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Subject[PATCH] regulator: catch some registration errors
From: David Brownell <dbrownell@users.sourceforge.net>

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>
---
drivers/regulator/core.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 895f738..fcac9e5 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -775,6 +775,20 @@ 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;
--
1.5.6.3


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