4.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
commit 23c3f310e897837aeb8ffe8700b803cb58e7b35d upstream.
The ret pointer passed to regulator_dev_lookup is only filled with a
valid error code if regulator_dev_lookup returned NULL. Currently
regulator_resolve_supply checks this ret value before it checks if a
regulator was returned, this can result in valid regulator lookups being
ignored.
Fixes: 6261b06de565 ("regulator: Defer lookup of supply to regulator_get")
Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/regulator/core.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1376,15 +1376,15 @@ static int regulator_resolve_supply(stru
return 0;
r = regulator_dev_lookup(dev, rdev->supply_name, &ret);
- if (ret == -ENODEV) {
- /*
- * No supply was specified for this regulator and
- * there will never be one.
- */
- return 0;
- }
-
if (!r) {
+ if (ret == -ENODEV) {
+ /*
+ * No supply was specified for this regulator and
+ * there will never be one.
+ */
+ return 0;
+ }
+
if (have_full_constraints()) {
r = dummy_regulator_rdev;
} else {
--
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