diff options
| author | Dmitry Bazhenov <bazhenov.dn@gmail.com> | 2018-10-15 12:21:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-13 22:16:45 +0300 |
| commit | 4f173e6911cd68a4ace5c9311b4f6d9f804ec568 (patch) | |
| tree | 997384b45aa2cf07fc09ce913b77c7777d35696d | |
| parent | 0d38b80894bfdda08f900299023f0e1118be68b7 (diff) | |
| download | linux-4f173e6911cd68a4ace5c9311b4f6d9f804ec568.tar.xz | |
hwmon: (pmbus) Fix page count auto-detection.
commit e7c6a55606b5c46b449d76588968b4d8caae903f upstream.
Devices with compatible="pmbus" field have zero initial page count,
and pmbus_clear_faults() being called before the page count auto-
detection does not actually clear faults because it depends on the
page count. Non-cleared faults in its turn may fail the subsequent
page count auto-detection.
This patch fixes this problem by calling pmbus_clear_fault_page()
for currently set page and calling pmbus_clear_faults() after the
page count was detected.
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Bazhenov <bazhenov.dn@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus.c | 2 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/hwmon/pmbus/pmbus.c b/drivers/hwmon/pmbus/pmbus.c index 44ca8a94873d..2fe5a9952127 100644 --- a/drivers/hwmon/pmbus/pmbus.c +++ b/drivers/hwmon/pmbus/pmbus.c @@ -118,6 +118,8 @@ static int pmbus_identify(struct i2c_client *client, } else { info->pages = 1; } + + pmbus_clear_faults(client); } if (pmbus_check_byte_register(client, 0, PMBUS_VOUT_MODE)) { diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index d013acf3f83a..c00bad02761a 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -1759,7 +1759,10 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK)) client->flags |= I2C_CLIENT_PEC; - pmbus_clear_faults(client); + if (data->info->pages) + pmbus_clear_faults(client); + else + pmbus_clear_fault_page(client, -1); if (info->identify) { ret = (*info->identify)(client, info); |