From 2151ba7584b73255ae057892bb9c2de358af9502 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Thu, 3 Sep 2015 22:20:11 +0200 Subject: [PATCH] i2c: rcar: check master irqs before slave irqs Due to broken HW design, master IRQs are more timing critical, so give them precedence over slave IRQ. Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-rcar.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index dcf9fc77cec7..06bd8c45c6af 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -435,19 +435,17 @@ static bool rcar_i2c_slave_irq(struct rcar_i2c_priv *priv) static irqreturn_t rcar_i2c_irq(int irq, void *ptr) { struct rcar_i2c_priv *priv = ptr; - irqreturn_t result = IRQ_HANDLED; u32 msr; - if (rcar_i2c_slave_irq(priv)) - goto exit; - msr = rcar_i2c_read(priv, ICMSR); /* Only handle interrupts that are currently enabled */ msr &= rcar_i2c_read(priv, ICMIER); if (!msr) { - result = IRQ_NONE; - goto exit; + if (rcar_i2c_slave_irq(priv)) + return IRQ_HANDLED; + + return IRQ_NONE; } /* Arbitration lost */ @@ -484,8 +482,7 @@ out: wake_up(&priv->wait); } -exit: - return result; + return IRQ_HANDLED; } static int rcar_i2c_master_xfer(struct i2c_adapter *adap, -- 2.20.1