static ssize_t pdc_debugfs_read()

in bcm-pdc-mailbox.c [424:476]

• 48 lines of code
• 3 McCabe index (conditional complexity)

static ssize_t pdc_debugfs_read(struct file *filp, char __user *ubuf,
				size_t count, loff_t *offp)
{
	struct pdc_state *pdcs;
	char *buf;
	ssize_t ret, out_offset, out_count;

	out_count = 512;

	buf = kmalloc(out_count, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	pdcs = filp->private_data;
	out_offset = 0;
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "SPU %u stats:\n", pdcs->pdc_idx);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "PDC requests....................%u\n",
			       pdcs->pdc_requests);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "PDC responses...................%u\n",
			       pdcs->pdc_replies);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "Tx not done.....................%u\n",
			       pdcs->last_tx_not_done);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "Tx ring full....................%u\n",
			       pdcs->tx_ring_full);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "Rx ring full....................%u\n",
			       pdcs->rx_ring_full);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "Tx desc write fail. Ring full...%u\n",
			       pdcs->txnobuf);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "Rx desc write fail. Ring full...%u\n",
			       pdcs->rxnobuf);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "Receive overflow................%u\n",
			       pdcs->rx_oflow);
	out_offset += scnprintf(buf + out_offset, out_count - out_offset,
			       "Num frags in rx ring............%u\n",
			       NRXDACTIVE(pdcs->rxin, pdcs->last_rx_curr,
					  pdcs->nrxpost));

	if (out_offset > out_count)
		out_offset = out_count;

	ret = simple_read_from_buffer(ubuf, count, offp, buf, out_offset);
	kfree(buf);
	return ret;
}