Hi all,
I've added a success / fail message to comedi autoconfig. That's badly
needed to see which driver has been associated with which comedi dev in
udev. Also, as far as I know an error in the USB probe callback won't
cause the kernel to print any errors so tracking down failures in
autoconfig would be really tricky.
/Bernd
--
http://www.berndporr.me.uk
http://www.linux-usb-daq.co.uk
http://www.imdb.com/name/nm3293421/
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>From e516c966fb36a9a8fee3e743ec97d4732cd9285c Mon Sep 17 00:00:00 2001
From: Bernd Porr <m...@berndporr.me.uk>
Date: Sat, 21 Dec 2013 09:52:11 +0000
Subject: [PATCH 1/1] 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 <m...@berndporr.me.uk>
---
drivers/staging/comedi/comedi_fops.c | 1 +
drivers/staging/comedi/drivers.c | 17 +++++++++++++++--
2 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index 33b4e58..4e53c5d 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -2523,6 +2523,7 @@ struct comedi_device *comedi_alloc_board_minor(struct device *hardware_device)
return ERR_PTR(-EBUSY);
}
dev->minor = i;
+
csdev = device_create(comedi_class, hardware_device,
MKDEV(COMEDI_MAJOR, i), NULL, "comedi%i", i);
if (!IS_ERR(csdev))
diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
index 29b3480..f9be097 100644
--- a/drivers/staging/comedi/drivers.c
+++ b/drivers/staging/comedi/drivers.c
@@ -585,8 +585,12 @@ 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;
@@ -598,8 +602,17 @@ 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);
--
1.8.5.1
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