From: Jonathan Cameron <jic23@cam.ac.uk>
Date: Wed, 24 Aug 2011 16:28:37 +0000 (+0100)
Subject: staging:iio: prevent removal of module connected to trigger.
X-Git-Tag: firefly_0821_release~3680^2~4313^2^2~864^2~125
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f60c4a02aa05817f00408ecefdf221f44781e08a;p=firefly-linux-kernel-4.4.55.git
staging:iio: prevent removal of module connected to trigger.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
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 @@ error_ret:
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 @@ error_ret:
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 @@ error_ret:
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 @@ error_ret:
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 @@ error_ret:
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 @@ error_ret:
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 @@ error_ret:
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 @@ error_ret:
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);
}