diff mbox series

[6/9] rtc: ds1343: check regmap_read return value

Message ID 20191019204941.6203-6-alexandre.belloni@bootlin.com
State Accepted
Headers show
Series None | expand

Commit Message

Alexandre Belloni Oct. 19, 2019, 8:49 p.m. UTC 
Check whether regmap_read fails before continuing in the sysfs .show
callbacks.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/rtc/rtc-ds1343.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/rtc/rtc-ds1343.c b/drivers/rtc/rtc-ds1343.c
index 7532a2e8407e..c96a505972e6 100644
--- a/drivers/rtc/rtc-ds1343.c
+++ b/drivers/rtc/rtc-ds1343.c
@@ -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) {