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authorJae Hyun Yoo2018-07-02 14:40:11 -0700
committerWolfram Sang2018-07-21 00:23:42 +0200
commit263fe5d45dcd0c610e41d1662f83cdd43b881cc5 (patch)
tree9fb93d74a9c07b5c7d9e40b1b0672dd711b3775a
parent517fde0eb5a8f46c54ba6e2c36e32563b23cb14f (diff)
i2c: aspeed: Adjust spinlock scope in the irq handler
This patch adjusts spinlock scope to make it wrap the whole irq handler using a single lock/unlock which covers both master and slave handlers. Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
-rw-r--r--drivers/i2c/busses/i2c-aspeed.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index e056a316289f..efb89422d496 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -234,7 +234,6 @@ static bool aspeed_i2c_slave_irq(struct aspeed_i2c_bus *bus)
bool irq_handled = true;
u8 value;
- spin_lock(&bus->lock);
if (!slave) {
irq_handled = false;
goto out;
@@ -325,7 +324,6 @@ static bool aspeed_i2c_slave_irq(struct aspeed_i2c_bus *bus)
writel(status_ack, bus->base + ASPEED_I2C_INTR_STS_REG);
out:
- spin_unlock(&bus->lock);
return irq_handled;
}
#endif /* CONFIG_I2C_SLAVE */
@@ -389,7 +387,6 @@ static bool aspeed_i2c_master_irq(struct aspeed_i2c_bus *bus)
u8 recv_byte;
int ret;
- spin_lock(&bus->lock);
irq_status = readl(bus->base + ASPEED_I2C_INTR_STS_REG);
/* Ack all interrupt bits. */
writel(irq_status, bus->base + ASPEED_I2C_INTR_STS_REG);
@@ -547,22 +544,29 @@ out_no_complete:
dev_err(bus->dev,
"irq handled != irq. expected 0x%08x, but was 0x%08x\n",
irq_status, status_ack);
- spin_unlock(&bus->lock);
return !!irq_status;
}
static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
{
struct aspeed_i2c_bus *bus = dev_id;
+ bool ret;
+
+ spin_lock(&bus->lock);
#if IS_ENABLED(CONFIG_I2C_SLAVE)
if (aspeed_i2c_slave_irq(bus)) {
dev_dbg(bus->dev, "irq handled by slave.\n");
- return IRQ_HANDLED;
+ ret = true;
+ goto out;
}
#endif /* CONFIG_I2C_SLAVE */
- return aspeed_i2c_master_irq(bus) ? IRQ_HANDLED : IRQ_NONE;
+ ret = aspeed_i2c_master_irq(bus);
+
+out:
+ spin_unlock(&bus->lock);
+ return ret ? IRQ_HANDLED : IRQ_NONE;
}
static int aspeed_i2c_master_xfer(struct i2c_adapter *adap,