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iio: Simplify iio_map_array_unregister API

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Instead of requiring the map to unregister, simply unregister all map entries
associated with the given iio device. This simplifies map removal and also works
for maps generated through devicetree.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Guenter Roeck
2013-01-31 21:43:00 +00:00
committed by Jonathan Cameron
parent ca7d98dbd7
commit 6cb2afd7c0
4 changed files with 18 additions and 42 deletions
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36
drivers/iio/inkern.c
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@@ -54,39 +54,25 @@ error_ret:
EXPORT_SYMBOL_GPL(iio_map_array_register);
/* Assumes the exact same array (e.g. memory locations)
* used at unregistration as used at registration rather than
* more complex checking of contents.
/*
* Remove all map entries associated with the given iio device
*/
int iio_map_array_unregister(struct iio_dev *indio_dev,
struct iio_map *maps)
int iio_map_array_unregister(struct iio_dev *indio_dev)
{
int i = 0, ret = 0;
bool found_it;
int ret = -ENODEV;
struct iio_map_internal *mapi;
if (maps == NULL)
return 0;
struct list_head *pos, *tmp;
mutex_lock(&iio_map_list_lock);
while (maps[i].consumer_dev_name != NULL) {
found_it = false;
list_for_each_entry(mapi, &iio_map_list, l)
if (&maps[i] == mapi->map) {
list_del(&mapi->l);
kfree(mapi);
found_it = true;
break;
}
if (!found_it) {
ret = -ENODEV;
goto error_ret;
list_for_each_safe(pos, tmp, &iio_map_list) {
mapi = list_entry(pos, struct iio_map_internal, l);
if (indio_dev == mapi->indio_dev) {
list_del(&mapi->l);
kfree(mapi);
ret = 0;
}
i++;
}
error_ret:
mutex_unlock(&iio_map_list_lock);
return ret;
}
EXPORT_SYMBOL_GPL(iio_map_array_unregister);