linux-kernel - [PATCH 3.13 29/46] regulator: core: Replace direct ops->disable usage

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Message-Id: <20140328173138.614802884@linuxfoundation.org>
Date:	Fri, 28 Mar 2014 10:32:13 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Markus Pargmann <mpa@...gutronix.de>,
	Mark Brown <broonie@...aro.org>
Subject: [PATCH 3.13 29/46] regulator: core: Replace direct ops->disable usage

3.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Markus Pargmann <mpa@...gutronix.de>

commit 66fda75f47dc583f1c187556e9a2c082dd64f8c6 upstream.

There are many places where ops->disable is called directly. Instead we
should use _regulator_do_disable() which also handles gpio regulators.

To be able to use the wrapper function from _regulator_force_disable(),
I moved the _notifier_call_chain() call from _regulator_do_disable() to
_regulator_disable(). This way, _regulator_force_disable() can use
different flags for _notifier_call_chain() without calling it twice.

Signed-off-by: Markus Pargmann <mpa@...gutronix.de>
Signed-off-by: Mark Brown <broonie@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/regulator/core.c |   34 +++++++++++++---------------------
 1 file changed, 13 insertions(+), 21 deletions(-)

--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1908,8 +1908,6 @@ static int _regulator_do_disable(struct
 
 	trace_regulator_disable_complete(rdev_get_name(rdev));
 
-	_notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
-			     NULL);
 	return 0;
 }
 
@@ -1933,6 +1931,8 @@ static int _regulator_disable(struct reg
 				rdev_err(rdev, "failed to disable\n");
 				return ret;
 			}
+			_notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE,
+					NULL);
 		}
 
 		rdev->use_count = 0;
@@ -1985,20 +1985,16 @@ static int _regulator_force_disable(stru
 {
 	int ret = 0;
 
-	/* force disable */
-	if (rdev->desc->ops->disable) {
-		/* ah well, who wants to live forever... */
-		ret = rdev->desc->ops->disable(rdev);
-		if (ret < 0) {
-			rdev_err(rdev, "failed to force disable\n");
-			return ret;
-		}
-		/* notify other consumers that power has been forced off */
-		_notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
-			REGULATOR_EVENT_DISABLE, NULL);
+	ret = _regulator_do_disable(rdev);
+	if (ret < 0) {
+		rdev_err(rdev, "failed to force disable\n");
+		return ret;
 	}
 
-	return ret;
+	_notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE |
+			REGULATOR_EVENT_DISABLE, NULL);
+
+	return 0;
 }
 
 /**
@@ -3631,8 +3627,6 @@ int regulator_suspend_finish(void)
 
 	mutex_lock(&regulator_list_mutex);
 	list_for_each_entry(rdev, &regulator_list, list) {
-		struct regulator_ops *ops = rdev->desc->ops;
-
 		mutex_lock(&rdev->mutex);
 		if (rdev->use_count > 0  || rdev->constraints->always_on) {
 			error = _regulator_do_enable(rdev);
@@ -3641,12 +3635,10 @@ int regulator_suspend_finish(void)
 		} else {
 			if (!have_full_constraints())
 				goto unlock;
-			if (!ops->disable)
-				goto unlock;
 			if (!_regulator_is_enabled(rdev))
 				goto unlock;
 
-			error = ops->disable(rdev);
+			error = _regulator_do_disable(rdev);
 			if (error)
 				ret = error;
 		}
@@ -3820,7 +3812,7 @@ static int __init regulator_init_complet
 		ops = rdev->desc->ops;
 		c = rdev->constraints;
 
-		if (!ops->disable || (c && c->always_on))
+		if (c && c->always_on)
 			continue;
 
 		mutex_lock(&rdev->mutex);
@@ -3841,7 +3833,7 @@ static int __init regulator_init_complet
 			/* We log since this may kill the system if it
 			 * goes wrong. */
 			rdev_info(rdev, "disabling\n");
-			ret = ops->disable(rdev);
+			ret = _regulator_do_disable(rdev);
 			if (ret != 0) {
 				rdev_err(rdev, "couldn't disable: %d\n", ret);
 			}


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