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From: Axel Lin <axel.lin@gmail.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@ti.com>, linux-kernel@vger.kernel.org
Subject: [PATCH] regulator: wm831x-ldo: Check return value of wm831x_reg_read()
Date: Tue, 31 Jul 2012 21:28:26 +0800	[thread overview]
Message-ID: <1343741306.6773.1.camel@phoenix> (raw)

wm831x_reg_read() returns negative error code on failure.
This prevents using the error code as the value read.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
 drivers/regulator/wm831x-ldo.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c
index 5cb70ca..56a6de3 100644
--- a/drivers/regulator/wm831x-ldo.c
+++ b/drivers/regulator/wm831x-ldo.c
@@ -205,6 +205,8 @@ static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev)
 
 	/* Is it reporting under voltage? */
 	ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
+	if (ret < 0)
+		return ret;
 	if (ret & mask)
 		return REGULATOR_STATUS_ERROR;
 
@@ -469,6 +471,8 @@ static int wm831x_aldo_get_status(struct regulator_dev *rdev)
 
 	/* Is it reporting under voltage? */
 	ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS);
+	if (ret < 0)
+		return ret;
 	if (ret & mask)
 		return REGULATOR_STATUS_ERROR;
 
-- 
1.7.9.5




             reply	other threads:[~2012-07-31 13:28 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-31 13:28 Axel Lin [this message]
2012-08-01 20:02 ` [PATCH] regulator: wm831x-ldo: Check return value of wm831x_reg_read() Mark Brown

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