regulator: Fix unbalanced disables/enables in regulator_bulk_{enable,disable} error path

Currently it is possible for regulator_bulk_{enable,disable} operations to
generate unbalanced regulator_{disable,enable} calls in its error path.
In case of an error only those regulators of the bulk operation which actually
had been enabled/disabled should get their original state restored.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 1af8df203b72..686ef270ecf7 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1977,7 +1977,7 @@ int regulator_bulk_enable(int num_consumers,
 
 err:
         printk(KERN_ERR "Failed to enable %s: %d\n", consumers[i].supply, ret);
-        for (i = 0; i < num_consumers; i++)
+        for (--i; i >= 0; --i)
                 regulator_disable(consumers[i].consumer);
 
         return ret;
@@ -2013,7 +2013,7 @@ int regulator_bulk_disable(int num_consumers,
 err:
         printk(KERN_ERR "Failed to disable %s: %d\n", consumers[i].supply,
                ret);
-        for (i = 0; i < num_consumers; i++)
+        for (--i; i >= 0; --i)
                 regulator_enable(consumers[i].consumer);
 
         return ret;