From 9a4936dc89a34e002946a6c08b330918ec6afab8 Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Sat, 8 Oct 2016 17:39:15 +0100 Subject: [PATCH] staging:iio:accel:sca3000 Tidy up probe order to avoid a race. Previously the device was exposed to userspace and in kernel consumers before the interrupts had been configured. As nothing stopped them being enabled in the interval this could cause unhandled interrupts. Signed-off-by: Jonathan Cameron Reviewed-by: Lars-Peter Clausen --- drivers/staging/iio/accel/sca3000.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/staging/iio/accel/sca3000.c b/drivers/staging/iio/accel/sca3000.c index 586c120dbf41..6ffd608a2b36 100644 --- a/drivers/staging/iio/accel/sca3000.c +++ b/drivers/staging/iio/accel/sca3000.c @@ -1440,9 +1440,6 @@ static int sca3000_probe(struct spi_device *spi) indio_dev->modes = INDIO_DIRECT_MODE; sca3000_configure_ring(indio_dev); - ret = iio_device_register(indio_dev); - if (ret < 0) - return ret; if (spi->irq) { ret = request_threaded_irq(spi->irq, @@ -1452,7 +1449,7 @@ static int sca3000_probe(struct spi_device *spi) "sca3000", indio_dev); if (ret) - goto error_unregister_dev; + return ret; } indio_dev->setup_ops = &sca3000_ring_setup_ops; ret = sca3000_clean_setup(st); @@ -1463,13 +1460,12 @@ static int sca3000_probe(struct spi_device *spi) if (ret) goto error_free_irq; - return 0; + return iio_device_register(indio_dev); error_free_irq: if (spi->irq) free_irq(spi->irq, indio_dev); -error_unregister_dev: - iio_device_unregister(indio_dev); + return ret; } @@ -1496,11 +1492,13 @@ static int sca3000_remove(struct spi_device *spi) struct iio_dev *indio_dev = spi_get_drvdata(spi); struct sca3000_state *st = iio_priv(indio_dev); + iio_device_unregister(indio_dev); + /* Must ensure no interrupts can be generated after this! */ sca3000_stop_all_interrupts(st); if (spi->irq) free_irq(spi->irq, indio_dev); - iio_device_unregister(indio_dev); + sca3000_unconfigure_ring(indio_dev); return 0; -- 2.11.0