During debug, we found that the return value of __irq_domain_alloc_irqs() will be overwritten by the return value of subsequent function. As a result, the locating clue will be lost.
To improve debug efficiency, an error message is added to print the return value of __irq_domain_alloc_irqs().
Signed-off-by: Luo Jiaxing luojiaxing@huawei.com --- kernel/irq/msi.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index b338d62..f8729b0 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -418,6 +418,7 @@ int __msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, desc->affinity); if (virq < 0) { ret = -ENOSPC; + dev_err(dev, "failed to allocate irq, virq=%d\n", virq); if (ops->handle_error) ret = ops->handle_error(domain, desc, ret); if (ops->msi_finish)