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hwmon: (ltc2945) Handle error case in ltc2945_value_store 

[ Upstream commit 178b01eccf ]

ltc2945_val_to_reg errors were not being handled
which would have resulted in register being set to
0 (clamped) instead of being left alone.

Fixes: 6700ce035f ("hwmon: Driver for Linear Technologies LTC2945")

Signed-off-by: Jonathan Cormier <jcormier@criticallink.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cormier 2023-01-26 17:32:25 -05:00 committed by Greg Kroah-Hartman
parent c710243ed6
commit 355d109fb6
1 changed files with 2 additions and 0 deletions
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2
drivers/hwmon/ltc2945.c
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@ -248,6 +248,8 @@ static ssize_t ltc2945_value_store(struct device *dev,
/* convert to register value, then clamp and write result */
regval = ltc2945_val_to_reg(dev, reg, val);
if (regval < 0)
return regval;
if (is_power_reg(reg)) {
regval = clamp_val(regval, 0, 0xffffff);
regbuf[0] = regval >> 16;