[PATCH v5 2/9] rtc: abx80x: fix error check after i2c_smbus_read in read_alarm()

[Antoni Pokusinski <apokusinski01@gmail.com>]

i2c_smbus_read_i2c_block_data() returns the number of bytes read on
success and a negative error code on failure. The existing code treated
any non-zero return value as an error.

Fix the error handling by checking only for negative return values.

Fixes: 718a820a303c ("rtc: abx80x: add alarm support")
Signed-off-by: Antoni Pokusinski <apokusinski01@gmail.com>
---
 drivers/rtc/rtc-abx80x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c
index 5486d9d0b1e5..fdf9664ebb6f 100644
--- a/drivers/rtc/rtc-abx80x.c
+++ b/drivers/rtc/rtc-abx80x.c
@@ -294,7 +294,7 @@ static int abx80x_read_alarm(struct device *dev, struct rtc_wkalrm *t)
 
 	err = i2c_smbus_read_i2c_block_data(client, ABX8XX_REG_ASC,
 					    sizeof(buf), buf);
-	if (err)
+	if (err < 0)
 		return err;
 
 	irq_mask = i2c_smbus_read_byte_data(client, ABX8XX_REG_IRQ);
-- 
2.55.0