skb(dev, idx, NULL);

		bytes += priv->dlc[idx];