[PATCH 1/3] rtc: ds1685: fix crash caused by referencing wrong device struct

Thomas Bogendoerfer
2019-04-11T14:33:46Z

sysfs entries added by rtc_add_group are called with the rtc device
as argument and not the underlying device. Fixed by using the dev->parent

Fixes: cfb74916e2ec ("rtc: ds1685: use rtc_add_group")
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/rtc/rtc-ds1685.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-ds1685.c b/drivers/rtc/rtc-ds1685.c
index 2710f2594c42..2f5194df239e 100644
--- a/drivers/rtc/rtc-ds1685.c
+++ b/drivers/rtc/rtc-ds1685.c
@@ -1004,7 +1004,7 @@ static ssize_t
ds1685_rtc_sysfs_battery_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct ds1685_priv *rtc = dev_get_drvdata(dev);
+ struct ds1685_priv *rtc = dev_get_drvdata(dev->parent);
u8 ctrld;

ctrld = rtc->read(rtc, RTC_CTRL_D);
@@ -1024,7 +1024,7 @@ static ssize_t
ds1685_rtc_sysfs_auxbatt_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct ds1685_priv *rtc = dev_get_drvdata(dev);
+ struct ds1685_priv *rtc = dev_get_drvdata(dev->parent);
u8 ctrl4a;

ds1685_rtc_switch_to_bank1(rtc);
@@ -1046,7 +1046,7 @@ static ssize_t
ds1685_rtc_sysfs_serial_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct ds1685_priv *rtc = dev_get_drvdata(dev);
+ struct ds1685_priv *rtc = dev_get_drvdata(dev->parent);
u8 ssn[8];

ds1685_rtc_switch_to_bank1(rtc);
--
2.13.7