From f60c4a02aa05817f00408ecefdf221f44781e08a Mon Sep 17 00:00:00 2001 From: Jonathan Cameron Date: Wed, 24 Aug 2011 17:28:37 +0100 Subject: [PATCH] staging:iio: prevent removal of module connected to trigger. Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/adc/ad7192.c | 6 ------ drivers/staging/iio/adc/ad7298_ring.c | 5 ----- drivers/staging/iio/adc/ad7476_ring.c | 6 ------ drivers/staging/iio/adc/ad7606_ring.c | 5 ----- drivers/staging/iio/adc/ad7793.c | 6 ------ drivers/staging/iio/adc/ad7887_ring.c | 6 ------ drivers/staging/iio/adc/ad799x_ring.c | 6 ------ drivers/staging/iio/adc/max1363_ring.c | 5 ----- drivers/staging/iio/industrialio-trigger.c | 3 +++ drivers/staging/iio/meter/ade7758_ring.c | 6 ------ 10 files changed, 3 insertions(+), 51 deletions(-) diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c index 1b07b6300b94..fd3790828789 100644 --- a/drivers/staging/iio/adc/ad7192.c +++ b/drivers/staging/iio/adc/ad7192.c @@ -605,12 +605,6 @@ static int ad7192_register_ring_funcs_and_init(struct iio_dev *indio_dev) static void ad7192_ring_cleanup(struct iio_dev *indio_dev) { - /* ensure that the trigger has been detached */ - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c index ab828a952fb4..5b87926ca7d4 100644 --- a/drivers/staging/iio/adc/ad7298_ring.c +++ b/drivers/staging/iio/adc/ad7298_ring.c @@ -189,11 +189,6 @@ int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev) void ad7298_ring_cleanup(struct iio_dev *indio_dev) { - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c index 2597fdaa50c5..41d6b8d59dd5 100644 --- a/drivers/staging/iio/adc/ad7476_ring.c +++ b/drivers/staging/iio/adc/ad7476_ring.c @@ -152,12 +152,6 @@ int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev) void ad7476_ring_cleanup(struct iio_dev *indio_dev) { - /* ensure that the trigger has been detached */ - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/adc/ad7606_ring.c b/drivers/staging/iio/adc/ad7606_ring.c index 52b0c1dbbc07..1c563ec22ac5 100644 --- a/drivers/staging/iio/adc/ad7606_ring.c +++ b/drivers/staging/iio/adc/ad7606_ring.c @@ -197,11 +197,6 @@ int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev) void ad7606_ring_cleanup(struct iio_dev *indio_dev) { - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/adc/ad7793.c b/drivers/staging/iio/adc/ad7793.c index aab752886c97..8a5857c0d80e 100644 --- a/drivers/staging/iio/adc/ad7793.c +++ b/drivers/staging/iio/adc/ad7793.c @@ -469,12 +469,6 @@ static int ad7793_register_ring_funcs_and_init(struct iio_dev *indio_dev) static void ad7793_ring_cleanup(struct iio_dev *indio_dev) { - /* ensure that the trigger has been detached */ - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/adc/ad7887_ring.c b/drivers/staging/iio/adc/ad7887_ring.c index 05ae4a09426f..cc39eee6b9c0 100644 --- a/drivers/staging/iio/adc/ad7887_ring.c +++ b/drivers/staging/iio/adc/ad7887_ring.c @@ -188,12 +188,6 @@ int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev) void ad7887_ring_cleanup(struct iio_dev *indio_dev) { - /* ensure that the trigger has been detached */ - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/adc/ad799x_ring.c b/drivers/staging/iio/adc/ad799x_ring.c index 7980fe54bd61..e268a61269ed 100644 --- a/drivers/staging/iio/adc/ad799x_ring.c +++ b/drivers/staging/iio/adc/ad799x_ring.c @@ -204,12 +204,6 @@ int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev) void ad799x_ring_cleanup(struct iio_dev *indio_dev) { - /* ensure that the trigger has been detached */ - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/adc/max1363_ring.c b/drivers/staging/iio/adc/max1363_ring.c index caa63cb07abd..d4db91d6e06c 100644 --- a/drivers/staging/iio/adc/max1363_ring.c +++ b/drivers/staging/iio/adc/max1363_ring.c @@ -195,11 +195,6 @@ int max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev) void max1363_ring_cleanup(struct iio_dev *indio_dev) { /* ensure that the trigger has been detached */ - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c index ccfd558d0902..7012f8ce8fd2 100644 --- a/drivers/staging/iio/industrialio-trigger.c +++ b/drivers/staging/iio/industrialio-trigger.c @@ -230,6 +230,8 @@ int iio_trigger_attach_poll_func(struct iio_trigger *trig, bool notinuse = bitmap_empty(trig->pool, CONFIG_IIO_CONSUMERS_PER_TRIGGER); + /* Prevent the module being removed whilst attached to a trigger */ + __module_get(pf->indio_dev->info->driver_module); pf->irq = iio_trigger_get_irq(trig); ret = request_threaded_irq(pf->irq, pf->h, pf->thread, pf->type, pf->name, @@ -256,6 +258,7 @@ int iio_trigger_dettach_poll_func(struct iio_trigger *trig, } iio_trigger_put_irq(trig, pf->irq); free_irq(pf->irq, pf); + module_put(pf->indio_dev->info->driver_module); error_ret: return ret; diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c index c29beec5e21e..2dec53220ef1 100644 --- a/drivers/staging/iio/meter/ade7758_ring.c +++ b/drivers/staging/iio/meter/ade7758_ring.c @@ -127,12 +127,6 @@ static const struct iio_ring_setup_ops ade7758_ring_setup_ops = { void ade7758_unconfigure_ring(struct iio_dev *indio_dev) { - /* ensure that the trigger has been detached */ - if (indio_dev->trig) { - iio_put_trigger(indio_dev->trig); - iio_trigger_dettach_poll_func(indio_dev->trig, - indio_dev->pollfunc); - } iio_dealloc_pollfunc(indio_dev->pollfunc); iio_sw_rb_free(indio_dev->ring); } -- GitLab