linux-kernel - [RFT][PATCH 2/3] regulator: ab8500-ext: Don't update info->update_val if set

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Message-ID: <1365598520.24689.2.camel@phoenix>
Date:	Wed, 10 Apr 2013 20:55:20 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Bengt Jonsson <bengt.g.jonsson@...ricsson.com>,
	Lee Jones <lee.jones@...aro.org>,
	Yvan FILLION <yvan.fillion@...ricsson.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [RFT][PATCH 2/3] regulator: ab8500-ext: Don't update
 info->update_val if set_mode() fails

This ensures info->update_val status is still correct if set_mode() call fails.
Otherwise, get_mode() may return wrong status if a set_mode() call fails.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/regulator/ab8500-ext.c |   19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c
index f0a1bbf..1efe702 100644
--- a/drivers/regulator/ab8500-ext.c
+++ b/drivers/regulator/ab8500-ext.c
@@ -181,6 +181,7 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
 {
 	int ret = 0;
 	struct ab8500_ext_regulator_info *info = rdev_get_drvdata(rdev);
+	u8 regval;
 
 	if (info == NULL) {
 		dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
@@ -189,14 +190,14 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
 
 	switch (mode) {
 	case REGULATOR_MODE_NORMAL:
-		info->update_val = info->update_val_hp;
+		regval = info->update_val_hp;
 		break;
 	case REGULATOR_MODE_IDLE:
 		/* Always on with high power mode if info->cfg->hwreq is set */
 		if (info->cfg && info->cfg->hwreq)
 			return -EINVAL;
 
-		info->update_val = info->update_val_lp;
+		regval = info->update_val_lp;
 		break;
 
 	default:
@@ -204,12 +205,14 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
 	}
 
 	if (ab8500_ext_regulator_is_enabled(rdev)) {
-		u8 regval;
-
-		ret = enable(info, &regval);
-		if (ret < 0)
+		ret = abx500_mask_and_set_register_interruptible(info->dev,
+					info->update_bank, info->update_reg,
+					info->update_mask, regval);
+		if (ret < 0) {
 			dev_err(rdev_get_dev(rdev),
 				"Could not set regulator mode.\n");
+			return ret;
+		}
 
 		dev_dbg(rdev_get_dev(rdev),
 			"%s-set_mode (bank, reg, mask, value): "
@@ -218,7 +221,9 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
 			info->update_mask, regval);
 	}
 
-	return ret;
+	info->update_val = regval;
+
+	return 0;
 }
 
 static unsigned int ab8500_ext_regulator_get_mode(struct regulator_dev *rdev)
-- 
1.7.10.4



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