From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> [ Upstream commit 97b31a6f5fb95b1ec6575b78a7240baddba34384 ] With DEBUG_SHIRQ enabled we have a kernel crash [ 116.482696] BUG: kernel NULL pointer dereference, address: 0000000000000000 ... [ 116.606571] Call Trace: [ 116.609023] <IRQ> [ 116.611047] complete+0x34/0x50 [ 116.614206] bmp085_eoc_irq+0x9/0x10 [bmp280] because DEBUG_SHIRQ mechanism fires an IRQ before registration and drivers ought to be able to handle an interrupt happening before request_irq() returns. Fixes: aae953949651 ("iio: pressure: bmp280: add support for BMP085 EOC interrupt") Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/iio/pressure/bmp280-core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index c9263acc190b6..36f03fdf4d4f9 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -630,7 +630,7 @@ static int bmp180_measure(struct bmp280_data *data, u8 ctrl_meas) unsigned int ctrl; if (data->use_eoc) - init_completion(&data->done); + reinit_completion(&data->done); ret = regmap_write(data->regmap, BMP280_REG_CTRL_MEAS, ctrl_meas); if (ret) @@ -886,6 +886,9 @@ static int bmp085_fetch_eoc_irq(struct device *dev, "trying to enforce it\n"); irq_trig = IRQF_TRIGGER_RISING; } + + init_completion(&data->done); + ret = devm_request_threaded_irq(dev, irq, bmp085_eoc_irq, -- 2.25.1