1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/i2c/busses/i2c-stub.c b/drivers/i2c/busses/i2c-stub.c
index d08eeec53913..1b7b2af94036 100644
--- a/drivers/i2c/busses/i2c-stub.c
+++ b/drivers/i2c/busses/i2c-stub.c
@@ -43,7 +43,7 @@ struct stub_chip {
 
 static struct stub_chip *stub_chips;
 
-/* Return -1 on error. */
+/* Return negative errno on error. */
 static s32 stub_xfer(struct i2c_adapter * adap, u16 addr, unsigned short flags,
         char read_write, u8 command, int size, union i2c_smbus_data * data)
 {
@@ -120,7 +120,7 @@ static s32 stub_xfer(struct i2c_adapter * adap, u16 addr, unsigned short flags,
 
         default:
                 dev_dbg(&adap->dev, "Unsupported I2C/SMBus command\n");
-                ret = -1;
+                ret = -EOPNOTSUPP;
                 break;
         } /* switch (size) */
 
@@ -140,7 +140,7 @@ static const struct i2c_algorithm smbus_algorithm = {
 
 static struct i2c_adapter stub_adapter = {
         .owner          = THIS_MODULE,
-        .class          = I2C_CLASS_HWMON,
+        .class          = I2C_CLASS_HWMON | I2C_CLASS_SPD,
         .algo           = &smbus_algorithm,
         .name           = "SMBus stub driver",
 };