static int riocm_ch_bind()

in rio_cm.c [1228:1272]

• 38 lines of code
• 6 McCabe index (conditional complexity)

static int riocm_ch_bind(u16 ch_id, u8 mport_id, void *context)
{
	struct rio_channel *ch = NULL;
	struct cm_dev *cm;
	int rc = -ENODEV;

	riocm_debug(CHOP, "ch_%d to mport_%d", ch_id, mport_id);

	/* Find matching cm_dev object */
	down_read(&rdev_sem);
	list_for_each_entry(cm, &cm_dev_list, list) {
		if ((cm->mport->id == mport_id) &&
		     rio_mport_is_running(cm->mport)) {
			rc = 0;
			break;
		}
	}

	if (rc)
		goto exit;

	ch = riocm_get_channel(ch_id);
	if (!ch) {
		rc = -EINVAL;
		goto exit;
	}

	spin_lock_bh(&ch->lock);
	if (ch->state != RIO_CM_IDLE) {
		spin_unlock_bh(&ch->lock);
		rc = -EINVAL;
		goto err_put;
	}

	ch->cmdev = cm;
	ch->loc_destid = cm->mport->host_deviceid;
	ch->context = context;
	ch->state = RIO_CM_CHAN_BOUND;
	spin_unlock_bh(&ch->lock);
err_put:
	riocm_put_channel(ch);
exit:
	up_read(&rdev_sem);
	return rc;
}