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| author | Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> | 2018-07-02 14:40:11 -0700 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2018-07-21 00:23:42 +0200 |
| commit | 263fe5d45dcd0c610e41d1662f83cdd43b881cc5 (patch) | |
| tree | 9fb93d74a9c07b5c7d9e40b1b0672dd711b3775a /drivers/i2c | |
| parent | 517fde0eb5a8f46c54ba6e2c36e32563b23cb14f (diff) | |
| download | linux-263fe5d45dcd0c610e41d1662f83cdd43b881cc5.tar.gz linux-263fe5d45dcd0c610e41d1662f83cdd43b881cc5.tar.bz2 linux-263fe5d45dcd0c610e41d1662f83cdd43b881cc5.zip | |
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>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-aspeed.c | 16 |
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, |