linux-kernel - [PATCH] regulator: Remove NULL test before calling regulator

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Date:	Sat, 27 Apr 2013 13:58:08 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mark Brown <broonie@...nel.org>
Cc:	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Wolfram Sang <w.sang@...gutronix.de>,
	Sangbeom Kim <sbkim73@...sung.com>,
	Cyril Chemparathy <cyril@...com>,
	Liam Girdwood <lgirdwood@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] regulator: Remove NULL test before calling
 regulator_unregister()

It's safe to call regulator_unregister() with NULL, thus remove the NULL test
before regulator_unregister() calls.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
Cc: Robert Jarzmik <robert.jarzmik@...e.fr>
Cc: Haojian Zhuang <haojian.zhuang@...il.com>
Cc: Wolfram Sang <w.sang@...gutronix.de>
Cc: Sangbeom Kim <sbkim73@...sung.com>
Cc: Cyril Chemparathy <cyril@...com>
---
 drivers/regulator/max1586.c            |    3 +--
 drivers/regulator/max8649.c            |    6 ++----
 drivers/regulator/max8660.c            |    3 +--
 drivers/regulator/s5m8767.c            |    6 ++----
 drivers/regulator/tps6524x-regulator.c |    3 +--
 5 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c
index dac0490..54af610 100644
--- a/drivers/regulator/max1586.c
+++ b/drivers/regulator/max1586.c
@@ -232,8 +232,7 @@ static int max1586_pmic_remove(struct i2c_client *client)
 	int i;
 
 	for (i = 0; i <= MAX1586_V6; i++)
-		if (max1586->rdev[i])
-			regulator_unregister(max1586->rdev[i]);
+		regulator_unregister(max1586->rdev[i]);
 	return 0;
 }
 
diff --git a/drivers/regulator/max8649.c b/drivers/regulator/max8649.c
index fdb67ff..db6c9be 100644
--- a/drivers/regulator/max8649.c
+++ b/drivers/regulator/max8649.c
@@ -248,10 +248,8 @@ static int max8649_regulator_remove(struct i2c_client *client)
 {
 	struct max8649_regulator_info *info = i2c_get_clientdata(client);
 
-	if (info) {
-		if (info->regulator)
-			regulator_unregister(info->regulator);
-	}
+	if (info)
+		regulator_unregister(info->regulator);
 
 	return 0;
 }
diff --git a/drivers/regulator/max8660.c b/drivers/regulator/max8660.c
index 4d7c635..d428ef9 100644
--- a/drivers/regulator/max8660.c
+++ b/drivers/regulator/max8660.c
@@ -426,8 +426,7 @@ static int max8660_remove(struct i2c_client *client)
 	int i;
 
 	for (i = 0; i < MAX8660_V_END; i++)
-		if (max8660->rdev[i])
-			regulator_unregister(max8660->rdev[i]);
+		regulator_unregister(max8660->rdev[i]);
 	return 0;
 }
 
diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 8e56198..c24448b 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -923,8 +923,7 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 	return 0;
 err:
 	for (i = 0; i < s5m8767->num_regulators; i++)
-		if (rdev[i])
-			regulator_unregister(rdev[i]);
+		regulator_unregister(rdev[i]);
 
 	return ret;
 }
@@ -936,8 +935,7 @@ static int s5m8767_pmic_remove(struct platform_device *pdev)
 	int i;
 
 	for (i = 0; i < s5m8767->num_regulators; i++)
-		if (rdev[i])
-			regulator_unregister(rdev[i]);
+		regulator_unregister(rdev[i]);
 
 	return 0;
 }
diff --git a/drivers/regulator/tps6524x-regulator.c b/drivers/regulator/tps6524x-regulator.c
index 18b67d2..1094393 100644
--- a/drivers/regulator/tps6524x-regulator.c
+++ b/drivers/regulator/tps6524x-regulator.c
@@ -585,8 +585,7 @@ static int pmic_remove(struct spi_device *spi)
 	if (!hw)
 		return 0;
 	for (i = 0; i < N_REGULATORS; i++) {
-		if (hw->rdev[i])
-			regulator_unregister(hw->rdev[i]);
+		regulator_unregister(hw->rdev[i]);
 		hw->rdev[i] = NULL;
 	}
 	spi_set_drvdata(spi, NULL);
-- 
1.7.10.4



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