diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2020-03-23 12:41:25 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-04-19 16:56:18 +0100 |
| commit | 97b31a6f5fb95b1ec6575b78a7240baddba34384 (patch) | |
| tree | 1706a8316434d8c620f1488944631b5f81661c82 /drivers/iio/pressure/bmp280-core.c | |
| parent | b5fbf0568c51f5241b898388b3619286fa468d10 (diff) | |
| download | linux-97b31a6f5fb95b1ec6575b78a7240baddba34384.tar.bz2 | |
iio: pressure: bmp280: Tolerate IRQ before registering
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@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/pressure/bmp280-core.c')
| -rw-r--r-- | drivers/iio/pressure/bmp280-core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index 29c209cc1108..2540e7c2358c 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -713,7 +713,7 @@ 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) @@ -969,6 +969,9 @@ 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, |