diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2015-11-19 16:56:48 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-11-30 14:22:11 +0100 |
| commit | c3be0af15959e11fa535d5332ab3d7cf34abd09b (patch) | |
| tree | 3a49e139c2b2cef1d6bfe5b2368dfe3cb15f9bd7 | |
| parent | i2c: rcar: don't issue stop when HW does it automatically (diff) | |
| download | linux-c3be0af15959e11fa535d5332ab3d7cf34abd09b.tar.xz linux-c3be0af15959e11fa535d5332ab3d7cf34abd09b.zip | |
i2c: rcar: check master irqs before slave irqs
Due to the HW design, master IRQs are timing critical, so give them
precedence over slave IRQ.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
| -rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 87fccf20fc4c..f237b4fc5b5e 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -432,19 +432,17 @@ 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 */ @@ -481,8 +479,7 @@ out: wake_up(&priv->wait); } -exit: - return result; + return IRQ_HANDLED; } static int rcar_i2c_master_xfer(struct i2c_adapter *adap, |