static int idt82p33_probe()

in ptp_idt82p33.c [1000:1060]

• 49 lines of code
• 8 McCabe index (conditional complexity)

static int idt82p33_probe(struct i2c_client *client,
			  const struct i2c_device_id *id)
{
	struct idt82p33 *idt82p33;
	int err;
	u8 i;

	(void)id;

	idt82p33 = devm_kzalloc(&client->dev,
				sizeof(struct idt82p33), GFP_KERNEL);
	if (!idt82p33)
		return -ENOMEM;

	mutex_init(&idt82p33->reg_lock);

	idt82p33->client = client;
	idt82p33->page_offset = 0xff;
	idt82p33->tod_write_overhead_ns = 0;
	idt82p33->calculate_overhead_flag = 0;
	idt82p33->pll_mask = DEFAULT_PLL_MASK;
	idt82p33->channel[0].output_mask = DEFAULT_OUTPUT_MASK_PLL0;
	idt82p33->channel[1].output_mask = DEFAULT_OUTPUT_MASK_PLL1;

	mutex_lock(&idt82p33->reg_lock);

	err = idt82p33_load_firmware(idt82p33);

	if (err)
		dev_warn(&idt82p33->client->dev,
			 "loading firmware failed with %d\n", err);

	if (idt82p33->pll_mask) {
		for (i = 0; i < MAX_PHC_PLL; i++) {
			if (idt82p33->pll_mask & (1 << i)) {
				err = idt82p33_enable_channel(idt82p33, i);
				if (err) {
					dev_err(&idt82p33->client->dev,
						"Failed in %s with err %d!\n",
						__func__, err);
					break;
				}
			}
		}
	} else {
		dev_err(&idt82p33->client->dev,
			"no PLLs flagged as PHCs, nothing to do\n");
		err = -ENODEV;
	}

	mutex_unlock(&idt82p33->reg_lock);

	if (err) {
		idt82p33_ptp_clock_unregister_all(idt82p33);
		return err;
	}

	i2c_set_clientdata(client, idt82p33);

	return 0;
}