From: Akshu Agrawal <akshu.agrawal@xxxxxxx> commit 8ff2d7ca4a55dfabf12e876369835bd024eb4621 upstream. During adding of the adapter the slave device registration use to fail as the acpi companion field was not populated. Fixes: 9af1563a5486 ("i2c: cros-ec-tunnel: Make the device acpi compatible") Signed-off-by: Akshu Agrawal <akshu.agrawal@xxxxxxx> Acked-by: Raul E Rangel <rrangel@xxxxxxxxxxxx> Reviewed-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/i2c/busses/i2c-cros-ec-tunnel.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/i2c/busses/i2c-cros-ec-tunnel.c +++ b/drivers/i2c/busses/i2c-cros-ec-tunnel.c @@ -273,6 +273,7 @@ static int ec_i2c_probe(struct platform_ bus->adap.dev.parent = &pdev->dev; bus->adap.dev.of_node = pdev->dev.of_node; bus->adap.retries = I2C_MAX_RETRIES; + ACPI_COMPANION_SET(&bus->adap.dev, ACPI_COMPANION(&pdev->dev)); err = i2c_add_adapter(&bus->adap); if (err)