diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index c49b33e99d6863078c7150c3e34b1d153c4f0da1..b694cba6380742dd19984a7fdf1c67875b78f7aa 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -363,6 +363,7 @@ static int rcar_i2c_irq_recv(struct rcar_i2c_priv *priv, u32 msr) static irqreturn_t rcar_i2c_irq(int irq, void *ptr) { struct rcar_i2c_priv *priv = ptr; + irqreturn_t result = IRQ_HANDLED; u32 msr; /*-------------- spin lock -----------------*/ @@ -372,6 +373,10 @@ static irqreturn_t rcar_i2c_irq(int irq, void *ptr) /* Only handle interrupts that are currently enabled */ msr &= rcar_i2c_read(priv, ICMIER); + if (!msr) { + result = IRQ_NONE; + goto exit; + } /* Arbitration lost */ if (msr & MAL) { @@ -406,10 +411,11 @@ out: wake_up(&priv->wait); } +exit: spin_unlock(&priv->lock); /*-------------- spin unlock -----------------*/ - return IRQ_HANDLED; + return result; } static int rcar_i2c_master_xfer(struct i2c_adapter *adap,