diff --git a/drivers/mtd/maps/pismo.c b/drivers/mtd/maps/pismo.c
index 788d4996e2c1..946ba80f9758 100644
--- a/drivers/mtd/maps/pismo.c
+++ b/drivers/mtd/maps/pismo.c
@@ -211,13 +211,12 @@ static int pismo_remove(struct i2c_client *client)
 static int pismo_probe(struct i2c_client *client,
 		       const struct i2c_device_id *id)
 {
-	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 	struct pismo_pdata *pdata = client->dev.platform_data;
 	struct pismo_eeprom eeprom;
 	struct pismo_data *pismo;
 	int ret, i;
 
-	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 		dev_err(&client->dev, "functionality mismatch\n");
 		return -EIO;
 	}