can: flexcan: handle tx-complete CAN frames via rx-offload infrastructure

Current flexcan driver will put TX-ECHO in regular unsorted way, in
this case TX-ECHO can come after the response to the same TXed message.
In some cases, for example for J1939 stack, things will break.
This patch is using new rx-offload API to put the messages just in the
right place.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 68b4639..41a175f 100644 (file)
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -787,8 +787,11 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
 
        /* transmission complete interrupt */
        if (reg_iflag2 & FLEXCAN_IFLAG_MB(FLEXCAN_TX_MB)) {
+               u32 reg_ctrl = priv->read(&regs->mb[FLEXCAN_TX_MB].can_ctrl);
+
                handled = IRQ_HANDLED;
-               stats->tx_bytes += can_get_echo_skb(dev, 0);
+               stats->tx_bytes += can_rx_offload_get_echo_skb(&priv->offload,
+                                                              0, reg_ctrl << 16);
                stats->tx_packets++;
                can_led_event(dev, CAN_LED_EVENT_TX);