linux-kernel - [tip: irq/core] genirq: Initialize resend_node hlist for all interrupt descriptors

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Date: Wed, 24 Jan 2024 18:35:20 -0000
From: "tip-bot2 for Dawei Li" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Dawei Li <dawei.li@...ngroup.cn>, Thomas Gleixner <tglx@...utronix.de>,
 Marc Zyngier <maz@...nel.org>, stable@...r.kernel.org, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: irq/core] genirq: Initialize resend_node hlist for all
 interrupt descriptors

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

Commit-ID:     b184c8c2889ceef0a137c7d0567ef9fe3d92276e
Gitweb:        https://git.kernel.org/tip/b184c8c2889ceef0a137c7d0567ef9fe3d92276e
Author:        Dawei Li <dawei.li@...ngroup.cn>
AuthorDate:    Mon, 22 Jan 2024 16:57:15 +08:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 24 Jan 2024 14:15:41 +01:00

genirq: Initialize resend_node hlist for all interrupt descriptors

For a CONFIG_SPARSE_IRQ=n kernel, early_irq_init() is supposed to
initialize all interrupt descriptors.

It does except for irq_desc::resend_node, which ia only initialized for the
first descriptor.

Use the indexed decriptor and not the base pointer to address that.

Fixes: bc06a9e08742 ("genirq: Use hlist for managing resend handlers")
Signed-off-by: Dawei Li <dawei.li@...ngroup.cn>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Marc Zyngier <maz@...nel.org>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20240122085716.2999875-5-dawei.li@shingroup.cn


---
 kernel/irq/irqdesc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 27ca1c8..371eb17 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -600,7 +600,7 @@ int __init early_irq_init(void)
 		mutex_init(&desc[i].request_mutex);
 		init_waitqueue_head(&desc[i].wait_for_threads);
 		desc_set_defaults(i, &desc[i], node, NULL, NULL);
-		irq_resend_init(desc);
+		irq_resend_init(&desc[i]);
 	}
 	return arch_early_irq_init();
 }