If CONFIG_I2C is m and CONFIG_I2C_SLAVE is y, building with CONFIG_IPMB_DEVICE_INTERFACE setting to y will fail:
drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_remove': ipmb_dev_int.c: undefined reference to `i2c_slave_unregister' drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_write': ipmb_dev_int.c: undefined reference to `i2c_smbus_write_block_data' drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_probe': ipmb_dev_int.c: undefined reference to `i2c_slave_register' drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_driver_init': ipmb_dev_int.c: undefined reference to `i2c_register_driver' drivers/char/ipmi/ipmb_dev_int.o: In function `ipmb_driver_exit': ipmb_dev_int.c: undefined reference to `i2c_del_driver' Add I2C Kconfig dependency to fix this. Reported-by: Hulk Robot <hul...@huawei.com> Fixes: 51bd6f291583 ("Add support for IPMB driver") Signed-off-by: YueHaibing <yuehaib...@huawei.com> --- drivers/char/ipmi/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig index 987191b..4bad061 100644 --- a/drivers/char/ipmi/Kconfig +++ b/drivers/char/ipmi/Kconfig @@ -135,6 +135,7 @@ config ASPEED_BT_IPMI_BMC config IPMB_DEVICE_INTERFACE tristate 'IPMB Interface handler' + depends on I2C depends on I2C_SLAVE help Provides a driver for a device (Satellite MC) to -- 2.7.4