From 7f2c0662e5cfd05f12ca49109e8f787bf2d87b66 Mon Sep 17 00:00:00 2001
From: Guenter Roeck <guenter.roeck@ericsson.com>
Date: Sat, 25 Jun 2011 12:42:14 -0700
Subject: [PATCH] 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
---
drivers/hwmon/pmbus_core.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/hwmon/pmbus_core.c b/drivers/hwmon/pmbus_core.c
index 354770ed3186c..744672c1f26d6 100644
--- 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;
}