[PATCH] can: mcp251x: add some messages to mcp251x_can_probe()

[Ed Spiridonov <edo.rus@gmail.com>]

Print error message if mcp251x_hw_probe() fails (e.g. MCP2515 isn't connected or other wiring issue).
Print information message if mcp251x_can_probe() is successful.
---
 drivers/net/can/spi/mcp251x.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c
index cf36d26..49453f7 100644
--- a/drivers/net/can/spi/mcp251x.c
+++ b/drivers/net/can/spi/mcp251x.c
@@ -1145,8 +1145,10 @@ static int mcp251x_can_probe(struct spi_device *spi)
 
 	/* Here is OK to not lock the MCP, no one knows about it yet */
 	ret = mcp251x_hw_probe(spi);
-	if (ret)
+	if (ret) {
+		dev_err(&spi->dev, "hw_probe failed, err=%d (wrong wiring?)\n", -ret);
 		goto error_probe;
+	}
 
 	mcp251x_hw_sleep(spi);
 
@@ -1156,6 +1158,8 @@ static int mcp251x_can_probe(struct spi_device *spi)
 
 	devm_can_led_init(net);
 
+	netdev_info(net, "successfully initialized.\n");
+
 	return 0;
 
 error_probe:
-- 
2.7.0