From: Alexandr Sapozhnikov <alsp705@gmail.com>
The regmap_raw_read() function may return an error.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Alexandr Sapozhnikov <alsp705@gmail.com>
---
drivers/rtc/rtc-88pm80x.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c
index f40cc06b0979..50266d2e078a 100644
--- a/drivers/rtc/rtc-88pm80x.c
+++ b/drivers/rtc/rtc-88pm80x.c
@@ -119,6 +119,7 @@ static int pm80x_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int pm80x_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
+ int ret;
struct pm80x_rtc_info *info = dev_get_drvdata(dev);
unsigned char buf[4];
unsigned long ticks, base, data;
@@ -126,7 +127,9 @@ static int pm80x_rtc_set_time(struct device *dev, struct rtc_time *tm)
ticks = rtc_tm_to_time64(tm);
/* load 32-bit read-only counter */
- regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
+ ret = regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
+ if (ret)
+ return ret;
data = ((unsigned long)buf[3] << 24) | (buf[2] << 16) |
(buf[1] << 8) | buf[0];
base = ticks - data;
--
2.43.0