[PATCH] i2c: i2c-tegra: replace spin_lock_irqsave with spin_lock in ISR
From: jun qian <hidden>
Date: 2018-09-11 14:54:57
Also in:
linux-i2c, lkml
Subsystem:
i2c subsystem, i2c subsystem host drivers, tegra i2c driver, the rest · Maintainers:
Wolfram Sang, Andi Shyti, Laxman Dewangan, Linus Torvalds
As you are already in ISR, it is unnecessary to call spin_lock_irqsave. Signed-off-by: jun qian <redacted> --- drivers/i2c/busses/i2c-tegra.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 60c8561fbe65..59f31d3a508f 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c@@ -608,11 +608,10 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id) u32 status; const u32 status_err = I2C_INT_NO_ACK | I2C_INT_ARBITRATION_LOST; struct tegra_i2c_dev *i2c_dev = dev_id; - unsigned long flags; status = i2c_readl(i2c_dev, I2C_INT_STATUS); - spin_lock_irqsave(&i2c_dev->xfer_lock, flags); + spin_lock(&i2c_dev->xfer_lock); if (status == 0) { dev_warn(i2c_dev->dev, "irq status 0 %08x %08x %08x\n", i2c_readl(i2c_dev, I2C_PACKET_TRANSFER_STATUS),
@@ -670,7 +669,7 @@ static irqreturn_t tegra_i2c_isr(int irq, void *dev_id) complete(&i2c_dev->msg_complete); done: - spin_unlock_irqrestore(&i2c_dev->xfer_lock, flags); + spin_unlock(&i2c_dev->xfer_lock); return IRQ_HANDLED; }
--
2.17.1