From: Cosmo Chou Date: Mon, 19 Aug 2024 10:46:30 +0000 (+0800) Subject: hwmon: (pt5161l) Fix invalid temperature reading X-Git-Tag: v6.11-rc6~23^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7bbc079531fc38d401e1c4088d4981435a8828e3;p=thirdparty%2Fkernel%2Flinux.git hwmon: (pt5161l) Fix invalid temperature reading The temperature reading function was using a signed long for the ADC code, which could lead to mishandling of invalid codes on 32-bit platforms. This allowed out-of-range ADC codes to be incorrectly interpreted as valid values and used in temperature calculations. Change adc_code to u32 to ensure that invalid ADC codes are correctly identified on all platforms. Fixes: 1b2ca93cd059 ("hwmon: Add driver for Astera Labs PT5161L retimer") Signed-off-by: Cosmo Chou Message-ID: <20240819104630.2375441-1-chou.cosmo@gmail.com> Signed-off-by: Guenter Roeck --- diff --git a/drivers/hwmon/pt5161l.c b/drivers/hwmon/pt5161l.c index b0d58a26d499d..a9f0b23f9e76e 100644 --- a/drivers/hwmon/pt5161l.c +++ b/drivers/hwmon/pt5161l.c @@ -427,7 +427,7 @@ static int pt5161l_read(struct device *dev, enum hwmon_sensor_types type, struct pt5161l_data *data = dev_get_drvdata(dev); int ret; u8 buf[8]; - long adc_code; + u32 adc_code; switch (attr) { case hwmon_temp_input: @@ -449,7 +449,7 @@ static int pt5161l_read(struct device *dev, enum hwmon_sensor_types type, adc_code = buf[3] << 24 | buf[2] << 16 | buf[1] << 8 | buf[0]; if (adc_code == 0 || adc_code >= 0x3ff) { - dev_dbg(dev, "Invalid adc_code %lx\n", adc_code); + dev_dbg(dev, "Invalid adc_code %x\n", adc_code); return -EIO; }