can: rcar_can: print request_irq() error code

Also print the error code when the request_irq() call fails in rcar_can_open(),
rewording  the error message...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/rcar_can.c b/drivers/net/can/rcar_can.c
index 310a0cd..5e81aff 100644 (file)
--- a/drivers/net/can/rcar_can.c
+++ b/drivers/net/can/rcar_can.c
@@ -527,7 +527,8 @@ static int rcar_can_open(struct net_device *ndev)
        napi_enable(&priv->napi);
        err = request_irq(ndev->irq, rcar_can_interrupt, 0, ndev->name, ndev);
        if (err) {
-               netdev_err(ndev, "error requesting interrupt %d\n", ndev->irq);
+               netdev_err(ndev, "request_irq(%d) failed, error %d\n",
+                          ndev->irq, err);
                goto out_close;
        }
        can_led_event(ndev, CAN_LED_EVENT_OPEN);