linux-kernel - [PATCH 5.15 163/171] irqchip/aspeed-scu: Replace update_bits with write

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Message-Id: <20211213092950.497257971@linuxfoundation.org>
Date:   Mon, 13 Dec 2021 10:31:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Billy Tsai <billy_tsai@...eedtech.com>,
        Joel Stanley <joel@....id.au>, Marc Zyngier <maz@...nel.org>
Subject: [PATCH 5.15 163/171] irqchip/aspeed-scu: Replace update_bits with write_bits.

From: Billy Tsai <billy_tsai@...eedtech.com>

commit 8958389681b929fcc7301e7dc5f0da12e4a256a0 upstream.

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>
Reviewed-by: Joel Stanley <joel@....id.au>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/20211124094348.11621-1-billy_tsai@aspeedtech.com
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/irqchip/irq-aspeed-scu-ic.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- 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(st
 		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);