| From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 51/90] iio: imu: Use iio_trigger_get for indio_dev->trig assignment | Date | Tue, 5 May 2015 13:54:23 -0700 |
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3.13.11-ckt20 -stable review patch. If anyone has any objections, please let me know.
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From: Darshana Padmadas <darshanapadmadas@gmail.com>
commit 4ce7ca89d6e8eae9e201cd0e972ba323f33e2fb4 upstream.
This patch uses iio_trigger_get to increment the reference count of trigger device, to avoid incorrect assignment. Can result in a null pointer dereference during removal if the trigger has been changed before removal.
This patch refers to a similar situation encountered through the following discussion: http://www.spinics.net/lists/linux-iio/msg13669.html
Signed-off-by: Darshana Padmadas <darshanapadmadas@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/iio/imu/adis_trigger.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c index e0017c2..f53e9a8 100644 --- a/drivers/iio/imu/adis_trigger.c +++ b/drivers/iio/imu/adis_trigger.c @@ -60,7 +60,7 @@ int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev) iio_trigger_set_drvdata(adis->trig, adis); ret = iio_trigger_register(adis->trig); - indio_dev->trig = adis->trig; + indio_dev->trig = iio_trigger_get(adis->trig); if (ret) goto error_free_irq; -- 1.9.1
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