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staging:iio:triggers. Add a reference get to the core for triggers.

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This is to do with dynamically allocated triggers and the need to ensure
the underlying structures don't go away when a consumer is using them.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron 2011-08-24 17:28:33 +01:00 committed by Greg Kroah-Hartman
parent 6f4ebab568
commit 5f9c035cae
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/iio/industrialio-trigger.c
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@ -8,7 +8,6 @@
*/ */
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/module.h>
#include <linux/idr.h> #include <linux/idr.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/device.h> #include <linux/device.h>
@ -478,6 +477,7 @@ struct iio_trigger *iio_allocate_trigger(const char *fmt, ...)
IRQ_NOPROBE); IRQ_NOPROBE);
} }
iio_get(); iio_get();
get_device(&trig->dev);
} }
return trig; return trig;
} }
@ -501,6 +501,9 @@ EXPORT_SYMBOL(iio_device_register_trigger_consumer);
int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info) int iio_device_unregister_trigger_consumer(struct iio_dev *dev_info)
{ {
/* Clean up and associated but not attached triggers references */
if (dev_info->trig)
iio_put_trigger(dev_info->trig);
sysfs_remove_group(&dev_info->dev.kobj, sysfs_remove_group(&dev_info->dev.kobj,
&iio_trigger_consumer_attr_group); &iio_trigger_consumer_attr_group);
return 0; return 0;