[Letux-kernel] Applied "regulator: core: Fix error return for /sys access" to the regulator tree
broonie at kernel.org
Wed Sep 11 16:59:46 CEST 2019
regulator: core: Fix error return for /sys access
has been applied to the regulator tree at
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>From c82f27df07573ec7b124efe176d2ac6c038787a5 Mon Sep 17 00:00:00 2001
From: "H. Nikolaus Schaller" <hns at goldelico.com>
Date: Tue, 10 Sep 2019 21:22:29 +0200
Subject: [PATCH] regulator: core: Fix error return for /sys access
Content-Type: text/plain; charset=UTF-8
regulator_uV_show() is missing error handling if regulator_get_voltage_rdev()
returns negative values. Instead it prints the errno as a string, e.g. -EINVAL
as "-22" which could be interpreted as -22 ÂµV.
We also do not need to hold the lock while converting the integer to a string.
Reported-by: Adam Ford <aford173 at gmail.com>
Signed-off-by: H. Nikolaus Schaller <hns at goldelico.com>
Tested-by: Adam Ford <aford173 at gmail.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
drivers/regulator/core.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 340db986b67f..afe94470b67f 100644
@@ -568,13 +568,15 @@ static ssize_t regulator_uV_show(struct device *dev,
struct device_attribute *attr, char *buf)
struct regulator_dev *rdev = dev_get_drvdata(dev);
- ssize_t ret;
+ int uV;
- ret = sprintf(buf, "%d\n", regulator_get_voltage_rdev(rdev));
+ uV = regulator_get_voltage_rdev(rdev);
- return ret;
+ if (uV < 0)
+ return uV;
+ return sprintf(buf, "%d\n", uV);
static DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL);
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