Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

* 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (466 commits)
  net/hyperv: Add support for jumbo frame up to 64KB
  net/hyperv: Add NETVSP protocol version negotiation
  net/hyperv: Remove unnecessary kmap_atomic in netvsc driver
  staging/rtl8192e: Register against lib80211
  staging/rtl8192e: Convert to lib80211_crypt_info
  staging/rtl8192e: Convert to lib80211_crypt_data and lib80211_crypt_ops
  staging/rtl8192e: Add lib80211.h to rtllib.h
  staging/mei: add watchdog device registration wrappers
  drm/omap: GEM, deal with cache
  staging: vt6656: int.c, int.h: Change return of function to void
  staging: usbip: removed unused definitions from header
  staging: usbip: removed dead code from receive function
  staging:iio: Drop {mark,unmark}_in_use callbacks
  staging:iio: Drop buffer mark_param_change callback
  staging:iio: Drop the unused buffer enable() and is_enabled() callbacks
  staging:iio: Drop buffer busy flag
  staging:iio: Make sure a device is only opened once at a time
  staging:iio: Disallow modifying buffer size when buffer is enabled
  staging:iio: Disallow changing scan elements in all buffered modes
  staging:iio: Use iio_buffer_enabled instead of open coding it
  ...

Fix up conflict in drivers/staging/iio/adc/ad799x_core.c (removal of
module_init due to using module_i2c_driver() helper, next to removal of
MODULE_ALIAS due to using MODULE_DEVICE_TABLE instead).

1 files changed, 18 insertions, 16 deletions

diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c
index 68a4d4e..47ecadd 100644
--- a/drivers/staging/iio/industrialio-trigger.c
+++ b/drivers/staging/iio/industrialio-trigger.c
@@ -159,13 +159,12 @@ EXPORT_SYMBOL(iio_trigger_generic_data_rdy_poll);
 void iio_trigger_poll_chained(struct iio_trigger *trig, s64 time)
 {
 	int i;
-	if (!trig->use_count) {
+	if (!trig->use_count)
 		for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++)
 			if (trig->subirqs[i].enabled) {
 				trig->use_count++;
 				handle_nested_irq(trig->subirq_base + i);
 			}
-	}
 }
 EXPORT_SYMBOL(iio_trigger_poll_chained);
 
@@ -173,10 +172,9 @@ void iio_trigger_notify_done(struct iio_trigger *trig)
 {
 	trig->use_count--;
 	if (trig->use_count == 0 && trig->ops && trig->ops->try_reenable)
-		if (trig->ops->try_reenable(trig)) {
+		if (trig->ops->try_reenable(trig))
 			/* Missed and interrupt so launch new poll now */
 			iio_trigger_poll(trig, 0);
-		}
 }
 EXPORT_SYMBOL(iio_trigger_notify_done);
 
@@ -222,8 +220,16 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig,
 	ret = request_threaded_irq(pf->irq, pf->h, pf->thread,
 				   pf->type, pf->name,
 				   pf);
-	if (trig->ops && trig->ops->set_trigger_state && notinuse)
+	if (ret < 0) {
+		module_put(pf->indio_dev->info->driver_module);
+		return ret;
+	}
+
+	if (trig->ops && trig->ops->set_trigger_state && notinuse) {
 		ret = trig->ops->set_trigger_state(trig, true);
+		if (ret < 0)
+			module_put(pf->indio_dev->info->driver_module);
+	}
 
 	return ret;
 }
@@ -336,6 +342,8 @@ static ssize_t iio_trigger_write_current(struct device *dev,
 	mutex_unlock(&indio_dev->mlock);
 
 	trig = iio_trigger_find_by_name(buf, len);
+	if (oldtrig == trig)
+		return len;
 
 	if (trig && indio_dev->info->validate_trigger) {
 		ret = indio_dev->info->validate_trigger(indio_dev, trig);
@@ -473,12 +481,10 @@ void iio_free_trigger(struct iio_trigger *trig)
 }
 EXPORT_SYMBOL(iio_free_trigger);
 
-int iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
+void iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
 {
 	indio_dev->groups[indio_dev->groupcounter++] =
 		&iio_trigger_consumer_attr_group;
-
-	return 0;
 }
 
 void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev)
@@ -490,18 +496,14 @@ void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev)
 
 int iio_triggered_buffer_postenable(struct iio_dev *indio_dev)
 {
-	return indio_dev->trig
-		? iio_trigger_attach_poll_func(indio_dev->trig,
-					       indio_dev->pollfunc)
-		: 0;
+	return iio_trigger_attach_poll_func(indio_dev->trig,
+					    indio_dev->pollfunc);
 }
 EXPORT_SYMBOL(iio_triggered_buffer_postenable);
 
 int iio_triggered_buffer_predisable(struct iio_dev *indio_dev)
 {
-	return indio_dev->trig
-		? iio_trigger_dettach_poll_func(indio_dev->trig,
-						indio_dev->pollfunc)
-		: 0;
+	return iio_trigger_dettach_poll_func(indio_dev->trig,
+					     indio_dev->pollfunc);
 }
 EXPORT_SYMBOL(iio_triggered_buffer_predisable);