Switch to use threaded interrupt context in order to avoid checking of "are we in interrupt?" for the code that may sleep in the IRQ handler. I2C doesn't require a very low interrupt-handling latency, hence this change doesn't introduce any noticeable effects.
Signed-off-by: Dmitry Osipenko <[email protected]> --- drivers/i2c/busses/i2c-tegra.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 0727383f4940..c4262408bae7 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -533,7 +533,7 @@ static int tegra_i2c_poll_register(struct tegra_i2c_dev *i2c_dev, void __iomem *addr = i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg); u32 val; - if (!i2c_dev->atomic_mode && !in_irq()) + if (!i2c_dev->atomic_mode) return readl_relaxed_poll_timeout(addr, val, !(val & mask), delay_us, timeout_us); @@ -1719,9 +1719,10 @@ static int tegra_i2c_probe(struct platform_device *pdev) /* interrupt will be enabled during of transfer time */ irq_set_status_flags(i2c_dev->irq, IRQ_NOAUTOEN); - err = devm_request_irq(i2c_dev->dev, i2c_dev->irq, tegra_i2c_isr, - IRQF_NO_SUSPEND, dev_name(i2c_dev->dev), - i2c_dev); + err = devm_request_threaded_irq(i2c_dev->dev, i2c_dev->irq, + NULL, tegra_i2c_isr, + IRQF_NO_SUSPEND | IRQF_ONESHOT, + dev_name(i2c_dev->dev), i2c_dev); if (err) return err; -- 2.29.2
