linux-kernel - [PATCH] regmap: fix _regmap_update

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Date:	Thu, 23 Jan 2014 17:50:24 +0800
From:	Xiubo Li <Li.Xiubo@...escale.com>
To:	<broonie@...nel.org>, <gregkh@...uxfoundation.org>
CC:	<linux-kernel@...r.kernel.org>, Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCH] regmap: fix _regmap_update_bits()

Since sometimes the 'config' parameter is no use, it should be NULL.

Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
---
 drivers/base/regmap/regmap.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c2e0021..737b874 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1958,9 +1958,11 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 
 	if (tmp != orig) {
 		ret = _regmap_write(map, reg, tmp);
-		*change = true;
+		if (change)
+			*change = true;
 	} else {
-		*change = false;
+		if (change)
+			*change = false;
 	}
 
 	return ret;
@@ -1979,11 +1981,10 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
 int regmap_update_bits(struct regmap *map, unsigned int reg,
 		       unsigned int mask, unsigned int val)
 {
-	bool change;
 	int ret;
 
 	map->lock(map->lock_arg);
-	ret = _regmap_update_bits(map, reg, mask, val, &change);
+	ret = _regmap_update_bits(map, reg, mask, val, NULL);
 	map->unlock(map->lock_arg);
 
 	return ret;
@@ -2008,14 +2009,13 @@ EXPORT_SYMBOL_GPL(regmap_update_bits);
 int regmap_update_bits_async(struct regmap *map, unsigned int reg,
 			     unsigned int mask, unsigned int val)
 {
-	bool change;
 	int ret;
 
 	map->lock(map->lock_arg);
 
 	map->async = true;
 
-	ret = _regmap_update_bits(map, reg, mask, val, &change);
+	ret = _regmap_update_bits(map, reg, mask, val, NULL);
 
 	map->async = false;
 
-- 
1.8.4


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