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hwmon: (pmbus/adm1275) Accept negative page register values

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[ Upstream commit ecb29abd4c ]

A negative page register value means that no page needs to be
selected. This is used by status register read operations and needs
to be accepted. The failure to do so so results in missed status
and limit registers.

Fixes: da8e48ab48 ("hwmon: (pmbus) Always call _pmbus_read_byte in core driver")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Guenter Roeck
2018-03-10 17:55:47 -08:00
committed by Greg Kroah-Hartman
parent 770d3eadef
commit 0bd0d4ff70
1 changed files with 2 additions and 2 deletions
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4
drivers/hwmon/pmbus/adm1275.c
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@@ -141,7 +141,7 @@ static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
const struct adm1275_data *data = to_adm1275_data(info);
int ret = 0;
if (page)
if (page > 0)
return -ENXIO;
switch (reg) {
@@ -218,7 +218,7 @@ static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
const struct adm1275_data *data = to_adm1275_data(info);
int ret;
if (page)
if (page > 0)
return -ENXIO;
switch (reg) {