[PATCH] ipmi: ipmb: Fix build error while CONFIG_I2C is set to m

[YueHaibing]

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 <hulkci@xxxxxxxxxx>
Fixes: 51bd6f291583 ("Add support for IPMB driver")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 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