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authorGuenter Roeck <linux@roeck-us.net>2021-11-06 10:02:44 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-29 11:50:30 +0100
commitf20c86f5d161f9a75b12530caa4590c0cf9536cd (patch)
tree503ea0f389652784474f013a018f6e3ad34986a1 /drivers/hwmon
parent28f64994c48bfcfb0d5077867d466234ad55c748 (diff)
hwmon: (lm90) Fix usage of CONFIG2 register in detect function
[ Upstream commit fce15c45d3fbd9fc1feaaf3210d8e3f8b33dfd3a ] The detect function had a comment "Make compiler happy" when id did not read the second configuration register. As it turns out, the code was checking the contents of this register for manufacturer ID 0xA1 (NXP Semiconductor/Philips), but never actually read the register. So it wasn't surprising that the compiler complained, and it indeed had a point. Fix the code to read the register contents for manufacturer ID 0xa1. At the same time, the code was reading the register for manufacturer ID 0x41 (Analog Devices), but it was not using the results. In effect it was just checking if reading the register returned an error. That doesn't really add much if any value, so stop doing that. Fixes: f90be42fb383 ("hwmon: (lm90) Refactor reading of config2 register") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r--drivers/hwmon/lm90.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/hwmon/lm90.c b/drivers/hwmon/lm90.c
index c9ff08dbe10c..420f34127262 100644
--- a/drivers/hwmon/lm90.c
+++ b/drivers/hwmon/lm90.c
@@ -1209,12 +1209,11 @@ static int lm90_detect(struct i2c_client *client,
if (man_id < 0 || chip_id < 0 || config1 < 0 || convrate < 0)
return -ENODEV;
- if (man_id == 0x01 || man_id == 0x5C || man_id == 0x41) {
+ if (man_id == 0x01 || man_id == 0x5C || man_id == 0xA1) {
config2 = i2c_smbus_read_byte_data(client, LM90_REG_R_CONFIG2);
if (config2 < 0)
return -ENODEV;
- } else
- config2 = 0; /* Make compiler happy */
+ }
if ((address == 0x4C || address == 0x4D)
&& man_id == 0x01) { /* National Semiconductor */