On Thu, 18 Jan 2024 11:27:39 +0000, Dawei Li dawei.li@shingroup.cn wrote:

For !CONFIG_SPARSE_IRQ kernel, early_irq_init() is supposed to initialize all the desc entries in system, desc->resend_node included.

Thus, initialize desc->resend_node for all irq_desc entries, rather than irq_desc[0] only, which is the current implementation is about.

Fixes: bc06a9e08742 ("genirq: Use hlist for managing resend handlers") Cc: stable@vger.kernel.org

Signed-off-by: Dawei Li 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 27ca1c866f29..371eb1711d34 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();

}

Well spotted. It would probably be worth having a helper that fully initialises one desc, but that's out of the scope of this fix.

Acked-by: Marc Zyngier maz@kernel.org

M.