From 9f8df6adf6c53abfa10e243cb289c34eb18ec581 Mon Sep 17 00:00:00 2001
From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Wed, 2 Sep 2015 16:14:06 +0530
Subject: regulator: core: fix possible NULL dereference
We were checking rdev->supply for NULL after dereferencing it. Lets
check for rdev->supply along with _regulator_is_enabled() and call
regulator_enable() only if rdev->supply is not NULL.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/regulator/core.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
(limited to 'drivers/regulator')
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index de9f272a0faf..7150ff6ef46b 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1422,11 +1422,10 @@ static int regulator_resolve_supply(struct regulator_dev *rdev)
return ret;
/* Cascade always-on state to supply */
- if (_regulator_is_enabled(rdev)) {
+ if (_regulator_is_enabled(rdev) && rdev->supply) {
ret = regulator_enable(rdev->supply);
if (ret < 0) {
- if (rdev->supply)
- _regulator_put(rdev->supply);
+ _regulator_put(rdev->supply);
return ret;
}
}
--
cgit
From 23c3f310e897837aeb8ffe8700b803cb58e7b35d Mon Sep 17 00:00:00 2001
From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Date: Thu, 17 Sep 2015 14:50:20 +0100
Subject: regulator: core: Correct return value check in
regulator_resolve_supply
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@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
---
drivers/regulator/core.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
(limited to 'drivers/regulator')
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 7150ff6ef46b..d0fbaea9bf54 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1394,15 +1394,15 @@ static int regulator_resolve_supply(struct regulator_dev *rdev)
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 {
--
cgit