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regulator: catch some registration errors

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Prevent registration of duplicate "struct regulator" names.
They'd be unavailable, and clearly indicate something wrong.

[Edited to remove check for NULL consumer device until we have a
solution for things like cpufreq -- broonie]

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
David Brownell 2008-12-31 12:54:19 +00:00 committed by Liam Girdwood
parent 9fe5817f19
commit 6001e13c5f
1 changed files with 14 additions and 0 deletions
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14
drivers/regulator/core.c
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@ -776,6 +776,20 @@ static int set_consumer_device_supply(struct regulator_dev *rdev,
if (supply == NULL)
return -EINVAL;
list_for_each_entry(node, &regulator_map_list, list) {
if (consumer_dev != node->dev)
continue;
if (strcmp(node->supply, supply) != 0)
continue;
dev_dbg(consumer_dev, "%s/%s is '%s' supply; fail %s/%s\n",
dev_name(&node->regulator->dev),
node->regulator->desc->name,
supply,
dev_name(&rdev->dev), rdev->desc->name);
return -EBUSY;
}
node = kmalloc(sizeof(struct regulator_map), GFP_KERNEL);
if (node == NULL)
return -ENOMEM;