From: Marc Zyngier <maz@kernel.org>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
kernel-team@android.com, Jason Cooper <jason@lakedaemon.net>,
Valentin Schneider <valentin.schneider@arm.com>
Subject: [PATCH v2 1/4] genirq: Walk the irq_data hierarchy when resending an interrupt
Date: Thu, 3 Sep 2020 19:32:03 +0100 [thread overview]
Message-ID: <20200903183206.104838-2-maz@kernel.org> (raw)
In-Reply-To: <20200903183206.104838-1-maz@kernel.org>
On resending an interrupt, we only check the topmost irqchip for
a irq_retrigger callback. However, this callback could be implemented
at a lower level. Use irq_chip_retrigger_hierarchy() in this case.
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
kernel/irq/resend.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/kernel/irq/resend.c b/kernel/irq/resend.c
index c48ce19a257f..8ccd32a0cc80 100644
--- a/kernel/irq/resend.c
+++ b/kernel/irq/resend.c
@@ -86,6 +86,18 @@ static int irq_sw_resend(struct irq_desc *desc)
}
#endif
+static int try_retrigger(struct irq_desc *desc)
+{
+ if (desc->irq_data.chip->irq_retrigger)
+ return desc->irq_data.chip->irq_retrigger(&desc->irq_data);
+
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+ return irq_chip_retrigger_hierarchy(&desc->irq_data);
+#else
+ return 0;
+#endif
+}
+
/*
* IRQ resend
*
@@ -113,8 +125,7 @@ int check_irq_resend(struct irq_desc *desc, bool inject)
desc->istate &= ~IRQS_PENDING;
- if (!desc->irq_data.chip->irq_retrigger ||
- !desc->irq_data.chip->irq_retrigger(&desc->irq_data))
+ if (!try_retrigger(desc))
err = irq_sw_resend(desc);
/* If the retrigger was successfull, mark it with the REPLAY bit */
--
2.28.0
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next prev parent reply other threads:[~2020-09-03 18:33 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-03 18:32 [PATCH v2 0/4] irqchip/gic: Generalize use of HW-based retriggering Marc Zyngier
2020-09-03 18:32 ` Marc Zyngier [this message]
2020-09-04 19:28 ` [PATCH v2 1/4] genirq: Walk the irq_data hierarchy when resending an interrupt Valentin Schneider
2020-09-05 9:26 ` Marc Zyngier
2020-09-05 12:58 ` Valentin Schneider
2020-09-03 18:32 ` [PATCH v2 2/4] irqchip/gic-v2, v3: Implement irq_chip->irq_retrigger() Marc Zyngier
2020-09-03 18:32 ` [PATCH v2 3/4] irqchip/git-v3-its: Implement irq_retrigger callback for device-triggered LPIs Marc Zyngier
2020-09-03 18:32 ` [PATCH v2 4/4] irqchip/gic-v2, v3: Prevent SW resends entirely Marc Zyngier
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