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rtc: ds1343: check regmap_read return value 

Check whether regmap_read fails before continuing in the sysfs .show
callbacks.

Link: https://lore.kernel.org/r/20191019204941.6203-6-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2019-10-19 22:49:38 +02:00
parent ac08888b25
commit ce0fd9db65
1 changed files with 8 additions and 3 deletions
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11
drivers/rtc/rtc-ds1343.c
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@ -92,8 +92,11 @@ static ssize_t ds1343_show_glitchfilter(struct device *dev,
{
struct ds1343_priv *priv = dev_get_drvdata(dev->parent);
int glitch_filt_status, data;
int res;
regmap_read(priv->map, DS1343_CONTROL_REG, &data);
res = regmap_read(priv->map, DS1343_CONTROL_REG, &data);
if (res)
return res;
glitch_filt_status = !!(data & DS1343_EGFIL);
@ -147,10 +150,12 @@ static ssize_t ds1343_show_tricklecharger(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ds1343_priv *priv = dev_get_drvdata(dev->parent);
int data;
int res, data;
char *diodes = "disabled", *resistors = " ";
regmap_read(priv->map, DS1343_TRICKLE_REG, &data);
res = regmap_read(priv->map, DS1343_TRICKLE_REG, &data);
if (res)
return res;
if ((data & 0xf0) == DS1343_TRICKLE_MAGIC) {
switch (data & 0x0c) {