2.6.39-stable review patch. If anyone has any objections, please let us know.
------------------
From: Guenter Roeck <guenter.ro...@ericsson.com>
commit 7f2c0662e5cfd05f12ca49109e8f787bf2d87b66 upstream.
Some PMBus devices do not support the PMBus revision register, so don't check
if it exists.
Signed-off-by: Guenter Roeck <guenter.ro...@ericsson.com>
Reviewed-by: Robert Coulson <robert.coul...@ericsson.com>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
drivers/hwmon/pmbus_core.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
--- a/drivers/hwmon/pmbus_core.c
+++ b/drivers/hwmon/pmbus_core.c
@@ -1518,14 +1518,9 @@ int pmbus_do_probe(struct i2c_client *cl
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;
}
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