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

[ 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: da8e48a ("hwmon: (pmbus) Always call _pmbus_read_byte in core driver") Signed-off-by: Guenter Roeck <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
turex · Dec 2, 2021 · d089c30 · d089c30
1 parent c576396
commit d089c30
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/drivers/hwmon/pmbus/adm1275.c b/drivers/hwmon/pmbus/adm1275.c
@@ -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) {