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| author | Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> | 2014-09-15 00:20:19 +0400 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2014-09-29 22:41:18 +0200 |
| commit | aa5beaf62588d095398415af5d0e14c79e2478a3 (patch) | |
| tree | cdf1548680ed529ab8273090a13c371dc784958e /drivers | |
| parent | 7c7117ffe08fd54d4129e378b46a812c717bae48 (diff) | |
| download | linux-aa5beaf62588d095398415af5d0e14c79e2478a3.tar.gz linux-aa5beaf62588d095398415af5d0e14c79e2478a3.tar.bz2 linux-aa5beaf62588d095398415af5d0e14c79e2478a3.zip | |
i2c: rcar: check for no IRQ in rcar_i2c_irq()
Check if the ICMSR register (masked with the ICMIER register) evaluates to 0 in
the driver's interrupt handler and return IRQ_NONE in that case, like many other
drivers do.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index c49b33e99d68..b694cba63807 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, |