Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 106/206] hwmon: (amc6821) sign extension temperature | Date | Tue, 10 Jan 2017 14:36:29 +0100 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Jared Bents <jared.bents@rockwellcollins.com>
commit 4538bfbf2d9f1fc48c07ac0cc0ee58716fe7fe96 upstream.
Converts the unsigned temperature values from the i2c read to be sign extended as defined in the datasheet so that negative temperatures are properly read.
Fixes: 28e6274d8fa67 ("hwmon: (amc6821) Avoid forward declaration") Signed-off-by: Jared Bents <jared.bents@rockwellcollins.com> Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com> [groeck: Dropped unnecessary continuation line] Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/hwmon/amc6821.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/hwmon/amc6821.c +++ b/drivers/hwmon/amc6821.c @@ -188,8 +188,8 @@ static struct amc6821_data *amc6821_upda !data->valid) { for (i = 0; i < TEMP_IDX_LEN; i++) - data->temp[i] = i2c_smbus_read_byte_data(client, - temp_reg[i]); + data->temp[i] = (int8_t)i2c_smbus_read_byte_data( + client, temp_reg[i]); data->stat1 = i2c_smbus_read_byte_data(client, AMC6821_REG_STAT1);
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