From: Antoniu Miclaus <antoniu.miclaus@analog.com>
To: Jean Delvare <jdelvare@suse.com>,
Guenter Roeck <linux@roeck-us.net>, <linux-hwmon@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: Antoniu Miclaus <antoniu.miclaus@analog.com>
Subject: [PATCH] drivers: hwmon: ltc2992: avoid division by zero
Date: Wed, 11 Oct 2023 16:57:53 +0300 [thread overview]
Message-ID: <20231011135754.13508-1-antoniu.miclaus@analog.com> (raw)
Do not allow setting shunt resistor to 0. This results in a division by
zero when performing current value computations based on input voltages
and connected resistor values.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
drivers/hwmon/ltc2992.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/ltc2992.c b/drivers/hwmon/ltc2992.c
index 589bcd07ce7f..001799bc28ed 100644
--- a/drivers/hwmon/ltc2992.c
+++ b/drivers/hwmon/ltc2992.c
@@ -875,8 +875,12 @@ static int ltc2992_parse_dt(struct ltc2992_state *st)
}
ret = fwnode_property_read_u32(child, "shunt-resistor-micro-ohms", &val);
- if (!ret)
+ if (!ret) {
+ if (!val)
+ return dev_err_probe(&st->client->dev, -EINVAL,
+ "shunt resistor value cannot be zero\n");
st->r_sense_uohm[addr] = val;
+ }
}
return 0;
--
2.42.0
next reply other threads:[~2023-10-11 13:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-11 13:57 Antoniu Miclaus [this message]
2023-10-25 19:38 ` Guenter Roeck
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