Commit 3928bbb0 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Wolfram Sang
Browse files

i2c: tegra: Use threaded interrupt 



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: default avatarDmitry Osipenko <digetx@gmail.com>
Signed-off-by: default avatarWolfram Sang <wsa@kernel.org>
parent 2e7f3db5

drivers/i2c/busses/i2c-tegra.c

+5 −4
Original line number Diff line number Diff line
@@ -550,7 +550,7 @@ 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);
@@ -1739,9 +1739,10 @@ 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;