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.shtyl...@cogentembedded.com>

---
 drivers/net/can/rcar_can.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-can/drivers/net/can/rcar_can.c
===================================================================
--- linux-can.orig/drivers/net/can/rcar_can.c
+++ linux-can/drivers/net/can/rcar_can.c
@@ -527,7 +527,8 @@ static int rcar_can_open(struct net_devi
        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);

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