From: Nicolin Chen <nicoleotsuka@gmail.com>
To: jdelvare@suse.com, linux@roeck-us.net
Cc: afd@ti.com, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] hwmon: (ina3221) Clamp shunt resistor value from DT
Date: Mon, 8 Oct 2018 13:05:37 -0700 [thread overview]
Message-ID: <20181008200537.22062-1-nicoleotsuka@gmail.com> (raw)
The input->shunt_resistor is int type while the value from DT is
unsigned int. Meanwhile, a divide-by-zero error would happen if
the value is 0. So this patch just simply clamps the value.
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
drivers/hwmon/ina3221.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c
index c3a497aed345..ce8f0a8c4982 100644
--- a/drivers/hwmon/ina3221.c
+++ b/drivers/hwmon/ina3221.c
@@ -536,8 +536,10 @@ static int ina3221_probe_child_from_dt(struct device *dev,
of_property_read_string(child, "label", &input->label);
/* Overwrite default shunt resistor value optionally */
- if (!of_property_read_u32(child, "shunt-resistor-micro-ohms", &val))
+ if (!of_property_read_u32(child, "shunt-resistor-micro-ohms", &val)) {
+ val = clamp_val(val, 1, INT_MAX);
input->shunt_resistor = val;
+ }
return 0;
}
--
2.17.1
next reply other threads:[~2018-10-08 20:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-08 20:05 Nicolin Chen [this message]
2018-10-08 20:24 ` [PATCH] hwmon: (ina3221) Clamp shunt resistor value from DT Guenter Roeck
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