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From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: linux-mips@vger.kernel.org
Cc: chenhc@lemote.com, paul.burton@mips.com,
	linux-kernel@vger.kernel.org, maz@kernel.org, tglx@linutronix.de,
	Jiaxun Yang <jiaxun.yang@flygoat.com>
Subject: [PATCH v1 2/2] irqchip: mips-cpu: Drop unnecessary ack/eoi operations
Date: Fri, 17 Jan 2020 08:17:06 +0800	[thread overview]
Message-ID: <20200117001706.40620-2-jiaxun.yang@flygoat.com> (raw)
In-Reply-To: <20200117001706.40620-1-jiaxun.yang@flygoat.com>

Actually, all MIPS processor interrupt lines are level triggered.
So providing ack/eoi operation could lead to some unexpected results,
Like chained IRQ handeler failed to mask upstream CPU IRQ.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 drivers/irqchip/irq-mips-cpu.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/irqchip/irq-mips-cpu.c b/drivers/irqchip/irq-mips-cpu.c
index 95d4fd8f7a96..e34f4317bb88 100644
--- a/drivers/irqchip/irq-mips-cpu.c
+++ b/drivers/irqchip/irq-mips-cpu.c
@@ -51,11 +51,9 @@ static inline void mask_mips_irq(struct irq_data *d)
 
 static struct irq_chip mips_cpu_irq_controller = {
 	.name		= "MIPS",
-	.irq_ack	= mask_mips_irq,
 	.irq_mask	= mask_mips_irq,
 	.irq_mask_ack	= mask_mips_irq,
 	.irq_unmask	= unmask_mips_irq,
-	.irq_eoi	= unmask_mips_irq,
 	.irq_disable	= mask_mips_irq,
 	.irq_enable	= unmask_mips_irq,
 };
@@ -112,11 +110,9 @@ static void mips_mt_send_ipi(struct irq_data *d, unsigned int cpu)
 static struct irq_chip mips_mt_cpu_irq_controller = {
 	.name		= "MIPS",
 	.irq_startup	= mips_mt_cpu_irq_startup,
-	.irq_ack	= mips_mt_cpu_irq_ack,
 	.irq_mask	= mask_mips_irq,
 	.irq_mask_ack	= mips_mt_cpu_irq_ack,
 	.irq_unmask	= unmask_mips_irq,
-	.irq_eoi	= unmask_mips_irq,
 	.irq_disable	= mask_mips_irq,
 	.irq_enable	= unmask_mips_irq,
 #ifdef CONFIG_GENERIC_IRQ_IPI
-- 
2.24.1


  reply	other threads:[~2020-01-17  0:17 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-13 10:12 [PATCH] irqchip: mips-cpu: Remove eoi operation Jiaxun Yang
2020-01-14 23:30 ` Paul Burton
2020-01-15  0:03   ` Jiaxun Yang
2020-01-15 13:40   ` Marc Zyngier
2020-01-15 14:23     ` Jiaxun Yang
2020-01-15 15:22       ` Marc Zyngier
2020-01-17  0:17 ` [PATCH v1 1/2] genirq: Check for level based percpu irq Jiaxun Yang
2020-01-17  0:17   ` Jiaxun Yang [this message]
2020-01-17  1:29   ` Thomas Gleixner
2020-01-17  2:23     ` Jiaxun Yang

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