msg_done_handler
static void msg_done_handler(struct ssif_info *ssif_info, int result,
ssif_i2c_send(ssif_info, msg_done_handler, I2C_SMBUS_READ,
ssif_i2c_send(ssif_info, msg_done_handler, I2C_SMBUS_READ,
ssif_i2c_send(ssif_info, msg_done_handler,
msg_done_handler(ssif_info, -EIO, NULL, 0);