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i2c: tegra: Use threaded interrupt

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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 <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Dmitry Osipenko 2021-01-12 16:17:09 +03:00 committed by Wolfram Sang
parent 2e7f3db5d8
commit 3928bbb020
1 changed files with 5 additions and 4 deletions
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9
drivers/i2c/busses/i2c-tegra.c
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@ -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;