linux-kernel - [PATCH 4/6] genirq/test: Skip managed-affinity tests with !SPARSE

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Message-ID: <20250818192800.621408-5-briannorris@chromium.org>
Date: Mon, 18 Aug 2025 12:27:41 -0700
From: Brian Norris <briannorris@...omium.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: David Gow <davidgow@...gle.com>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-kernel@...r.kernel.org,
	kunit-dev@...glegroups.com,
	Brian Norris <briannorris@...omium.org>
Subject: [PATCH 4/6] genirq/test: Skip managed-affinity tests with !SPARSE_IRQ

Managed-affinity is only supported with CONFIG_SPARSE_IRQ=y, so
irq_shutdown_depth_test() would fail with !irqd_affinity_is_managed().
Skip such tests if they're run without support.

Many architectures 'select SPARSE_IRQ', so this is easy to miss.

Fixes: 66067c3c8a1e ("genirq: Add kunit tests for depth counts")
Reported-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Brian Norris <briannorris@...omium.org>
---

 kernel/irq/irq_test.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/irq/irq_test.c b/kernel/irq/irq_test.c
index 56baeb5041d6..ba85e4eb5211 100644
--- a/kernel/irq/irq_test.c
+++ b/kernel/irq/irq_test.c
@@ -46,6 +46,9 @@ static int irq_test_setup_fake_irq(struct kunit *test, struct irq_affinity_desc
 	struct irq_desc *desc;
 	int virq;
 
+	if (affd && !IS_ENABLED(CONFIG_SPARSE_IRQ))
+		kunit_skip(test, "requires CONFIG_SPARSE_IRQ for managed affinity");
+
 	virq = irq_domain_alloc_descs(-1, 1, 0, NUMA_NO_NODE, affd);
 	KUNIT_ASSERT_GE(test, virq, 0);
 
-- 
2.51.0.rc1.167.g924127e9c0-goog