hwmon: (pmbus) Drop check for PMBus revision register in probe function

Some PMBus devices do not support the PMBus revision register, so don't check
if it exists.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
Cc: stable.kernel.org # 2.6.39

diff --git a/drivers/hwmon/pmbus_core.c b/drivers/hwmon/pmbus_core.c
index 354770ed3186cdfa30ae07fcd829f5b46906f7e4..744672c1f26d6be2b499f51e59d1dfead082d94d 100644 (file)
--- a/drivers/hwmon/pmbus_core.c
+++ b/drivers/hwmon/pmbus_core.c
@@ -1430,14 +1430,9 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
        i2c_set_clientdata(client, data);
        mutex_init(&data->update_lock);
 
-       /*
-        * Bail out if status register or PMBus revision register
-        * does not exist.
-        */
-       if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0
-           || i2c_smbus_read_byte_data(client, PMBUS_REVISION) < 0) {
-               dev_err(&client->dev,
-                       "Status or revision register not found\n");
+       /* Bail out if PMBus status register does not exist. */
+       if (i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE) < 0) {
+               dev_err(&client->dev, "PMBus status register not found\n");
                ret = -ENODEV;
                goto out_data;
        }