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authorJacek Anaszewski <j.anaszewski@samsung.com>2013-08-16 14:11:00 +0100
committerJonathan Cameron <jic23@kernel.org>2013-08-17 19:34:52 +0100
commitd536321df392ee0db6a5e92d98f0303020315f40 (patch)
treec3616492e72328c7a76ab22445d61f9bb167628c /drivers/iio/industrialio-trigger.c
parent1696f36482e7063051a1dad86a54be83fd847f4f (diff)
downloadlinux-d536321df392ee0db6a5e92d98f0303020315f40.tar.gz
iio: trigger: implement devm_iio_trigger_alloc/devm_iio_triger_free
Add a resource managed devm_iio_trigger_alloc()/devm_iio_triger_free() to automatically clean up triggers allocated by IIO drivers, thus leading to simplified IIO drivers code. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Kyunmin Park <kyungmin.park@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/industrialio-trigger.c')
-rw-r--r--drivers/iio/industrialio-trigger.c72
1 files changed, 68 insertions, 4 deletions
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index 0dd9bb873130..bf5e70a32d3f 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -424,9 +424,8 @@ static void iio_trig_subirqunmask(struct irq_data *d)
trig->subirqs[d->irq - trig->subirq_base].enabled = true;
}
-struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
+static struct iio_trigger *viio_trigger_alloc(const char *fmt, va_list vargs)
{
- va_list vargs;
struct iio_trigger *trig;
trig = kzalloc(sizeof *trig, GFP_KERNEL);
if (trig) {
@@ -444,9 +443,8 @@ struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
kfree(trig);
return NULL;
}
- va_start(vargs, fmt);
+
trig->name = kvasprintf(GFP_KERNEL, fmt, vargs);
- va_end(vargs);
if (trig->name == NULL) {
irq_free_descs(trig->subirq_base,
CONFIG_IIO_CONSUMERS_PER_TRIGGER);
@@ -467,6 +465,19 @@ struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
}
get_device(&trig->dev);
}
+
+ return trig;
+}
+
+struct iio_trigger *iio_trigger_alloc(const char *fmt, ...)
+{
+ struct iio_trigger *trig;
+ va_list vargs;
+
+ va_start(vargs, fmt);
+ trig = viio_trigger_alloc(fmt, vargs);
+ va_end(vargs);
+
return trig;
}
EXPORT_SYMBOL(iio_trigger_alloc);
@@ -478,6 +489,59 @@ void iio_trigger_free(struct iio_trigger *trig)
}
EXPORT_SYMBOL(iio_trigger_free);
+static void devm_iio_trigger_release(struct device *dev, void *res)
+{
+ iio_trigger_free(*(struct iio_trigger **)res);
+}
+
+static int devm_iio_trigger_match(struct device *dev, void *res, void *data)
+{
+ struct iio_trigger **r = res;
+
+ if (!r || !*r) {
+ WARN_ON(!r || !*r);
+ return 0;
+ }
+
+ return *r == data;
+}
+
+struct iio_trigger *devm_iio_trigger_alloc(struct device *dev,
+ const char *fmt, ...)
+{
+ struct iio_trigger **ptr, *trig;
+ va_list vargs;
+
+ ptr = devres_alloc(devm_iio_trigger_release, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return NULL;
+
+ /* use raw alloc_dr for kmalloc caller tracing */
+ va_start(vargs, fmt);
+ trig = viio_trigger_alloc(fmt, vargs);
+ va_end(vargs);
+ if (trig) {
+ *ptr = trig;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return trig;
+}
+EXPORT_SYMBOL_GPL(devm_iio_trigger_alloc);
+
+void devm_iio_trigger_free(struct device *dev, struct iio_trigger *iio_trig)
+{
+ int rc;
+
+ rc = devres_release(dev, devm_iio_trigger_release,
+ devm_iio_trigger_match, iio_trig);
+ WARN_ON(rc);
+}
+EXPORT_SYMBOL_GPL(devm_iio_trigger_free);
+
void iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
{
indio_dev->groups[indio_dev->groupcounter++] =