linux-kernel - [tip: irq/core] genirq/test: Fix depth tests on architectures with NOREQUEST by default.

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Message-ID: <175691235363.1920.260429564520251502.tip-bot2@tip-bot2>
Date: Wed, 03 Sep 2025 15:12:33 -0000
From: "tip-bot2 for David Gow" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: David Gow <davidgow@...gle.com>, Thomas Gleixner <tglx@...utronix.de>,
 Guenter Roeck <linux@...ck-us.net>, Brian Norris <briannorris@...omium.org>,
 x86@...nel.org, linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/core] genirq/test: Fix depth tests on architectures with
 NOREQUEST by default.

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     c9163915a93d40e32c4e4aeb942c0adcb190d72e
Gitweb:        https://git.kernel.org/tip/c9163915a93d40e32c4e4aeb942c0adcb190d72e
Author:        David Gow <davidgow@...gle.com>
AuthorDate:    Sat, 16 Aug 2025 17:45:28 +08:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 03 Sep 2025 17:04:51 +02:00

genirq/test: Fix depth tests on architectures with NOREQUEST by default.

The new irq KUnit tests fail on some architectures (notably PowerPC and
32-bit ARM), as the request_irq() call fails due to the ARCH_IRQ_INIT_FLAGS
containing IRQ_NOREQUEST, yielding the following errors:

[10:17:45]     # irq_free_disabled_test: EXPECTATION FAILED at kernel/irq/irq_test.c:88
[10:17:45]     Expected ret == 0, but
[10:17:45]         ret == -22 (0xffffffffffffffea)
[10:17:45]     # irq_free_disabled_test: EXPECTATION FAILED at kernel/irq/irq_test.c:90
[10:17:45]     Expected desc->depth == 0, but
[10:17:45]         desc->depth == 1 (0x1)
[10:17:45]     # irq_free_disabled_test: EXPECTATION FAILED at kernel/irq/irq_test.c:93
[10:17:45]     Expected desc->depth == 1, but
[10:17:45]         desc->depth == 2 (0x2)

By clearing IRQ_NOREQUEST from the interrupt descriptor, these tests now
pass on ARM and PowerPC.

Fixes: 66067c3c8a1e ("genirq: Add kunit tests for depth counts")
Signed-off-by: David Gow <davidgow@...gle.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Guenter Roeck <linux@...ck-us.net>
Tested-by: Brian Norris <briannorris@...omium.org>
Reviewed-by: Brian Norris <briannorris@...omium.org>
Link: https://lore.kernel.org/all/20250816094528.3560222-2-davidgow@google.com

---
 kernel/irq/irq_test.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/kernel/irq/irq_test.c b/kernel/irq/irq_test.c
index a75abeb..e220e7b 100644
--- a/kernel/irq/irq_test.c
+++ b/kernel/irq/irq_test.c
@@ -54,6 +54,9 @@ static void irq_disable_depth_test(struct kunit *test)
 	desc = irq_to_desc(virq);
 	KUNIT_ASSERT_PTR_NE(test, desc, NULL);
 
+	/* On some architectures, IRQs are NOREQUEST | NOPROBE by default. */
+	irq_settings_clr_norequest(desc);
+
 	ret = request_irq(virq, noop_handler, 0, "test_irq", NULL);
 	KUNIT_EXPECT_EQ(test, ret, 0);
 
@@ -81,6 +84,9 @@ static void irq_free_disabled_test(struct kunit *test)
 	desc = irq_to_desc(virq);
 	KUNIT_ASSERT_PTR_NE(test, desc, NULL);
 
+	/* On some architectures, IRQs are NOREQUEST | NOPROBE by default. */
+	irq_settings_clr_norequest(desc);
+
 	ret = request_irq(virq, noop_handler, 0, "test_irq", NULL);
 	KUNIT_EXPECT_EQ(test, ret, 0);
 
@@ -120,6 +126,9 @@ static void irq_shutdown_depth_test(struct kunit *test)
 	desc = irq_to_desc(virq);
 	KUNIT_ASSERT_PTR_NE(test, desc, NULL);
 
+	/* On some architectures, IRQs are NOREQUEST | NOPROBE by default. */
+	irq_settings_clr_norequest(desc);
+
 	data = irq_desc_get_irq_data(desc);
 	KUNIT_ASSERT_PTR_NE(test, data, NULL);
 
@@ -180,6 +189,9 @@ static void irq_cpuhotplug_test(struct kunit *test)
 	desc = irq_to_desc(virq);
 	KUNIT_ASSERT_PTR_NE(test, desc, NULL);
 
+	/* On some architectures, IRQs are NOREQUEST | NOPROBE by default. */
+	irq_settings_clr_norequest(desc);
+
 	data = irq_desc_get_irq_data(desc);
 	KUNIT_ASSERT_PTR_NE(test, data, NULL);