[PATCH] hwmon: (pwm-fan) Add missing check for device_property_read_u32_array

[Chen Ni]

Add check for the return value of device_property_read_u32_array() and
return the error if it fails in order to catch the error.

Signed-off-by: Chen Ni <nichen@xxxxxxxxxxx>
---
 drivers/hwmon/pwm-fan.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index 37269db2de84..3535007f5c37 100644
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -609,8 +609,11 @@ static int pwm_fan_probe(struct platform_device *pdev)
 		for (i = 0; i < ctx->tach_count; i++)
 			ctx->pulses_per_revolution[i] = 2;
 
-		device_property_read_u32_array(dev, "pulses-per-revolution",
-					       ctx->pulses_per_revolution, ctx->tach_count);
+		ret = device_property_read_u32_array(dev, "pulses-per-revolution",
+						     ctx->pulses_per_revolution, ctx->tach_count);
+		if (ret)
+			return dev_err_probe(dev, ret,
+					     "Failed to read pulses-per-revolution\n");
 	}
 
 	channels = devm_kcalloc(dev, channel_count + 1,
-- 
2.25.1