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irqchip/riscv-imsic: Report successful hardware retrigger

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imsic_irq_retrigger() writes to the IMSIC MSI register to retrigger
an interrupt, but returns 0. The IRQ core treats zero as failure and
may schedule a software resend despite the hardware retrigger.

Return 1 after the MSI write to report successful hardware
retriggering and prevent the unnecessary software resend.

Fixes: 027e125acd ("irqchip/riscv-imsic: Add device MSI domain support for platform devices")
Signed-off-by: Avi Weiss <thnkslprpt@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20261026122641.3292904-2-thnkslprpt@gmail.com
This commit is contained in:
Avi Weiss 2026-10-26 14:26:42 +02:00 committed by Thomas Gleixner
parent 717862eac6
commit a2f482407d
1 changed files with 1 additions and 1 deletions
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2
drivers/irqchip/irq-riscv-imsic-platform.c
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@ -61,7 +61,7 @@ static int imsic_irq_retrigger(struct irq_data *d)
local = per_cpu_ptr(imsic->global.local, vec->cpu);
writel_relaxed(vec->local_id, local->msi_va);
return 0;
return 1;
}
static void imsic_irq_ack(struct irq_data *d)