From: Xu Qiang <xuqiang36@huawei.com>
Date: Tue, 19 Jul 2022 06:36:40 +0000 (+0000)
Subject: irqdomain: Report irq number for NOMAP domains
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9d2a0422dedc72aa051a2dcb45cae31cf7db3ee4;p=linux.git

irqdomain: Report irq number for NOMAP domains

[ Upstream commit 6f194c99f466147148cc08452718b46664112548 ]

When using a NOMAP domain, __irq_resolve_mapping() doesn't store
the Linux IRQ number at the address optionally provided by the caller.
While this isn't a huge deal (the returned value is guaranteed
to the hwirq that was passed as a parameter), let's honour the letter
of the API by writing the expected value.

Fixes: d22558dd0a6c (“irqdomain: Introduce irq_resolve_mapping()”)
Signed-off-by: Xu Qiang <xuqiang36@huawei.com>
[maz: commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220719063641.56541-2-xuqiang36@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 4d8fc65cf38f4..035e3038c4de4 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -910,6 +910,8 @@ struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain,
 			data = irq_domain_get_irq_data(domain, hwirq);
 			if (data && data->hwirq == hwirq)
 				desc = irq_data_to_desc(data);
+			if (irq && desc)
+				*irq = hwirq;
 		}
 
 		return desc;