[PATCH 3/3] can: rcar_canfd: Handle Bus-Off recovery interrupt

[Biju]

From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>

Add handling for the Bus-Off recovery interrupt in the error handler.
When the channel bus-off recovery interrupt is received, transition the
CAN state back to CAN_STATE_ERROR_ACTIVE to reflect that the controller
has successfully recovered from a bus-off event.

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
 drivers/net/can/rcar/rcar_canfd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index 1d6d667b8816..427472d0fd98 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -1186,6 +1186,10 @@ static void rcar_canfd_error(struct net_device *ndev, u32 cerfl,
 		can_bus_off(ndev);
 		cf->can_id |= CAN_ERR_BUSOFF;
 	}
+	if (cerfl & RCANFD_CERFL_BORF) {
+		netdev_dbg(ndev, "Bus-Off recovery interrupt\n");
+		priv->can.state = CAN_STATE_ERROR_ACTIVE;
+	}
 	if (cerfl & RCANFD_CERFL_OVLF) {
 		netdev_dbg(ndev,
 			   "Overload Frame Transmission error interrupt\n");
-- 
2.43.0