[PATCH 2/2] staging: comedi: report success/failure of autoconfig

[Bernd Porr]

Added success message to the driver autoconfig and error
message in case it fails. A success message is required
so that the user can find out which comedi driver has been
associated with which udev device. This also makes troubleshooting
much easier when more than one card is in the computer or a
mix of USB and PCI devices.

Signed-off-by: Bernd Porr <mail at berndporr.me.uk>
---
 drivers/staging/comedi/drivers.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index d6dc58a..58c7f23 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -580,8 +580,12 @@ int comedi_auto_config(struct device *hardware_device,
 	}
 
 	dev = comedi_alloc_board_minor(hardware_device);
-	if (IS_ERR(dev))
+	if (IS_ERR(dev)) {
+		dev_warn(hardware_device,
+			 "comedi driver '%s' could not create device.\n",
+			 driver->driver_name);
 		return PTR_ERR(dev);
+	}
 	/* Note: comedi_alloc_board_minor() locked dev->mutex. */
 
 	dev->driver = driver;
@@ -593,8 +597,17 @@ int comedi_auto_config(struct device *hardware_device,
 		comedi_device_detach(dev);
 	mutex_unlock(&dev->mutex);
 
-	if (ret < 0)
+	if (ret < 0) {
+		dev_warn(hardware_device,
+			 "comedi driver '%s' could not be auto-configured.\n",
+			 driver->driver_name);
 		comedi_release_hardware_device(hardware_device);
+	} else {
+		/* class_dev should be set properly here after a successul auto config*/
+		dev_info(dev->class_dev,
+			 "'%s' has been successfully auto-configured.\n",
+			 driver->driver_name);
+	}
 	return ret;
 }
 EXPORT_SYMBOL_GPL(comedi_auto_config);
-- 
1.8.5.2