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Date: Tue, 25 Aug 2020 06:38:10 +0000 From: Joel Stanley <joel@....id.au> To: Eddie James <eajames@...ux.ibm.com> Cc: linux-input@...r.kernel.org, devicetree <devicetree@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-aspeed <linux-aspeed@...ts.ozlabs.org>, linux-i2c@...r.kernel.org, Andrew Jeffery <andrew@...id.au>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Brendan Higgins <brendanhiggins@...gle.com>, dmitry.torokhov@...il.com, Rob Herring <robh+dt@...nel.org> Subject: Re: [PATCH 3/5] i2c: aspeed: Mask IRQ status to relevant bits On Thu, 20 Aug 2020 at 16:12, Eddie James <eajames@...ux.ibm.com> wrote: > > 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; This would defeat the check for irq_remaining. I don't think we want to do this. Can you explain why these bits are being set in slave mode?
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