linux-kernel - [PATCH 6/7] regulator: core: Lock dependent regulators on regulator

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Date:   Mon, 04 Jun 2018 15:59:23 +0200
From:   Maciej Purski <m.purski@...sung.com>
To:     Mark Brown <broonie@...nel.org>, Tony Lindgren <tony@...mide.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-omap@...r.kernel.org, Carlos Hernandez <ceh@...com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Maciej Purski <m.purski@...sung.com>
Subject: [PATCH 6/7] regulator: core: Lock dependent regulators on
 regulator_enable()

Since regulator_enable() might now call regulator_balance_voltage(),
it should also lock its coupled regulators and suppliers.

Signed-off-by: Maciej Purski <m.purski@...sung.com>
---
 drivers/regulator/core.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 7c57268..2a7ffb7 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2305,9 +2305,9 @@ int regulator_enable(struct regulator *regulator)
 			return ret;
 	}
 
-	regulator_lock(rdev);
+	regulator_lock_dependent(rdev);
 	ret = _regulator_enable(rdev);
-	regulator_unlock(rdev);
+	regulator_unlock_dependent(rdev);
 
 	if (ret != 0 && rdev->supply)
 		regulator_disable(rdev->supply);
@@ -2415,9 +2415,9 @@ int regulator_disable(struct regulator *regulator)
 	if (regulator->always_on)
 		return 0;
 
-	regulator_lock(rdev);
+	regulator_lock_dependent(rdev);
 	ret = _regulator_disable(rdev);
-	regulator_unlock(rdev);
+	regulator_unlock_dependent(rdev);
 
 	if (ret == 0 && rdev->supply)
 		regulator_disable(rdev->supply);
@@ -2467,10 +2467,10 @@ int regulator_force_disable(struct regulator *regulator)
 	struct regulator_dev *rdev = regulator->rdev;
 	int ret;
 
-	regulator_lock(rdev);
+	regulator_lock_dependent(rdev);
 	regulator->uA_load = 0;
 	ret = _regulator_force_disable(regulator->rdev);
-	regulator_unlock(rdev);
+	regulator_unlock_dependent(rdev);
 
 	if (rdev->supply)
 		while (rdev->open_count--)
-- 
2.7.4