int ntbm_msi_request_threaded_irq()

in msi.c [282:323]

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

int ntbm_msi_request_threaded_irq(struct ntb_dev *ntb, irq_handler_t handler,
				  irq_handler_t thread_fn,
				  const char *name, void *dev_id,
				  struct ntb_msi_desc *msi_desc)
{
	struct device *dev = &ntb->pdev->dev;
	struct msi_desc *entry;
	int ret;

	if (!ntb->msi)
		return -EINVAL;

	msi_lock_descs(dev);
	msi_for_each_desc(entry, dev, MSI_DESC_ASSOCIATED) {
		if (irq_has_action(entry->irq))
			continue;

		ret = devm_request_threaded_irq(&ntb->dev, entry->irq, handler,
						thread_fn, 0, name, dev_id);
		if (ret)
			continue;

		if (ntb_msi_set_desc(ntb, entry, msi_desc)) {
			devm_free_irq(&ntb->dev, entry->irq, dev_id);
			continue;
		}

		ret = ntbm_msi_setup_callback(ntb, entry, msi_desc);
		if (ret) {
			devm_free_irq(&ntb->dev, entry->irq, dev_id);
			goto unlock;
		}

		ret = entry->irq;
		goto unlock;
	}
	ret = -ENODEV;

unlock:
	msi_unlock_descs(dev);
	return ret;
}