linux-kernel - [PATCH] irqchip: Replace update_bits with write

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Date:   Wed, 24 Nov 2021 17:43:48 +0800
From:   Billy Tsai <billy_tsai@...eedtech.com>
To:     <eajames@...ux.ibm.com>, <tglx@...utronix.de>, <maz@...nel.org>,
        <joel@....id.au>, <andrew@...id.au>,
        <linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <BMC-SW@...eedtech.com>
Subject: [PATCH] irqchip: Replace update_bits with write_bits.

The interrupt status bits are cleared by writing 1, we should force a
write to clear the interrupt without checking if the value has changed.

Fixes: 04f605906ff0 ("irqchip: Add Aspeed SCU interrupt controller")
Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
---
 drivers/irqchip/irq-aspeed-scu-ic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-aspeed-scu-ic.c b/drivers/irqchip/irq-aspeed-scu-ic.c
index f3c6855a4cef..18b77c3e6db4 100644
--- a/drivers/irqchip/irq-aspeed-scu-ic.c
+++ b/drivers/irqchip/irq-aspeed-scu-ic.c
@@ -76,8 +76,8 @@ static void aspeed_scu_ic_irq_handler(struct irq_desc *desc)
 		generic_handle_domain_irq(scu_ic->irq_domain,
 					  bit - scu_ic->irq_shift);
 
-		regmap_update_bits(scu_ic->scu, scu_ic->reg, mask,
-				   BIT(bit + ASPEED_SCU_IC_STATUS_SHIFT));
+		regmap_write_bits(scu_ic->scu, scu_ic->reg, mask,
+				  BIT(bit + ASPEED_SCU_IC_STATUS_SHIFT));
 	}
 
 	chained_irq_exit(chip, desc);
-- 
2.25.1