linux-kernel - [PATCH 3/5] i2c: aspeed: Mask IRQ status to relevant bits

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Date:   Thu, 20 Aug 2020 11:11:50 -0500
From:   Eddie James <eajames@...ux.ibm.com>
To:     linux-input@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-aspeed@...ts.ozlabs.org, linux-i2c@...r.kernel.org,
        joel@....id.au, andrew@...id.au, benh@...nel.crashing.org,
        brendanhiggins@...gle.com, dmitry.torokhov@...il.com,
        robh+dt@...nel.org, eajames@...ux.ibm.com
Subject: [PATCH 3/5] i2c: aspeed: Mask IRQ status to relevant bits

Mask the IRQ status to only the bits that the driver checks. This
prevents excessive driver warnings when operating in slave mode
when additional bits are set that the driver doesn't handle.

Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 drivers/i2c/busses/i2c-aspeed.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index 31268074c422..abf40f2af8b4 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -604,6 +604,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
 	writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE,
 	       bus->base + ASPEED_I2C_INTR_STS_REG);
 	readl(bus->base + ASPEED_I2C_INTR_STS_REG);
+	irq_received &= 0xf000ffff;
 	irq_remaining = irq_received;
 
 #if IS_ENABLED(CONFIG_I2C_SLAVE)
-- 
2.26.2