4.9-stable review patch. If anyone has any objections, please let me know.
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From: Guenter Roeck linux@roeck-us.net
[ Upstream commit ecb29abd4cb0670c616fb563a078f25d777ce530 ]
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: da8e48ab483e1 ("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 --- drivers/hwmon/pmbus/adm1275.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -154,7 +154,7 @@ static int adm1275_read_word_data(struct const struct adm1275_data *data = to_adm1275_data(info); int ret = 0;
- if (page) + if (page > 0) return -ENXIO;
switch (reg) { @@ -240,7 +240,7 @@ static int adm1275_write_word_data(struc const struct adm1275_data *data = to_adm1275_data(info); int ret;
- if (page) + if (page > 0) return -ENXIO;
switch (reg) {